钢纤维混凝土叠合梁非线性有限元分析及破坏过程的计算机仿真  

Nonlinear FEM Analysis of Steel Fiber Reinforced Concrete Composite Beam and the Computer Simulation of the Entire Failing Process

作　　者：蒋玉川[1] 徐双武[1] 黄陆海[1] 

机构地区：[1]四川大学建筑与环境学院,四川成都610065

出　　处：《四川大学学报（工程科学版）》2010年第1期80-86,共7页Journal of Sichuan University (Engineering Science Edition)

基　　金：教育部博士点基金资助项目(200806100042)

摘　　要：在试验研究的基础上,通过分析叠合梁二次成型、二次受力的过程,考虑材料非线性,运用V-F语言编制了钢纤维混凝土叠合梁非线性有限元计算程序,对钢纤维混凝土叠合梁从加载→开裂→破坏的全过程进行了数值模拟。将计算结果与实验结果作对比,二者吻合较好。同时,对掺入钢纤维后叠合梁的受力特性进行了研究。结果表明:随着钢钎维含量的提高有效的阻止了裂纹开展的程度,并能减缓受拉钢筋应力超前的现象。最后,通过构造DXF格式的图形转换文件,对钢纤维叠合梁的破坏过程实现了部分计算机仿真。Based on experimental study, through the analysis of composite beam＇ s the second moIding and the sec- ond stage force, and considering the ownlinearity of material, nonlinear finite element program for steel fiber rein- forced concrete（SFSC） composite beams was compiled with Viusal-Fortran language. By using the program, the entire failing process of the steel fiber reinforced concrete （SFSC） composite beams was simulated from initial loading, cracking, yielding to failing. The stimulation results corresponded well to the experiment results by contrast calculation results with experimental results. Meanwhile, the mechanical behavior of steel fiber reinforced concrete （SFSC） composite beam after the introduction of steel fiber was studied. The results indicated that steel fiber can remarkably resist crack propagation extent with the increment of the steel fiber,content, and it can reduce the phenomenon of tensile steel stress increasing rapidly for composite beam. Finally, by constructing DXF format graphics conversion file, the program can partially realize computer simulation for entire failing process of fiber reinforce concrete composite beam.

关 键 词：钢纤维混凝土 叠合梁 非线性有限元 DXF 计算机仿真 

分 类 号：TU377[建筑科学—结构工程]