Shear Wall Design process as pertinent t pertinent to SCPL design office.

Shear Wall Design Parameters we will be discussingApplicable codes.Stepwise design process/flow.Comparison of ETABS and RCDC values.Comparison of RCDC and Spreadsheet values.Comparison of design as a Shear wall and as a a Column quantity takeoff.Discussion/Conclusion.

Sr.Design CriteriaClause / Code1Max Area of reinforcement26.5.3.1 a/b2Min Area of reinforcement26.5.3.1 a/b3Min Number of bars26.5.3.1 c4Min. eccentricity Calculations25.4 & 39.25Effective Length25.26Slenderness Moments25.3 & 39.77Design for axial loads39.38Design for axial loads and uni-axial bending39.59Design for axial loads and biaxial bending39.610Design of horizontal links26.5.3.211Design of shear strength40.2Design criteria and applicable codesIS 456-200Sr.Design CriteriaClause / Code1Spacing of Special confining reinforcement9.4.5 and 7.42C/s Area of Special confining reinforcement7.4.73Applicability of boundary element9.4.14Muv Moment capacity of webAnnex A and 9.35Additional comp force in BE9.4.26Check for BE in tension and compression9.4.3 and 9.4.47SW general requirement9.1.1 to 9.1.78SW Shear Strength9.2.1 to 9.2.69Construction Joints9.810Development, Splice and Anchorage9.9Design criteria and applicable codesIS 13920-1993 Ed 1.2 (02-03)Elements of Shear wallWeb non confining/ non ductileBoundary Elements Confining/ductileVertical reinforcement and stirrups For Non confining zone (BE)For Confining zone (Web)

BEWebBEShear Wall in RCDCShear Wall in RCDCShear Wall in RCDCObservations on RCDC and shear wall designRCDC designs conservative boundary elements as the lever arm considered by RCDC is more w.r.t. code specification, This results in greater moment which is in turn greater axial force (force couple analogy).RCDC is silent on Cl. 9.8 construction joints i.e. vert. reinf. ratio = 0.92/fy(Tv-Pu/Ag) it is very likely that walls are casted in two lifts. All in all RCDC designs are satisfactory.

Observations on RCDC and shear wall designRCDC or ETABS does not correctly design L,T,C or E shaped shear wall configuration.Also if shearwall reduce in length in a tall building what is to be done is to be discussed.A standard drawings for SW elevations is added to the standard drawings library.THANK YOU!