海南省政府办公楼超限结构静力弹塑性分析

Ultra-limit Structure Pushover Analysis of Hainan Province Government Building

海南省政府办公楼工程平面选型复杂,楼层平面刚度变化急剧,各层楼板开洞面积和有效楼板宽度指标均超出现行规范规定值,属于典型的平面特别不规则的超限高层建筑结构.笔者对该工程结构进行了罕遇地震作用下结构的静力弹塑性计算分析,结果表明:在罕遇地震作用下结构的变形验算满足规范要求,结构具有较好的承载和抗倒塌能力,能够满足大震下不倒的性能指标.文中着重对PUSH-OVER的分析方法、模型及计算结果等进行了深入分析和阐述,并对工程进行了结构整体抗震性能和局部性能评价;通过弹塑性静力分析计算,找出结构潜在的抗震薄弱部位和薄弱构件,并提出相应抗震加强措施,可供同类工程设计参考.

Hainan Province Government Building is a typical plan-abnormity high-rise structure with the complex plan, the sharp stiffness change, and the bigger ratio of hole area versus the floor and the effective floor width than that of standard regulations. Elastic-Plastic Seismic Analysis under rarely giant earthquake was used for the main structure. The analytical results showed that the structure fits for the demand of strength and deformation in rare earthquake, and the structure has good bearing and anti-collapse ability under the rarely giant earthquake.In the paper, the analysis method of PUSH-OVER, model and calculation results were elucidated and discussed mainly and the seismic performance of whole structure and particle structure were evaluated. Based on the analysis results of static elastic-plastic, the potential weak parts were found and the anti-seismic strengthening measure were proposed as the reference of similar projects design.