江西省博物馆超限结构抗震性能设计

以目前在建的江西省博物馆超限高层建筑为例,结合基于性能的抗震设计理论和方法,根据建筑物的重要性合理确定结构的抗震性能目标及构件在各设防地震烈度下的性能水准。使用PKPM,MIDAS,YJK软件进行多遇地震作用下弹性计算分析、设防地震作用下弹性和不屈服分析,采用SAUSAGE软件进行罕遇地震弹塑性分析。通过弹塑性时程分析方法验算罕遇地震作用下的弹塑性层间位移角等指标是否满足规范要求,并对结构的损伤程度进行分析,确定结构薄弱部位(薄弱层及薄弱构件),根据分析结果提出抗震加强措施以确保结构在各设防烈度下满足预期的抗震性能目标。

Seismic performance design of out-of-code structure for Jiangxi Provincial Museum

Taking the Jiangxi Provincial Museum currently under construction as an example, performance-based seismic design theory and methods were combined to reasonably determine the structure′s seismic performance targets and the performance levels of the components under various seismic fortification intensities according to the importance of the building. PKPM, MIDAS and YJK software were used for elastic calculation analysis under frequent earthquakes, elastic and non-yield analysis under fortification earthquakes, and SAUSAGE software was used for elasto-plastic analysis under rare earthquakes. The elasto-plastic time-history analysis method was used to verify whether the elasto-plastic interlayer displacement angle and other indicators under rare earthquakes meet the requirements of the code, and the damage degree of the structure was analyzed to determine the weak parts of the structure(weak layers and weak components). According to the analysis results, seismic strengthening measures were proposed to ensure that the structure met the expected seismic performance targets under various seismic fortification intensities.