内置钢板钢筋混凝土剪力墙非线性仿真研究

Computational simulation of nonlinearity of steel plate reinforced concrete shear walls

DIANA(DIsplacement method ANAlyser)是一种研究混凝土结构能力较强的有限元分析软件,尤其适用于结构非线性分析。选择合适的模型和本构关系,采用DIANA,对反复荷载作用下内置钢板钢筋混凝土剪力墙受力性能进行数值分析。比较数值模拟结果与试验实测结果可知,DIANA能够较好地模拟构件峰值荷载点之前的滞回特性;就轴压比、混凝土强度等级等参数对于墙体抗震性能的影响进行了讨论,结果表明DIANA仿真模拟与试验结果吻合较好。针对数值仿真中存在的未考虑钢板与混凝土的粘结滑移、网格划分精度等问题,提出了合理精度的网格划分与几何非线性计算相结合的建议,可以较好地模拟钢板的局部屈曲。

In this paper, a software package called DIANA （ Displacement method ANAlyser）, chosen for its powerful capabilities to analyze reinforced concrete problems, is used to solve nonlinear problems by means of finite element method. A set of element models and constitutive formulations were defined to build up the specimen models under both axial compression and cyclic loading for performance of steel plate reinforced concrete shear walls. The model was validated through a comprehensive verification study where results obtained from the model were compared to test results, in the form of hysteretic curves. It is found that the model is capable of simulating pre-peak strength stages, but slightly deviates in post-peak strength cycles. Parametric analysis was also carried out for the compressive ratio and concrete strength value and the results agreed well with test results. In order to make better simulation to behavior of local buckling in steel plate, issues related to simulation of the bond-slip performance between steel plate and concrete, element meshing, etc. are discussed which can provide reference for DIANA application in civil engineering in China.