معماری و عمرانعلوم مهندسی

Behavior Modeling and Design

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18 ‏متم طع‎ Modeling and Design of Shear Wall- ۱۵ ‏كلاه دزت‎ Naveed Anwar Asian Center for Engineering Computations and Software, Pe te

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The Basic Issues 0 CoreC) boot ge ets Bre ~ Transfer of loads to shear walls - Modeling of shear walls in 2D - Modeling of shear Walls in 3D 2 - Interaction of shear-walls with frames * Design and detaining issues - Determination of rebars for flexure - Determination of rebars for shear - Detailing of rebars near openings and corners - Design and detailing of connection between various commonest of cellular shear walls Chea Dd Brbator, Dodebay, Poder wd Dewi

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Due to misleading name “Shear Wall” pi " The dominant mode of failure is shear " Strength is controlled by shear = Designed is governed primarily by shear " Force distribution can be based on relative stiffness Chea Dd Brbator, Dodebay, Poder wd Dewi

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Shear Wall or Column

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۱ Shear Wall or Frame Shear Wall Shear Wall or Frame ? Ss =>

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Shear Wall and Frame Behavior Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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Shear Wall and Truss Behavior Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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Shear Wall and Frame Shear Wall Behavior ‏ا‎

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‎AIT ۱۳ POCCODE‏ مس0 و 4 رطط ,هه ‎Od‏ و۵ ‎ ‎ ‎

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Frame and Frame-Shear Wall

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۰ Frames Deform - Predominantly in a shear mode - Source of lateral resistance is the rigidity of beam- column/slab joints 2 ۶ ‏انعد للع‎ - Essentially in bending mode - Shear deformations are rarely significant - Only very low shear walls with H/W ratio <1 fail in shear - Behave mostly like a slender cantilever - Designed to resist the combined effect of axial, bending and shear Chea Dd Brbator, Dodebay, Poder wd Dewi

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The Basic Behavior of ‘ar Walls, Frames and Shear Wall-Fri Chea Dd Brbator, Dodebay, Poder wd Dewi

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9۱ ‏ای‎ Only Frame Only Shear + ۳9 a 1 Frame ( Total 3 ) 10121300255639 -- - - 2 ‏و وت خ‎ 1 Cases ) a 9 23 00 rr Cases: Chea Dd Brbator, Dodebay, Poder wd Dewi

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۱ 0 له سس رف( سم 3 ‎Chea‏

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Cl Interaction ‎bs SV acc‏ - اام ‎0 ‎ ‎OC ea rete ‏موت 0ل‎ ‎ ‎5 ‏0 له سس رف( مه ‎Chea Dd‏

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Interaction

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00 85. 0 0 له سس رف( مه ‎Chea Dd‏

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۱ ۱

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۱ مس 9۵ مت 9 > مس مها دوت كن" رون كم - ‎COR‏ Chea Od rhator, Dodebay, ‏له سس‎ 0

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مس 90 - مس لوط 3-4 ,بط( عم 3 وق

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مس مت ‎er UO Bad‏ Oke Od ‏بط ,وه‎ J

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7 0 له سس رف( مه ‎Chea Dd‏

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الات eect

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Qorey Orfevitos (IOGorey Gulkdtog) Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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Shear Wall-Frame Interaction Gorey OeRecitoa (@DGvrey @utldtas) Chea Dd Brbator, Dodebay, Poder wd Dewi

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Shear Wall-Frame Interaction Qorey Orfevitos (DGorey Butldtag) Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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Shear Wall-Frame Interaction A < ‏انا ۳ 6۳۳ | سم‎ = Porve / A he (poem ee LOE Ep SE 4 ‏مم - 9001006 - .ىسايق‎ ‏ط نه ند‎ 2002 KO eS 6۸9: 9, ‏یر‎ - 600 / 02.66 - 9.79« 2-0 90*۲0۵ 2 ین دادیم عسخ۵۳ 0۵0006 لب 0 له سس رف( سم 3 ‎Chea‏

