摘要
采用三维二十节点等参单元,整体式有限元模型(将FRP筋分布到混凝土单元中),对集中荷载作用下FRP筋混凝土双向板的开裂及极限冲切承载力进行了非线性数值分析.混凝土材料的本构关系采用非线性弹性理论中的全量E-ν型,破坏准则选取改进的Ottosen四参数公式,裂缝模型选取弥散裂缝模型.经过以上处理,编制了有限元分析程序.程序计算结果与实验数据的比较表明:计算结果与试验值符合良好,分析过程合理,选用合理的材料本构模型、破坏准则和裂缝模型,利用本文程序可以较好地模拟FRP筋混凝土双向板的试验过程.
Based on the 3D 20-node isoparametric element and integral finite element model, the nonlinear finite element analysis of the cracking and punching shear capacity of FRP rebar reinforced concrete two-ways slab subjected to concentrated load is carried out. E-v full dose model in the nonlinear elastic theory for the concrete constitutive relation, is adopted. Improved Ottosen 4-parameter formula for the concrete failure criterion and the smeared crack model are adopted when compiling the FEM program. The comparative results show that the nonlinear finite element analysis results correspond with experimental data well, and the FEM program proposed can effectively simulate the test process of FRP rebar reinforced concrete two-ways slab.
出处
《三峡大学学报（自然科学版）》
CAS
2011年第2期40-43,共4页
Journal of China Three Gorges University：Natural Sciences
基金
国家自然科学基金(50879082)
关键词
FRP筋
混凝土双向板
非线性数值模拟
程序设计
FRP rebar
concrete two-way slab
nonlinear numerical simulation
FEM program design
