摘要
广东《高规》采用“二阶段、二水准”抗震性能化设计方法,基于设防烈度地震进行构件抗震承载力计算,与行标《高规》抗震设计方法有一定区别。分别基于广东《高规》与行标《高规》各自的规定,对某超高层塔楼进行结构设计。对两个标准下塔楼的整体指标计算结果进行对比分析,从计算参数、设计方法、反应谱等方面揭露了数据差异的原因;比较了两个标准下塔楼的大震弹塑性性能和屈服机制,并基于“R-μ”规律从延性系数角度对二者的安全度进行了评估。结果表明,广东《高规》和行标《高规》均有足够的安全储备经受大震考验。总体上,采用广东《高规》设计的塔楼混凝土及钢筋的材料用量更少、建筑利用率更高,基于“R-μ”的性能设计思想概念更为直接。
The“two-stage,two-level”seismic performance design method is adopted in Guangdong provincial standard Technical specification for concrete structures of tall building(Guangdong standard),and the seismic bearing capacity of components is calculated based on the fortification intensity earthquake,which is different from the seismic design method of industrial standard Technical specification for concrete structures of tall building(industrial standard).Based on the respective regulations of Guangdong standard and the industrial standard,the structural design of a super high-rise tower was carried out.The overall index calculation results of the towers under the two standards were compared and analyzed,and the reasons for the differences in the data were revealed from the aspects of calculation parameters,design methods,and response spectra.The large earthquake elastic-plastic performance and yield mechanism of the towers under the two standards were compared,and based on the“R-μ”law,the safety of the two standard was evaluated from the perspective of ductility coefficient.The results show that both have sufficient safety reserves to withstand the test of large earthquakes.On the whole,the concrete and steel bars of the tower designed by Guangdong standard have less material consumption and higher building utilization rate,and the performance design concept based on“R-μ”is more direct.
作者
徐平辉
倪取佳
温沛纲
XU Pinghui;NI Qujia;WEN Peigang(Guangzhou BXHH Architects&Engineers Ltd.,Guangzhou 510030,China;Poly South China Holdings Co.,Ltd.,Foshan 528200,China)
出处
《建筑结构》
北大核心
2023年第19期134-143,共10页
Building Structure
关键词
规范标准
工程抗震
屈服机制
性能化设计
延性系数
code and standard
earthquake resistant engineering
yield mechanism
performance-based design
ductility coefficient