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Change in Shear Wall Moments slab w/bearn coupling 1 — ‏ومو و‎ 1000 1600 2006 2500 3000 500. Shearwall Murent (He kips مس0 و 4 ‎Ordeby,‏ ,هه ‎Od‏ و۵

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Coupling Element Moments مومس م2 وا وه ‎Coupling Elements (tekips)‏ ] مس0 و 4 ‎Ordeby,‏ ,هه ‎Od‏ و۵

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112641 ١9 62۳ ۸ 6080867 ۸ Di ۳ 7 - Chea 3 ‏له سس رف( سم‎ 0 AIT ۱۳ POCCODE

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Distance {rom graund 2 5 9 Uniform Load = Trangular Load 1 1 0.5 06 07 08 Deflection of structure ] 10۳ ‎AIT ۱۳ POCCODE‏ مس0 و 4 رطط ,هه ‎Od‏ و۵ ‎ ‎ ‎ ‎ ‎ ‎ ‎

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Comparison of... : Type A | tt tt of iing=110 8 3 مس0 و 4 ‎Ordeby,‏ ,هه ‎Od‏ و۵

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سس ورزد شتسه هلف ‎aot‏ تم ۱۷۱ ‏ما‎ aa

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Comparison of... : Type C مس0 و 4 ‎Ordeby,‏ ,هه ‎Od‏ و۵

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Comparison of... : Type D 1 il lenghof balding 110 ‏سس‎ ‎2 wt اكاب وص ووو مس0 و 4 00 ,هه ‎Od‏ و۵

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AIT ۱۳ POCCODE

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Wall-Frame Interaction: Key Conclusions The shear wall deform predominantly in bending mode - The common assumptions to neglect the frames in lateral load resistance can lead to grossly erroneous 1 ‏ارت‎ - Consideration of shear wall-frame interaction leads to a more economic design - The shear walls should be designed to resist the combined effect of axial, bending and shear = ‏نان رو‎ og the alee ee in aot in very important, both Ghee Od Prkatr, ee cere ert ‏سس‎

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Basic Types of Shear Walls _ سيت

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we Basic Types of Shear Walls __

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Simple Beam 8۰3۳ ۱[ عاصه‌صعاه تن وون۳۷* ‎with rigid‏ سرت ‎Model”‏ 5لمع Chea Dd Brbator, Dodebay, Poder wd Dewi

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Frame Model for Planer Walls ۱ 0 On ecad Cee aie tec na ۱ ea ‏كك‎ 00 Rae oe eae ed — ‏سم‎ +: 01 0 ke Se eM Rr a ۱ coe cA en ola co bir Pane Chea Dd Brbator, Dodebay, Poder wd Dewi

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Frame Models for Cellular Walls Difficult to extend the Coleyitersy el Mm KOM ‏ا‎ ٠ ‏اقا ۱۷۵ مهن‎ 6 eN aK to “equivalent” column and ‏كأصعدمعاء “لأيت” عمأمتدمم رمه‎ * Can be used in 2D analysis but more complicated for 3D analysis ل ا الا كان ا ‎converted to planer wall, the‏ ‎simplified procedure cab‏ ‎used for modeling‏ Chea Dd Brbator, Dodebay, Poder wd Dewi

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Walls are subjected to in-plane deformations so 2D elements that have transnational DOF need to be used * Acoarse mesh can be used to capture the 2 overall stiffness and deformation of the wall ‏ا الا وا‎ yi Alnac minty ey tbat) bending or curvature * General Shell Element or Membrane Elements can be used to model Shear Walls Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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A Modeling Walls Using M e Nodes: 4 DOFs: 2 DOFs /Node Ux and Uy 2-Translation 1 ۱ Dimension: 2 dimension element ‎eae‏ اا لكت ‎Properties: Modulus of Elasticity(E),‏ ‎Poisson ratio(v), Thickness(t )

