【摘要】 在高强混凝土墩柱中配置高强度约束箍筋可有效提高其抗震能力,本文发展了适用于高强箍筋高强混凝土墩柱滞回性能模拟的弯剪数值分析模型。在普通钢筋混凝土墩柱弯剪数值分析模型的基础上,对22个具有典型弯剪破坏特征的高强箍筋高强混凝土柱试验结果进行分析,验证了Elwood剪切破坏面对高强箍筋高强混凝土墩柱的适用性。基于Open Sees数值分析平台建立了墩柱的弯剪数值分析模型,使用Elwood剪切破坏面监测墩柱的剪切破坏时刻。模拟了6个发生弯剪破坏的高强箍筋高强混凝土墩柱滞回曲线,并与试验结果进行对比。结果表明,模拟滞回曲线与试验结果吻合良好,数值模型对高强箍筋高强混凝土墩柱的强度、变形能力、残余位移等具有较好的模拟精度。模拟得到的弯曲、剪切及纵筋拔出等各变形成分也与试件的弯剪破坏特征吻合。更多还原

【Abstract】 The seismic performance of high strength concrete( HSC) columns could be improved by using high strength stirrups( HSS). A flexure-shear analysis model to simulate the hysteretic behavior of HSC columns using HSS was developed. Based on the flexure-shear analysis model for columns with normal strength concrete and stirrups,an analysis was conducted for 22 test results of HSC columns using HSS failed in flexure-shear modes. And applicability of Elwood shear failure surface for HSC columns using HSS was verified. The flexure-shear analysis model for columns was built on the basis of Open Sees platform,in which the shear failure of HSC columns using HSS was monitored by Elwood shear failure surface. 6 HSC columns with HSS appearing flexure-shear failure mode were modeled,and the simulated hysteretic curves were compared with test results. It is found that the simulated hysteretic curves agreed well with test results. The flexure-shear analysis model has a high accuracy for HSC columns with HSS in modeling strength,deformation capacity and residual displacement. The simulated flexure,shear and longitudinal bar slip displacement components of the columns agreed well with the flexure-shear failure mode of the specimens.更多还原