压区粘钢加固钢筋混凝土梁的ANSYS分析

THE ANALYSIS OF REINFORCED CONCRETE BEAMS STRENGTHENED WITH BONDED STEEL PLATES IN COMPRESSION ZONE BY ANSYS

借助有限元分析软件ANSYS,对8根压区粘钢加固钢筋混凝土梁进行非线性有限元建模与分析。分析中考虑材料非线性以及混凝土的开裂与压碎。对单元类型的选取、材料模型的定义、整体有限元模型的建立、施加荷载、设置求解选项并求解等数值模拟技术进行了研究。计算结果与试验吻合良好。研究表明,通过合理设置参数,可以利用有限元建模对压区粘钢加固试件的受力进行模拟。

The nonlinear finite element analysis of eight concrete beams with steel-bonded reinforcement in compressed zone is performed by the finite element software ANSYS.The effects of material nonlinear constitutive relations and concrete cracking and crushing are all taken into account.A series of numerical simulation technologies are introduced,such as selecting element type,defining material models of steel and concrete,establishing global finite element model with discrete reinforced bar elements and stirrup elements,applying loads to the specimens,setting solution control options and solving.The analytical results agree well with experimental ones.The investigation shows that ANSYS finite element software may simulate the behavior of concrete beams with steel-bonded reinforcement in compressed zone under static loading through reasonably selecting parameters.