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00611110 Wallis using pl 061 Nodes: 4 DOFs: 3 DOFs /Node Ux and Uy and Rz 7 7/۷ ‏ا ال‎ Shape: Regular / Irregul. — Properties: Modulus of Elasticity(E) Poisson ratio(v), Thickness(t ) Dimension: 2 dimension element Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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Using Incomplete Membrane Using with Beams and or 00۲ Columns are Required (No Moment continuity with (Full Moment continuity ‏(كمتدو8‎ with Beams and Columns) Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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ter accuracy in determination of ‏و‎ ‎easy modeling of openings Using Complete Membrane Using with Beams, 00۲ ‏عصصبامن‎ ‎is NOT Required (Moment continuity ‏"الدع سمغبة مصدع8 طاغتيور‎ ‏اللي‎ (Car MB UC rtontmelystaretttin with Beams and Column: Okra (9 Pekar, Dodetoy, Badyer cod Devi

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ing Walls to Slab Some software automatically establishes connectivity by using constraints or “Zipper” ‏اك ان‎ Conne / In general the mesh in the slab should match with mesh ‏طعتاطهؤدة مغ 1لهت1 قط صذ‎ connection

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* The behavior of shear walls can be closely EV Hectic m maar omc OH - The vertical elements provide the axial-flexural ‏ةا‎ eLc) 2 - The diagonal elements provide the shear resistance Ce Bat ‏ا ل ال لان ا ا ا ا‎ concepts * This model represents the “cracked” state of ‏صرح عهنا بط مها 6 صمتعصها له عتمطای الق انا‎ compression by concrete Chea Dd Brbator, Dodebay, Poder wd Dewi

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Truss Model for Shear Walls Comparing Deformation and Deflections of Shell Model with Truss Model Ghew Ord Debate, Oodet

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Truss Model for Shear Walls Comparing Deformation and Deflections of Shell Model with Truss Model Ohea Dd ‏مه‎ ۵

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Truss Models for Shear Walls Comparing Axial Stress and Axial Force Patterns Chea Dd Brbator, Dodebay, Poder wd Dewi

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How to Construct Truss Models For the purpose of analysis, assume ‏لل ل ا ال نا‎ width and floor levels ‎L}‏ ا 1لا ‎estimated as t x 2t for main axial Sutil ‏ل لل‎ members ‎ay‏ ا ا كا ‎truss. It is not necessary to use‏ ‎truss elements‏ ‎Generally single diagonal is sufficient for modeling but double diagonal may be used for easier interpretation of results ‎The floor beams and slabs can be COA Kemal MRO RAT Cnty ‎ ‎tx2t ‎ ‎ ‎AIT - Teak POCCODE ‎Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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_Openings in Shear Walls. Very Large Openings may lena TCM to Frame 86207 er) Vala) Medium Openings may convert shear wall to Pier and Spandrel System iia — — 5207 ۱6۲ Very Small ]9( ering not alter wall ‏و۱۱‎ = =

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Openings in Shear Wa. Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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Openings in Shear Walls - Planer 1 0 له سس رف( سم 3 ‎Chea‏

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; Modeling Walls with Opening 01 ۲:۵ لأزونه ل ‎mC‏ انا 0 له سس رف( مه ‎Chea Dd‏

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۱

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- 4-Node plane element may not accurately capture the linear bending, because constant shear distribution is assumed in formulation but actually shear stress 2 distribution is parabolic - Since the basic philosophy of RC design is based on cracked sections, it is not possible to use the finite ‏اون عملباوع! عاصمصواه‎ ۶0۲ 1 - Very simple model (beam-column) which can also captures the behavior of the structure, The results can be used directly to design the concrete elements. Chea Dd Brbator, Dodebay, Poder wd Dewi

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Shear Wall Design -Meshing Shell Deformations: - ‏همعط‎ eed oe La ee RT ‏وعمءترو يت فلنام أمعسرعكء افطع‎ - A single shell element in the program ‏تترم1ع0 لهتكه قصة “تمعطاى عع سساحرده‎ 205 1 Eola Ba ‏ولسءط ارده‎ b) Shear Deformation c} Bending

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0 له سس رف( مه ‎Chea Dd‏

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0 له سس رف( مه ‎Chea Dd‏

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Comparison of Behavior

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+4 44014 aT?

