冻融损伤低矮RC剪力墙数值模拟方法

出于冻融环境下RC剪力墙结构抗震性能评估的需要，通过理论分析与试验回归相结合的方法对8榀冻融损伤低矮RC剪力墙拟静力试验结果进行分析，得到了综合考虑冻融损伤参数和轴压比影响的低矮RC剪力墙剪切恢复力模型，进而提出了考虑不均匀冻融损伤分布组合剪切效应的低矮RC剪力墙数值模拟方法。通过模拟结果与试验结果对比发现：采用该模拟方法得到各试件的滞回曲线、骨架曲线以及最终破坏时的累积耗能均与试验结果符合较好，表明该文所提出的数值模拟方法可较为准确地反映冻融损伤低矮RC剪力墙的力学性能和抗震性能，可用于严寒地区在役RC剪力墙结构的抗震性能评估。

NUMERICAL SIMULATION OF SQUAT RC SHEAR WALLS WITH FREEZE-THAW DAMAGE

This study evaluated the seismic performance of RC shear walls under freezing and thawing environment.The results of the quasi-static tests of eight freeze-thaw damage squat RC shear walls were analyzed by using theoretical analysis and experimental regression.A shear hysteresis model of a squat RC shear wall was proposed considering the degree of freeze-thaw damage and the axial load ratio.Subsequently,a numerical simulation method of the squat RC shear wall was put forward considering the combined shear effect and uneven freeze-thaw damage.Comparing the simulation results with the experimental results,it is found that the hysteresis curve,the skeleton curve,and the cumulative energy dissipation were in good agreement with the experimental results,which indicated that the numerical simulation method proposed in this paper can accurately reflect the mechanical properties and seismic performance of squat RC shear walls with freeze-thaw damage,and can be used for seismic performance evaluation of in-service RC shear walls in frost action regions.