弹性结构设计下的单层工业厂房的抗震性能

SEISMIC PERFORMANCES OF SINGLE-STORY INDUSTRIAL FACTORY BUILDINGS UNDER ELASTIC STRUCTURE DESIGN

编制中的《工业建筑抗震设计标准》将结构类别划分为塑性结构、弹塑性结构及弹性结构三大类,并提出各类别所采用的结构性能系数q,来对地震效应组合进行调整。对于弹性结构,其提出可采用结构性能系数q=2.0、q_(h)=2.5进行抗震计算。以既存的单层的单、多跨排架结构的工业厂房为例,按弹性结构考虑,采用改进后的PKPM软件建立平面计算模型,分别在各设防烈度下进行地震作用效应的计算。以柱应力比首次超过1.0时的设防烈度,进行该烈度下的结构罕遇地震弹塑性时程分析。明确了单层工业厂房在满足弹性结构设计要求的前提下,在罕遇地震中不会发生倒塌破坏。

Standard for Seismic Design of Industrial Buildings is being compiled,in which the structural categories are divided into three categories:plastic structure,elastic-plastic structure and elastic structure.Moreover,the structural performance coefficient q used in all kinds of types is proposed to adjust the seismic effect combination.For elastic structures,it is proposed that the performance coefficient q=2.0 and q_(h)=2.5 can be used for seismic calculation.In this study,the existing single-story single-span and multi-span bent structure were taken as examples and considered as elastic structure,the plane calculation model was established by using the improved PKPM software.The seismic effect was calculated under different fortification intensities.Under the intensity when the stress ratio of the column exceeded 1.0 for the first time,the elastic-plastic time history analysis of large earthquakes was carried out.It was clarified that the single-story industrial factory building would not collapse in large earthquakes on the premise of meeting the requirements of elastic structure design.