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ect of Shear Wall L Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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۳ ty of Shear Walls In ETABS

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- Zoning Ce ON ‏لب لس‎ ۱ - Labeling . ‏سرهم‎ ‎| ۰ ‏ی‎ - Section Types 0 Cn od (OM aoe) ‏أ‎ eee ncaa ۱

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Shear Wall Design -Meshing Appropriate Meshing and labeling of Shear Walls is the key to proper modeling and design of walls No automatic meshing is available for walls (only manual) Loads are only transferred to walls at the corner points of the area objects that make up ‏ات‎ Generally the Membrane or Shell type Elements should be used to model walls * Wall Meshing a Chea Dd Brbator, Dodebay, Poder wd Dewi

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Wall Meshing: - Piers and spandrels where bending deformations are significant (slender piers and spandrels), need to mesh the pier or spandrel into several elements - If the aspect ratio of a pier or spandrel one shell element is worse than 3 to 1, consider additional puoshing of the element to 0017

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Shear Wall Design - Pier Zones __ Pier Zone Labeling (Naming/Grouping) ree a Mec Ne cae Re ee coe 02000 ‏ل‎ 7 eed Regen AO ae enone ae Coe NE Rad ae aaa ed edt a Reel Ra coe as EER Dol a Rie hoor ed yet pulput Porces Por the elewedt or bePore pou coo desiqa the elewet. ©0000 بو - ۸۱۲ مس0 و 4 ‎Ordeby,‏ ,هه ‎Od‏ و۵

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Shear Wall Design - Pier Zones Se ‏لي ا‎ 7 mh ce ace a ۱ cae ase ‎ot stativar‏ اا ‎booted at he top aed botiear oP ual pier elewents.‏ ‎ ‎Draked _POCOODE ‎Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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۱) ‏6ستاعطهة]آ‎ ‎Examples

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eneral Comments ۴ Cased TR aE a ‏ل‎ ‎Pd SSE ae aR e LA caida a ee 00 00 ‏ا م‎ ne Re Beane a aoe Oe han marae ease oR De 9۳ CAN La a el ead ‏(عسام‎ 566100 ۲6۴ ‏و85‎ ‎at Il Floor Top

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2 General Pa Case a: 9 cee Cental ie eek ne a 0 ‏موم‎ ‎0 ‏0ك‎ ‎em neta eee R coed ‏موی با مسا موجه )و‎ 00 وه ا 0ك 00000000 bower bevel.

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Genera comment Case a (Common Way): ek eel i Nek ane cae] De ‏ا‎ ‎Cee een hte feet dood ca oe ‏سول‎ ‎eT ae‏ ره ‏رت ‏ره ‏| ‏ره ‏ار و بات بل لو ول با بط ‎Ce eee ed coe a ‎ ‎ ‎

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Sections يدير و یوت ‎tive‏ ‎Unite: Kinin‏ و ما ‏يدير ‎‘orn‏ ‎va ‎uo ‎a0 ‎om ‎ama ‎STORY® PotD: ‏عماج اليم‎ ‏رمس عنام ‎Flew‏ ل ‎ato‏ ‎ ‎۱9۵2 4 ‎ee i )0 ‏عوام جنوج‎ -© ۱۱۱ ‏عونم‎ 46 ‏ععذم طاعوع 06] غنام أن 0 ‎ow ‎1 ‎pa ‎

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Shear Wall Design - Spandrel Zones Spandrel Zone Labeling (Naming/Grouping) 05 aE aa sR cao Wo) Nea ar ee cl (acd) 1 5 ce rca aN cae RENE a Ba cB Cacao Sn Oa ec cad ea ioe concede cca vce REE aoe CA RR cca ei oI OA Carico Ce ca Rc cee eR ANN ci Dee al Chea Dd Brbator, Dodebay, Poder wd Dewi

