钢纤维混凝土结构非线性有限元分析方法研究  

Study on nonlinear finite element analysis of steel fiber concrete structure

作　　者：邱继生[1,2] 

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《混凝土》2011年第3期17-20,24,共5页Concrete

基　　金：国家自然科学基金项目(50908188;50878021);西安科技大学培育基金(2010035)

摘　　要：根据钢纤维混凝土结构的特点,对其非线性有限元分析方法进行了研究。分析中重点解决各材料的本构关系的确定及钢纤维作用的有限元模拟方法两个问题。钢纤维的对结构的影响可以通过修正混凝土的本构关系、单元等效力筋法及整体等效力筋法来实现,其中单元等效力筋法可模拟钢纤维与混凝土间的黏结与滑移,但计算量大且程序不易收敛。此外,将有限元分析结果与已有的试验结果进行了比较,结果表明采用研究确定的有限元分析方法所得的混凝土及钢筋的应力分布、裂缝分布状况及荷载位移曲线与试验结果较接近,精度较高,可为钢纤维混凝土结构受力性能分析研究提供一定的参考。According to the characteristics of steel fiber reinforced concrete structure,its non-linear finite element method were studied.Analysis focused on solving the constitutive relation of the materials and the effect of steel fiber to determine the finite element simulation.The influence of steel fiber on the structure can be taken into account by modifying the constitutive relation of concrete, regarding steel fiber as unit equivalent steel or overall equivalent steel, Unit equivalent steel method can simulate the bond-slip effect between steel fiber and concrete, however, large computation and the convergence process is not easy.In addition, the finite element analysis and existing experimental results were compared, the results show that the use of this finite element analysis to determine the concrete and steel from the stress distribution, fracture distribution and load-deflection curves with the test results close to,which can provide some reference for the performance analysis of steel fiber reinforced concrete structure.

关 键 词：钢纤维混凝土 有限元分析 黏结滑移 等效力筋法 荷载-位移响应 

分 类 号：TU528.572[建筑科学—建筑技术科学]