某工程超高剪力墙结构性能化设计及损伤分析

Performance based design and damage analysis of super high shear wall structure in a project

某工程房屋高度147.950 m,接近B级高度,扭转位移比大于1.2的超限高层项目,同时存在X向短墙肢较多,避难层大开洞,墙肢截面收进等不利情况。通过多种手段进行计算分析,基于性能的抗震设计方法,对结构及构件进行了静力弹性以及动力弹塑性时程分析,提出了相应的加强措施。对弹塑性损伤进行分析判断并提出了刚度渐变原则进行截面突变优化的方案。

A building is 147.950 m,which was close to the limit of level B required by JGJ 3—2010 in China,and the torsional displacement ratio greater than 1.2.The construction also has some adverse condition such as many short-leg shear wall in X direction,many floor hole in refuge storey and shear wall with variable cross-section.Through a variety of calculation and analysis method and the seismic design method based on the performance,static flexibility and dynamic elastic-plastic time history analysis were applied to analyze the structure model,then some seismic strengthening measuers were applied to the sturcture.Through an analysis about elastic-plastic damage,reducing the range of stiffness mutation was proposed to reduce the effects of elastic-plastic damage.