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Shear Wall Design - Pier Zones Example of Possibly Incomplete Wall Pier Labeling مس0 و 4 ‎Ordeby,‏ ,هه ‎Od‏ و۵

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Shear Wall Design - Spandrel Zones Spandrels or ۳ - Wall spandrel forces are output at the left and right ends of wall spandrel Elements - Wall spandrel design is only performed at stations located at the left and right ends of wall spandrel elements - Multiple wall spandrel labels cannot be assigned to a single area object. Chea Dd Brbator, Dodebay, Poder wd Dewi

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Wa

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Fully integrated wall pier and spandrel design ACI, UBC and Canadian Codes Design for static and dynamic loads Automatic integration of ‏صوصو 0صه عرمنص 101 وع©01]‎ 1

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* Design based on : - Equilibrium Conditions — Strain Compatibility Principle ~ Linear Strain Variation | | | | 1 . Stress Diagrah ۳ | | Linear Strain nde

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Concrete Shear Wall Design 2D wall pier design and boundary-member checks + 2D wall spandrel design * 3D wall pier check for provided reinforcement * Graphical Section Designer for concrete rebar 2 location * Graphical display of reinforcement and stress ۵105 * Interactive design and review * Summary and detailed reports including database formats Chea Dd Brbator, Dodebay, Poder wd Dewi

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Shear Wall - Typical Design Process تس تال بل زیر 2. Choose the Shear Wall design code and review other ‏فطع عوأالاعء عصة دععمعمعقعمم لعغواعء‎ Cet La ترا اعلمهمك لصة ععأم موأوكهة .3 2 درز ایا یار ات لیا .3 5ع الالزء لاه لاوأدكه8 .4 5. Select Design Combos اه راو ۱۳ 0 له سس رف( مه ‎Chea Dd‏

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Shear Wall - Typical Design Process 7. View Design Input and Output Information 8. Design the Member Interactively 2 9. Print Design Report BRM elt Tile (mers etal lel تا رات ایا وت ‎pe‏ 12. Repeat the Above Cycle Chea Dd Brbator, Dodebay, Poder wd Dewi

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Shear Wall Design - Output Tablo 1 Shoar Wall Dosign Output Summary COLUNN HEADING DESCRIPTION ‘Simplified Pier Section Desian’ Sony Labo Labol of the story level aesooited with the pier Pier Label abel 7 ‘Salion Location This § ether Top or Bottom to designate the lop or ha bation tthe pier. ge Memb Len ‘The long oF ie userstetmed ede member, DBA, oF tie length ofthe program-detormined edge membor at tho kf sido tthe ples ‎Memo Rink | Thelenoti of the user-defined edge mombsr, DBT, or the‏ دولك ‎length ofthe program-determined edge member atthe igh‏ ‎‘se of he ple ‎‘Tho roared area of sted altho cantor ofthe edge moniber at ‎tie lel se ofthe pk. Note thal the area of steel reported here ‎|s the maximum of the required tension sleet andthe requirad ‎compression steel ‎AS Right ‘The filed area oT Stes al Ne center ofthe edges member al tho right sido f the pior. Noie that the area of stool rapartod ‎here isthe maximum cf the recuied tension steel and the = ‎quired compression steel ‎Av Shear The required area per unitiength (heigh) cf harizorial shear ‎‘eiorcina steel nthe pet ‎B Zone Length This om opplins only lo codes thal sonsidor boundary zone. ‎This isa teauited lena, sucha 22.762 incies, otis "Not ‎[Necdod\" ori "Net Checkad)" Not Needed! nc.eates thet ‎boundary oloments are not required. Noi Chooked mocns that ‎ny chock fos boundary elements is performed by the program ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎

