高性能塑性铰RC墩柱损伤发展的数值模拟分析

Numerical Simulation Analysis of Damage Development of RC Bridge Piers with High Performance Plastic Hinges

为探究高性能塑性铰(HPH)钢筋混凝土(RC)墩柱(HPHRC墩柱)的损伤发展,基于该墩柱的伪静力试验相关数据,通过数值模拟分析了HPHRC墩柱在低周往复加载下关键部件的损伤发展及HPHRC墩柱的总体损伤发展。数值模拟分析表明:HPHRC墩柱在低周往复加载下,钢纤维混凝土(SFRC)壳壁有所损伤,核心区混凝土开裂较为严重,纵向钢筋存在较大塑性应变。需进行优化设计增强墩柱的抗震可恢复功能。

In order to investigate the damage development of RC bridge piers with high performance plastic hinges(HPHRC piers),the damage progression of critical components and the overall damage progression of HPHRC piers under cyclic loading were analyzed by numerical simulation based on the pseudo-static testing data.The numerical simulation results show that under cyclic loading,the precast steel fiber reinforced concrete segments are damaged,and the concrete cracking in the core area of high performance plastic hinges is severe.At the same time,there is a considerable plastic strain in the longitudinal bars.Thus,it is necessary to enhance the seismic resilience of HPHRC piers.