摘要
框架-核心筒体系是超高层结构的常用结构体系之一。我国规范对框架-核心筒结构设计时的框架剪力做了相关的调整规定,但其在超高层结构中的适用性有待进一步研究。该文对比了中美规范的相关规定,并以一实际超高层建筑为例,改变其剪力调整策略得到新设计方案。并建立新、旧两方案的精细有限元模型,进行了大震弹塑性分析和特大震抗倒塌能力分析。分析结果表明:改变剪力调整策略的新模型设计难度降低,抗大震性能与满足中国规范的原模型相当,且其抗特大震倒塌能力更优。研究结果可以为超高层框架-核心筒结构的设计提供参考。
The frame-core-tube structural system is one of the common structural systems used in supertall buildings.While a shear adjustment regulation for the frame of a frame-core tube structure has been specified in related Chinese codes,its applicability in supertall buildings needs to be further studied.Similar regulations in the codes of China and the United States are compared in this work.Furthermore,based on an actual supertall building,a new design is proposed by changing the shear adjustment strategy.Then the refined finite element(FE)models of both original design and new one are established.And both nonlinear time history analysis(THA)under the maximum considered earthquake(MCE)and earthquake-induced collapse analysis are performed for these two models.The results indicate that:compared with the original design,the new one,whose shear adjustment strategy is different,has a lower design difficulty,a similar aseismic performance under MCE,and a higher anti-collapse resistance.The results can provide a reference for the design of supertall frame-core tube structures.
作者
陆新征
顾栋炼
周建龙
包联进
钱鹏
卢啸
林元庆
LU Xin-zheng;GU Dong-lian;ZHOU Jian-long;BAO Lian-jin;QIAN Peng;LU Xiao;LIN Yuan-qing(Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry,Department of Civil Engineering, Tsinghua University, Beijing 100084, China;East China Architectural Design & Research Institute, Shanghai 200002, China;Shanghai Engineering Research Center of Super High-Rise Building Design, Shanghai 200002, China;School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;China Nuclear Power Engineering Co., Ltd., Zhengzhou Branch, Zhengzhou 450052, China)
出处
《工程力学》
EI
CSCD
北大核心
2019年第1期183-191,215,共10页
Engineering Mechanics
基金
国家重点研发计划项目(2017YFC0702902)
国家自然科学基金项目(51778341)
关键词
超高层建筑
框架-核心筒结构
剪力调整
地震
倒塌
supertall building
frame-core tube structure
shear adjustment
earthquake
collapse
