摘要
为在网壳结构强震分析中考虑材料损伤累积及裂纹效应的影响,编制了通用有限元软件ABAQUS的用户材料子程序,通过标准子程序验证表明具有较高的计算精度.应用该程序对网壳结构在地震下的典型算例进行了对比分析,表明子程序具有较好的收敛性能,实现了考虑钢材损伤累积的有限元分析方法.应用该程序,并结合基于响应的动力全过程分析方法,对网壳结构在强震下的响应进行了参数研究,考察了结构失效时刻的特征响应.通过是否考虑材料损伤累积的对比表明,考虑这个因素对失效时刻的塑性发展影响不大,但可能明显降低结构的失效极限荷载,需要在分析中予以重视.
The user material subroutine of ABAQUS cumulation and crack effect in analyses of reticulated was compiled to consider the influence of material damage shells under severe earthquakes. The calculating precision was proved by standard test on the subroutine. The comparison of typical examples of reticulated shells subjected to earthquake motions was carried out by applying the user subroutine, which showed the excellent convergence performance, and the finite -element analyzing method with the consideration of damage cumulation was achieved. Using this subroutine, responses of reticulated shells with different parameters under severe earthquakes were studied and characteristic responses at the structural failure time were discussed as well. The comparison, with and without consideration of damage cumulation, indicates that considering this factor has little influence on the plastic development at the failure time, however, it decreases the structural failure limit load obviously, which needs the recognition in the analysis.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2008年第2期169-173,共5页
Journal of Harbin Institute of Technology
基金
国家自然科学基金重点资助项目(50338010)
国家自然科学基金重大研究计划重点资助项目(90715034)
哈尔滨工业大学优秀青年教师培养计划资助(HITQN-JS.2007.029)
关键词
网壳结构
地震作用
损伤累积
动力强度破坏
reticulated shells
earthquakes
damage cumulation
dynamic strength failure
作者简介
支旭东（1977-），男，博士.E—mail：zhixudong@hit．edu．cn
范峰（1971-），男，教授，博士生导师.
沈世钊（1933-），男，博士生导师，中国工程院院士．
