混凝土直接剪切试验的非线性有限元分析  

Nonlinear finite element analysis of reinforced concrete direct-shear tests

作　　者：李翠[1] 车轶[1] 仲伟秋[1] 

机构地区：[1]大连理工大学建设工程学部,辽宁大连116024

出　　处：《四川建筑科学研究》2011年第3期8-10,25,共4页Sichuan Building Science

基　　金：国家自然科学基金项目(50778034)

摘　　要：在一组钢筋混凝土Z型试件直接剪切试验的基础上,采用有限元通用程序DIANA,对其受力过程和破坏机理进行模拟分析,并与试验结果进行对比,验证了弥散裂缝模型也适用于破坏时只有少量主要裂缝的情况,并对基于弥散裂缝概念的旋转裂缝模型、固定裂缝模型和多方向固定裂缝模型进行比较,给出了剪切荷载作用下混凝土开裂模型的选取建议,可供类似的钢筋混凝土有限元分析参考。A group of ＂Z＂ type push-off specimens have been carried out are simulated by using the finite element analysis software DIANA in this article.The analysis focuses on the shear transfer and failure mechanism of the specimens.The simulation results are compared with the experiment ones,which verify that the smeared crack model also apply to the study of the problems involving the progression of the few cracks.Simultaneously the comparative analysis among the rotating crack model,fixed crack model and multi-directional fixed crack model is done,and some suggestions about choosing the crack model of the reinforced concrete under the shear load are given,hoping be helpful for the scholars in this field.

关 键 词：DIANA Z型试件 裂缝模型 有限元分析 

分 类 号：TU375[建筑科学—结构工程]