单层球面网壳的抗震性能分析

网壳结构抗震性能分析是网壳抗震领域研究的重要内容,其进展可大大深化人们对现有结构在地震作用下可能发生破坏的认识,同时也会为进一步的机理研究及抗震设计打下坚实的基础.鉴于以上原因,以抗震问题相对突出的单层球面网壳为研究对象,通过数值方法模拟网壳在强震下的动力响应,对结构抗震性能展开了深入细致的研究.采用了当前国际通用的大型有限元软件ABAQUS,通过变换矢跨比、屋面质量、杆件截面、初始缺陷及地震输入等参数进行了大规模的计算,在对临界荷载、破坏模式等性能指标进行统计分析的基础上得出了矢跨比是网壳抗震性能最重要的影响因素等一系列有意义的结论,加深了现有对网壳结构抗震性能的认识.

Study on the aseismic performance of single-layer reticulated domes

The study on aseimic performance of reticulated shells forms a major part in the anti-seismic investigation of such structures.It greatly deepens the comprehension of possible structural damages in earthquakes,and also provides a base for further mechanism study and practical design.Focusing on single-layer reticulated domes,which are more likely to fail in earthquakes,the authors simulated the dynamic responses of structures under severe earthquakes by numerical methods,and carried out comprehensive and detailed investigation about their aseismic performance.By the world-famous finite element software ABAQUS,lots of parametric studies were taken through changing f/L ratio,roof mass,member sections and earthquake inputs.Based on the statistics and analysis of such indices as critical loads and failure modes,some valuable conclusions and the significant role of f/L ratio in anti-seismic performance for instance are obtained,and the comprehension in this field is pushed forward.