带翼缘剪力墙截面曲率分析及延性的计算  

CURVATURE ANALYSIS AND DUCTILITY CALCULATION OF FLANGED SHEAR WALLS

作　　者：王斌[1,2] 史庆轩[1,2] 蔡文哲[2] WANG Bin;SHI Qing-xuan;CAI Wen-zhe(State Key Laboratory of Green Building in Western China,Xi’an University of Architecture&Technology,Xi’an,Shaanxi 710055,China;School of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an,Shaanxi 710055,China)

机构地区：[1]省部共建西部绿色建筑国家重点实验室/西安建筑科技大学,陕西西安710055 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《工程力学》2019年第12期165-176,共12页Engineering Mechanics

基　　金：国家自然科学基金项目(51808435);中国博士后科学基金面上项目(2018M643594);陕西省自然科学基础研究计划项目(2019JQ199);校人才科技基金项目(RC1811)

摘　　要：通过对非对称截面带翼缘剪力墙的弯矩-曲率分析,分别计算了翼缘受拉和翼缘受压方向的截面屈服曲率和极限曲率,分析了轴压比、纵筋配筋率、腹板竖向分布钢筋配筋率、翼缘宽度与腹板高度比、混凝土强度、配箍特征值、腹板截面高厚比对截面曲率的影响,并结合受压区高度的变化详细阐述了截面曲率随各影响因素的变化规律。通过对4941个工况下计算结果的回归分析,建立了带翼缘剪力墙截面屈服曲率和极限曲率的简化计算公式,并进一步推导了曲率延性和位移延性的计算公式。通过与试验结果的比对,验证了计算公式的准确性。该文公式不仅将翼缘受拉和翼缘受压状态进行了区分,并择取了影响截面曲率的关键因素,可为带翼缘剪力墙的变形能力计算以及基于位移的抗震设计提供依据。Based on the moment-curvature analysis of flanged shear walls with asymmetric cross-sections,the sectional yield curvature and ultimate curvature when the flange is in tension and in compression are calculated.By analyzing the influence of the axial compression ratio,longitudinal reinforcement ratio,web distributed vertical reinforcement ratio,flange width to web height ratio,concrete strength,stirrup characteristic value and web height to thickness ratio on the sectional curvatures,the variation of sectional curvatures with each influential factor is elaborated in detail combined with the change in the depth of the compressive zone.Through a regression analysis of the calculation results under 4941 conditions,simplified formulas for calculating the yield curvature and ultimate curvature of flanged shear walls are established.Formulas for estimating the curvature ductility and displacement ductility are also derived.The accuracy of the calculation formulas is verified by the comparison with the experimental results.The proposed formulas not only distinguish the cases with the flange in tension and the cases with the flange in compression,but also consider the effects of key factors affecting the sectional curvatures.They provide references for the deformation capacity calculation and the displacement-based seismic design of flanged shear walls.

关 键 词：带翼缘剪力墙 弯矩-曲率分析 屈服曲率 极限曲率 延性 简化计算 

分 类 号：TU398.2[建筑科学—结构工程]