保护层厚度对钢筋混凝土等肢异形柱延性性能的影响  

Effect of concrete casing thickness on ductility of equi-limb specially shaped columns

作　　者：宋家璐[1] 张翼[1] 张新培[1] 高少波[1] 

机构地区：[1]四川大学建筑与环境学院,四川成都610065

出　　处：《世界地震工程》2009年第1期131-137,共7页World Earthquake Engineering

摘　　要：采用非线性全过程数值计算方法,计算并分析了不同保护层厚度的L形、T形和十字形钢筋混凝土等肢异形柱在多种工况下的截面曲率延性值,发现了保护层厚度对混凝土等肢异形柱的截面曲率延性有重要的影响,进而提出了不同保护层厚度的混凝土等肢异形柱在各抗震等级下的轴压比限值的调整及其保护层厚度的控制标准的建议。Based on nonlinear analysis method of complete response process, this paper calculates： and analyses the cross-section curvature ductility of RC equi-limb L-shaped,T-shaped and cross.shaped columns with different con- crete casing thickness under different load conditions. It is found that. the casing thickness has major influence on cross-section curvature ductility ofRC equi-limb specially shaped columns. Then adjustment of limited value of axial compression ratio under different seismic grades and control rule of the concrete casing thickness are proposed.

关 键 词：异形柱 截面曲率延性 保护层厚度 轴压比限值 

分 类 号：TU375.3[建筑科学—结构工程]