钢骨高强混凝土柱的非线性分析

Nonlinear Finite Element Analysis on Steel Reinforced High-Strength Concrete Columns

目的进一步研究钢骨高强混凝土柱的工作性能.方法以有限元理论为基础,运用分析软件(AN SYS)对钢骨高强混凝土柱在单调载荷作用下由混凝土开裂、型钢屈服直至构件破坏的整个受力过程进行数值模拟.结果计算得到的荷载—位移曲线与试验曲线比较一致,当水平荷载达到极限荷载50%左右时,混凝土开裂;水平荷载达到极限荷载的60%左右时,跨中钢骨下翼缘开始屈服.结论采用ANSYS程序中的SOLID65单元、SOLID45单元、LINK8杆单元建立钢骨高强混凝土柱有限元模型并进行计算是可行的.

Nonlinear full-range analysis of steel reinforced high-strength concrete columns is performed by finite element analysis (FEA) software ANSYS, and the crack development of concrete, the yield of steel and the failure of column members are simulated. The result shows that the calculating curve of force-displacement by ANSYS agrees with its experiment, and another stress distribution for steel and concrete under monotone loading in different working stages are analyzed. The concrete begins to crack when horizontal load reaches to 50% of the ultimate load and the bottom flange of mid-span steel begins to yield when the horizontal load reaches to 60% of the ultimate load. So the method is feasible by establishing finite element model with SOLID65 element, SOLID45 element and LINK8 element from ANSYS program.