摘要
目的研究结构体系简化分析对震区高层结构地震反应的影响,为震区高层结构体系地震风险性分析提供理论支持.方法针对高层结构体系布置特点,对顶部局部突出塔楼,底部多层裙房及楼梯整体参与受力的影响进行整体受力分析,依据有限元技术预估承灾体系在地震作用下的承载能力及其影响权重.结果针对3类结构体系的简化分析,得出塔楼简化及设置后浇带的裙房对结构整体地震反应指标误差均在3%以内;楼梯的参与对结构整体刚度较大的体系的动力反应影响较大,最大误差可达43%.结论结构体系的承灾能力在地震危险性评估中不可忽略,其不同程度的简化分析对主体结构地震反应有重要的影响,三种情况的简化分析结果说明了在其非线性分析时应给予充分重视,为震区陆续开展的结构地震风险性评估提供技术保障.
The paper aims to study effect of simplified structure system analysis on the seismic response of high - rise buildings at seismic zone, so as to provide the basic theoretical support for the seismic risk analysis of such tall buildings in Chinese cities. Typical tall buildings, considered the effect of local outstanding parts on the top of buildings, podium structure and the interaction of stairs, are mainly discussed with FEM in the paper in order to precast the bearing capacity of such structures and obtain the effect weight under the future possible earthquake action. The paper obtains that simplification on the structural system with local outstanding parts or podium structure has no obvious effect on the main structure and the error is within 3%.The interaction of stairs, however, has much effect on the dynamical performance of main structure and the maximum error reaches 43 %. Through the data analysis on practical examples, the paper gets the conclusions that the simplification to structural system has different effect on the dynamical performance, especially on the load capacity and deformation behavior of main structures. The conclusions are instructive to the seismic risk evaluation of high - rise buildings at seismic zone.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2010年第4期657-664,共8页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(50978238)
中国地震局工程力学研究所基本科研业务专项资金(2007A02)
关键词
高层结构
结构简化
地震反应
地震风险分析
tall building
structural simplification
seismic performance
seismic risk analysis
