机构地区: 广西大学土木建筑工程学院工程防灾与结构安全教育部重点实验室
出 处: 《工业建筑》 2010年第3期52-59,共8页
摘 要: 通过对弹性补偿有限元法的改进,提出可考虑恒荷载和活荷载同时作用的结构塑性极限分析方法。该方法利用弹性补偿有限元法采用迭代法进行极限分析的特点,在活荷载比例加载逼近极限荷载的同时,保持恒荷载作用效应不变,得到考虑恒荷载作用效应的工程结构极限承载力。典型算例的对比分析和影响因素研究表明,算法分析结果是收敛的、准确的和稳定的。 This paper deals with the limit analysis of structure system under the combined action of constant loadings and live loadings. An efficient algorithm based on the elastic compensation finite element method ( ECFEM),is presented,in which the action of constant loadings to limit analysis is considered. In the algorithm,the iteration process of ECFEM is improved,which keeps the action of constant loadings unchanged while acquires the result of limit analysis. Contrastive analysis of some classical examples and analysis of influence factors show that the results using the algorithm are convergent,accurate and stabilizing.