针对超限高层剪力墙中震拉应力问题的工程实践  

Engineering Method for Tensile Stress Problems under Precautionary Seismic Intensity in Shear Walls of Tall Buildings Beyond Code-specification

作　　者：杨东全[1] 朱嘉[1] 张宏斌[1] 赵联桢[1] YANG Dongquan ZHU Jia ZHANG Hongbin ZHAO Lianzhen(College of Civil Engineering, Hainan University, Haikou 570228, Chin)

机构地区：[1]海南大学土木建筑工程学院,海口570228

出　　处：《结构工程师》2016年第4期147-153,共7页Structural Engineers

摘　　要：水平地震作用会对高层结构的底部竖向构件产生轴向拉压作用。在高烈度地区,对超限高层建筑进行中震不屈服计算时,这种作用可引起结构底部某些剪力墙墙肢的拉应力,该拉应力可能大于混凝土抗拉强度标准值。在进行超限高层抗震专项审查时,按照《超限高层建筑工程抗震设防专项审查技术要点》的要求,剪力墙构件需满足中震不屈服墙肢平均拉应力不超过2倍混凝土抗拉强度标准值的要求。基于高烈度地区的超限高层设计实践,讨论了中震计算方法;论述了剪力墙拉应力与受剪承载力的关系;阐述了墙体中震拉应力的工程计算方法;最后,给出了中震拉应力不满足要求时的一种工程处理方法。Horizontal earthquake causes axial tension and compression in vertical members located in the bottom of tall buildings. Tensile stress, in bottom shear walls of tall buildings beyond code-specification, could be produced due to earthquake in high seismic intensity area, when performing unyielding computations for seismic precautionary intensity design. This tensile stress may be greater than the tensile strength of concrete. According to the requirement of specified seismic examination for such buildings, the tensile stress in shear walls should not exceed twice the tensile strength of concrete. In this paper, based on the design practice of tall buildings in high seismic intensity, the computing method is discussed for precautionary intensity earthquake; the relationship between tensile stress and shear resistance for shear walls is analyzed;the calculation method of tensile stress in shear walls is described for engineering purpose. Finally, the method to meet the demand of tensile stress in engineering is also considered.

关 键 词：超限高层 剪力墙 中震不屈服设计 墙肢平均拉应力 墙肢受剪承载力 

分 类 号：TU973.16[建筑科学—结构工程]