摘要
超高层建筑中,连梁往往是地震作用下结构破坏的第一道防线,起到耗散地震能量的作用,是结构塑性耗能的关键构件。在超高层建筑设计时,往往会遇到部分连梁抗剪截面无法满足要求的情况。以往工程设计时,针对连梁抗剪截面不足这一情况往往通过内置型钢钢骨解决。但由于连梁内置型钢钢骨往往使得连梁抗弯强度亦大幅增高,这对连梁的破坏形态以及整体结构的分析结果均会有较大影响。以某超高层建筑为例,采用静力弹塑性截面分析程序以及三维结构非线性分析与性能评价软件PERFORM-3D对超高层结构罕遇地震下连梁的破坏机理展开了详细的研究,并提出了针对连梁抗剪截面不足问题的解决方法。
Connection beams are the first line defense system in super high-rise buildings against earth-quakes. They are the key inelastic energy dissipation components because of their ability of dissipating earth-quake energy. In super high-rise building design, there are sometimes problems with connection beam shear capacity. Usually, ＂ Ⅰ＂ shape steel are added into the reinforced concrete beam. However, this additional steel reinforcement also increases the connection beam bending capacity. It therefore affects connection beam failure mode and analysis of an entire structural system. In this paper, based on the PERFORM-3D, connec-tion beams in a super high-rise building were studied for damage mechanism under rarely occured earth-quakes. Based on the results, a solution to solve the poor shear capacity of the connection beam was proposed.
出处
《结构工程师》
北大核心
2013年第3期16-22,共7页
Structural Engineers
关键词
超高层建筑
连梁
弹塑性时程分析
PERFORM-3D
super high-rise building, coupling beam, elastic-plastic time-history analysis, PERFORM-3D
