SAUSAGE在超高层建筑结构罕遇地震弹塑性时程分析中的应用研究

Application of SAUSAGE in elasto-plastic time-history analysis of a super high-rise building structure under rare earthquake

为评价某8度抗震设防区一超高层剪力墙住宅结构的大震安全性,利用广州数力开发的SAUSAGE软件对其进行大震弹塑性分析。针对超高层建筑结构弹塑性精细有限元分析中自由度庞大、分析耗时的问题,介绍了SAUSAGE在分析超大自由度、高度非线性有限元问题的原理及其优势。超高层结构在高烈度区大震下极易进入深度塑性状态,SAUSAGE有效的弹塑性时程分析体现了该结构的薄弱环节及破坏特征,揭露了利用精细有限元法分析超高层结构在大震下的一些破坏形态,为结构设计师提供了有力的设计依据,也初步表明SAUSAGE具有强大的弹塑性分析功能及广泛的应用前景。

To evaluate rare-earthquake safety of a super high-rise shear-wall residential building structure in region of 8-degree of seismic precautionary intensity, the SAUSAGE software developed by Guangzhou Scientific Computing Consultants Co., Ltd. was applied in the structure 's elasto-plastic time-history analysis under excitation of rare earthquakes. In view of solving problems with huge degrees of freedoms( DOFs) and time-consuming analysis caused by elasto-plastic fined finite element analysis( FEA) of super high-rise structures,theorem and advantages of SAUSAGE in managing enormous DOFs and high nonlinearity were introduced. Under rare earthquakes in zone of high seismic precautionary intensity,super high-rise structures would be easily turned to deep plastic. In solving this problem,efficient and effective elasto-plastic time-history analysis by SAUSAGE discovered the structure's vulnerable zone and revealed its failure characteristics,thus reflects some failure states of super high-rise structure under rare earthquake with FEA. The analysis here provides structural engineers helpful design guidance,and also preliminarily indicates SAUSAGE's powerful elasto-plastic analysis feature and widespread application prospect.