摘要
第五代《中国地震动参数区划图》(GB 18306-2015)下,湖南地区原有非抗震设防区域均改变为抗震设防区域。采用现行规范和抗震要求复核,这些地区既有建筑普遍存在抗震能力低,缺少抗震构造措施的情况。通过对湖南株洲某酒店改造为妇幼保健计划生育服务中心项目的介绍,说明了既有非抗震设防建筑改造加固为重点设防类建筑的措施方法。并在此基础上,引入基于性能的抗震评估方法,给出既有建筑抗震设防性能目标及性能指标的量化标准,进行结构大震弹塑性动力分析,对结构改造加固前后的大震性能进行对比。分析结果表明,改造加固前结构不满足规范和抗震性能目标要求,大震下可能发生严重破坏或倒塌,加固后结构的抗震性能得到极大改善.满足规范和预定性能目标要求,结构抗震能力显著提高。
According to the fifth generation Seismic ground motion parameter zonation hap of China(GB 18306—2015),original non-seismic regions of Hunan province all change to seismic regions.Anti-seismic capacity is generally poor and seismic constructional measures are also lacking by using the current codes and seismic fortification requirements to recheck the existing buildings in these regions.By illustrating the project of a hotel converted into Maternal and Child Health Care and Family Planning Service Center in Zhuzhou,Hunan province,the methods and measures of non-seismic building converted into key protection class building were introduced.On this basis,the performance-based seismic evaluation method was introduced,and the seismic performance objectives and the quantity of performance indices were presented.Dynamic elastic-plastic time history analysis under the large earthquake were carried out and the large earthquake performance of the structure before and after reconstruction and reinforcement were compared.Analysis results show that the original structure does not meet the codes and seismic performance objectives.It may collapse in the large earthquake.The seismic performance of the strengthened structure is greatly improved and can meet the current cods and seismic performance objectives.
作者
王四清
陈宇
艾辉军
毛土明
曹建锋
WANG Siqing;CHEN Yu;AI Huijun;MAO Turning;CAO Jianfeng(Hunan Architectural Design Institute Limited Company,Changsha 410006,China)
出处
《建筑结构》
CSCD
北大核心
2020年第21期60-65,83,共7页
Building Structure
基金
湖南省科技计划项目:湖南省社会发展领域重点研发项目(2017SK2260)。
关键词
既有建筑
抗震加固
屈曲约束支撑
弹塑性时程分析
抗震性能评估
existing building
seismic strengthening
buckling restrained brace
dynamic elastic-plastic time history analysis
seismic performance evaluation