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i maximum requires rao caus othe etal arsa of vera & te Seaton Designer ion. Tsai is prodded asa benchmark to hes you un The mavirum area pat jot honaonia re Node" ort "Not Ch od dl under elarant chee 5 ا 0 Ege

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‎Label‏ سس ‎[Piertabel [|‏ ‏|[ #قعوس] ‎mum area per unit length (height shear in the s ‎inches, ort is "Not ‎Needex cked.” Not Needed indicates that ‎boundan eked means that th ‎

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Shear Wall Design - Output Spandrel Design Slory Label Label ofthe sory fovel assodated withthe spandrel ‎Label Label assigned to the spare‏ اه هرک ‎Station Location This is eer Left or Right to designate the left end or the ight end ofthe spandre ‎[107 “The length of he spancrel ۹1/۱32۹ the ‏اع‎ ‎Shear Vo “The conorete shear capacity used in the spandrel design, See ‎ ‎in Technical ‎ ‎etermine the e Shear Capach ‎in Technical. Note 8-99, of "Determine the C ‎‘Shear Canacitv’ in Technical Note Soandrel Shear Desian ‎S81 10-89 for more information. ‎Fleguired Feinforcing 5621 ‎ ‎ ‎andrei ‎ ‎2 ‎10 “The required area of flexural reinforcing steel at the top of the spandrel ‎“The required area of flexural reinforcing sted al the betlom of‏ لصالا ‎the spandrel‏ ‎3 “The required area per unit engin of vettioal shear reinforcing stool in ho spandal ‎An ‘The required area per unit length (height) of horizontal shear feinforcing steel in the spandrel, ‎Ave ‘The required area of diagonal shear reinforcing sieal in the ‎ ‎ ‎ ‎spandrel This tem is only calculated for selsmic piers. ‏ماه 9 حواق.‎ Doriobas, ‏سب سوت‎ eens: ۳۳۳۳۱ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎

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The Basic Issues - Transfer of loads to shear walls - Modeling of shear walls in 2D - Modeling of shear Walls in 3D 4 - Interaction of shear-walls with frames * Design and detaining issues - Determination of rebars for flexure - Determination of rebars for shear - Detailing of rebars near openings and corners - Design and detailing of connection between ‏ل فلن‎ meter 0 له سس رف( مه ‎Chea Dd‏

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A ~~ Eccentricity in 8 1 : : ayy Chea Od Pehaior, Dodebry, ‏له سس‎ 0 AIT - Teak POCCODE

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0 له سس رف( سم 3 ‎Chea‏

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Expansio Joint ۷ ايد ‎FE‏ ‏۳ ‎s 2‏ م د ذه 5 ‎ie]‏ د 3 2 ۳ 8 بم ‎ae‏ © ‎AS 75‏ ‎ean ‎q ee a 3 ‏ظ‎ ۵ ‎a oe > 5-5 ‎Wa ‏شنم(‎ ‎No Shear Walls ‎

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0 له سس رف( مه ‎Chea Dd‏

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0 له سس رف( مه ‎Chea Dd‏

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Axial Stresses in Cellular Walls Uniaxial Bendin: Chea Dd Brbator, Dodebay, Poder wd Dewi

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Axial Stresses in Cellular Walls Biaxial Bending Chea Dd Brbator, Dodebay, Poder wd Dewi

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0 له سس رف( مه ‎Chea Dd‏

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"+ C+ Dsin@) x. + Dsin@)x, ‎Compression‏ عمتعهع1 ‎Member Member‏ ‎ ‏©0000 بو - ۸۱۲ مس0 و 4 ‎Ordeby,‏ ,هه ‎Od‏ و۵

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11 fn are the nodal stresses at section A-A , obtained from analysis 0۵0000 لمرلا مس0 و 4 ‎Ordeby,‏ ,هه ‎Od‏ و۵

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The curve is generated by Dela sii maw Lied eb ‏طامرع0‎ بق ‎Nx= | paceraar 3 Bi‏ ia بل مه 3° ‎f(e)dadzt‏ مره il

