摘要
为研究配置预应力钢板箍(prestressed steel jacket,PSJ)RC墩柱遭受地震破坏后的抗倒塌能力,通过对配置PSJ墩柱进行低周往复加载以模拟震损墩柱,进行7个带PSJ墩柱震损试件的轴压性能试验,研究参数包括钢板箍配箍特征值和箍板预应力度。研究结果表明:配置PSJ对震损墩柱的轴压性能影响显著,震损带PSJ墩柱的抗倒塌能力远比震损无PSJ墩柱的大;在轴压试验过程中,震损带PSJ墩柱的破坏集中在试件中部,呈现轴压试件的典型破坏特征;在竖向荷载作用下,PSJ对震损墩柱仍能提供良好的横向约束,使带PSJ墩柱具有较强的抗倒塌能力;配箍特征值越大,带PSJ墩柱的轴压承载力和变形能力越强;箍板预应力度对震损墩柱的轴压承载力影响较小,但震损墩柱的变形能力随着箍板预应力度的提高而降低。
Seven damage RC piers equipped with prestressed steel jacket（PSJ） were tested under axial compression to investigate the anti-collapse capacity of these damage members under earthquake, and the earthquake damage was stimulated through the low cycle loading. The test parameters included the PSJ amount and prestressing level. The results show that PSJ has a significant influence on the axial compressive performance of the damaged piers, and the anti-collapse capacity of PSJ piers is better. The failure characteristics of damaged PSJ piers under axial compression are almost the same as the typical damage characteristics of normal piers in axial compression test, and the damage mainly occurs at the central height of the pier. PSJ provides good lateral confinement to the piers, and the PSJ piers have good anti-collapse capacity. With the increase of PSJ amount, the bearing capacity and deformation capacity of retrofit of the PSJ retrofit piers increase. The prestressing level of PSJ has few influence on the axial bearing capacity, but the deformation ability of damaged PSJ piers reduces with the improvement of prestressing level.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第3期953-958,共6页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51578254
51208219)
福建省科技计划项目(2015Y4007
2014J05061)~~
关键词
RC墩柱
预应力钢板箍
震损
轴压性能
抗倒塌能力
RC circular piers
prestressed steel jacket（PSJ）
earthquake damage
axial compression behavior
anti-collapse capacity