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تا لا ات تابن ۱ ‎changing Angle‏ ‎and Depth of‏ ‎Neutral Axis‏ 0 هد ره مرصده جر عد امآ 12 1 ‎dxdy: y..+ — ۴ 3‏ )م ] —|,$= ‎M,‏ ‏| مدرم ی ‎ey‏ سرا 5 وه - با ‎x.|‏ 9 مه برچ ومد جز دام لش |ممت رم ‎ ‎Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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Interaction Surface and Curves =

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3 ‏و‎ ‎The capacity is almost — completely un-axial ۹ Moment capacity can be increased by providing Rebars at the corners

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The capacity is 212051: completely العاف ها

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+ ~ عع 2 <2

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Axial Zone Model - Planer Wall Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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Shear Design of Pier “7 1 * Determine Concrete shear capacity, Vc ¢ Check if Vc exceeds the limit, if it does, section 7 | needs to be revised _ * Determine steel Rebars by 115-17-1 ¢ Check additional steel 101 ‏عتسدكلعءك‎ ‎requirements Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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‎ACI Equations for Pier Design‏ دح ‎Basic Concrete a 5‏ ‎

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۱ shear capaci * Check if Vc exceeds the limit, if it does, section 2 needs to be revised * Determine steel Rebars for Vs=V-Vc * Check additional steel for seismic requirements Chea Dd Brbator, Dodebay, Poder wd Dewi

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4 Check for minimum steel and spacing etc. ۲۲89۳9 مس0 و 4 ‎Ordeby,‏ ,هه ‎Od‏ و۵

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5 quations tor Spanare 3 — 05 and ‎AIT ۱۳ POCCODE‏ مس0 و 4 ‎Ordeby,‏ ,هه ‎Od‏ و۵ ‎ ‎ ‎

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Notations for Shear Design EMA e ‏ال‎ MRC ROM Restores fistance from bottom of spandrel to the centroid of bottom reinforcing 0 ‏امتفصدوه ۶ه‎ = Shear reduction factor as specified in the concrete material properties for light weight concrete. 5 Te Mod eters ot ortion of Shear force in spandrel carried by reinforcing steel Joan Morac) rvs occ BU Ms cetera eres Neon ec122 Chea Dd Brbator, Dodebay, Poder wd Dewi

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Wall Sec 7 6 ‏ا لا‎ ‏ااي اانا‎ he middle portion * Confine the Rebars at the end for improved ductility and increased moment capacity Option -1 Option -2 Option -3 Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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Moment a for 1% Rebars Nearly 25% increase for same steel

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9 تا اس سس ۱ عاناطساكتل مسد كع صرم ‎the remaining in the‏ سییر ۱۱ Confine the Rebars at ‏1ط 101 ستعصرمه عط‎ ductility and increased moment capacity Provide U-Bars at the ‏لتعأكدة 101 كتزاع ترون‎ ا ال اننا improved laps Chea Od Pehaior, Dodebry, ‏له سس‎ 0 ۲۲89۳9

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Moment Capacity for 1% Rebar:

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Rebar Detailing For Openings __ Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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ی 0-5-2 ess of ۱1 ۱۱۱۱۱۱۱

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Complexity 7 | ۰ ‎Te ۳۳‏ ل ‎2 ‎ ‎ ‎Slenderness: ‎ ‎Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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a ۱۵۵۸ مشک فایلا تاد ۱ Short Column LongColumn Column Capacity (P-M

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* “Effective” Length - Actual Length ۱ - End Framing and Boundary Conditions - Lateral Bracing Conditions * “Effective” Stiffness - Cross-sections Dimensions and Proportions - Reinforcement amount and Distribution - Modulus of Elasticity of Concrete and Steel - Creep and Sustained Loads * Loads - Axial Load - End Moments and Moments along the Length Chea Dd Brbator, Dodebay, Poder wd Dewi

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137ل ااا ‎ee‏ للش ‎Larger Non- Sway Moment‏ اانا ‎Larger Sway‏ از ات ‎Momen t‏ 3 ‎ ‎C,, =0.6+ ‏له‎ 204 M2

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What is Sway Sway is dependent upot ructural configuration as well as type of loadin RRS ‎May be Sway‏ ۷۵ 12 ناماع مس مس تسف 9 ‏غك ‎seers)‏ ‎ ‎Chea Od Pehaior, Dodebry, ‏له سس‎ 0 ‎ ‎ ‎

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۱ What is Sway SNe جد * Appreciable rel. 3 ioment of two ends of column A Chea Od Pehaior, Dodebry, ‏له سس‎ 0

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. More on Sway 2 * Unbraced Column (Sway) 1 : Chea Dd Brbator, Dodebay, Poder wd Dewi

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Calculation of 6,,, (Non-Sway) 0ل 9 ‎ccc‏ لك ‎

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The C,, Factor The Moment and Stress Amplification Factors are derived on the basis of pin-ended columns with (C,, = 1.0) For other Moment ‎i Oe 60‏ مط رصمتاطنتعنط ‎correction factor C,, ۱ 121112 ۱۷/۹/۸‏ ‎needs to be computed to ۱ | Negative‏ ‎modify the stress i 5‏ ‎amplification. 111 15 26 55221167 0‏ ‏بر ‎ ‏مممهههه ی ۸۱7 مسب ییوس 0

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re about C,, Factor we i | 3 3 5 ّ > ۵ 1 2 كل

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Effective Length Factor, K. * To account for “Axial-Flexural Buckling” 1۱ cne CM boas ta Romeo ttt ty inflection points ۱ ‏ارچ‎ ROBT * Most common range 0.75 to 2.0

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... Determination of K * Members Part 1 ‘ramed Structure geet Go 1+ G, forG,<2 Odraed 20 ‏حدد‎ K=09/(+G,) 105 ‏ي©‎ <2 Orv K=0.7+0.0%G,+G,) <1.0 (oie) | K=0.85+0.05G, <1.0 _S(El/ Ie) Columns G, =TopEnd S(El/ D Beams G, =BottonEnd KaG G IncreasK Increas: G, = Minimum G, and G, مس0 و 4 ‎Ordeby,‏ ,هه ‎Od‏ و۵

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‎Determination of K.‏ ... سا ‎* Isolated Memb ‎ ‎ ‎Bottom ‎AIT - Teak POCCODE ‎ ‎Chea Dd Brbator, Dodebay, Poder wd Dewi

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More about Factor K S(EI/I,) Columns 2) Beams Kay 1 0 0 ‏ا‎ Raa Toe ‏سا‎ 52 1 ۱ ‏ا لي‎ Or ied ۱۳ C1 Le 83 . 4 Exampley , oe BL B.

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of Stiffness ET ,۱06ص ۲۵ احرحصها ‎Cracking, Variable E, Creep effect‏ - ‎Geometric and material non linearity‏ - * I, = Gross Moment of Inertia * I,, = Moment of Inertia of rebars V 8, = Effect of creep for sustained loads. = P,,,/P,, Chea Od Pehaior, Dodebry, ‏له سس‎ 0 ۲۲89۳9

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‎Slenderness procedure for Buildings‏ سا ‎ ‎Vur Vor || Vor ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‏©0000 بو - ۸۱۲ 0 و 3 طط ,موه ‎Ohew Od‏ ‎ ‎ ‎ ‎ ‎

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۲۲89۳9 0 له سس رف( سم 3 ‎Chea‏

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ل ‎TOT‏ ‏هت et Cae kn یساس تسا يي ‎ee‏ نك سجن ا ل اك (©6.6 لم امه د ‎eed ed Meee‏ مد مج ©0000 بو - ۸۱۲ مس0 و 4 رطط ,هه ‎Od‏ و۵

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Some Special Cases

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