(1 燕山大学建筑工程与力学学院，秦皇岛 066004；2 绍兴文理学院土木工程学院，绍兴 312000)

［摘要］ 钢筋混凝土承重柱会因地震动的随机性而斜向受力，从而呈现与单向主轴受力时不同的抗震性能。对3个试验轴压比为0.6、剪跨比为4的RC方柱进行了不同加载角度0°，22.5°，45°下的低周往复加载试验，研究了斜向受力下高轴压比RC柱的承载能力、耗能能力、刚度和变形能力等抗震性能。结果表明：斜向受力导致高轴压比RC方柱的正截面承载力降低，滞回环捏拢现象加剧，割线刚度无显著变化，但变形能力增强；各项抗震性能指标随加载角度的变化规律为：正截面承载力与加载角度（0°~45°）呈负相关关系，耗能能力随加载角度的增加先降后升，延性系数则先增后减，以22.5°加载试件耗能能力最差，但延性最好。 

［关键词］钢筋混凝土柱； 斜向受力； 抗震性能； 高轴压比； 加载角度 

中图分类号：TU375-3 文献标识码：A文章编号：1002-848X(2021)12-0056-06

 Seismic performance tests of RC square columns with high axial compression ratio under oblique earthquake ground motion 

SONG  Kun1,  WANG  Wei2 

(1 College of Civil Engineering and Mechanics, Yanshan University，Qinhuangdao 066004， China；2 School of Civil Engineering, Shaoxing University，Shaoxing 312000， China) 

Abstract: The reinforced concrete (RC) columns  subject to oblique force due to the randomness of ground motion, and present different seismic performances compared with unidirectional principal axes. Quasi-static tests under different loading angles 0°,22.5°,45°of three square columns with 0.6 axial compression ratio and 4 shear span ratio were performed, and the seismic performance of bear capacity, energy consumption, stiffness, deformation capacity of RC columns with high axial compression ratio under oblique force were studied. The results show that the oblique force reduces flexural bearing capacity of RC columns with high axial compression ratio, aggravates hysteresis ring pinching phenomenon, effects secant stiffness slightly, but intensifies deformation capacity. The seismic performance indexes vary with the loading angle as follows: the bearing capacity is negatively correlated with the loading angle (0°~45°), the energy dissipation capacity falls first and then rises with the increasing of loading angle, on the contrary, the ductility factor enhances at first and then decreases, and the specimen at 22.5° loading has the worst energy dissipation capacity but the best ductility.  

Keywords:reinforced concrete column； oblique force； seismic performance； high axial compression ratio； loading angle

*国家自然科学基金项目（51508493)，河北省博士后科研项目择优资助项目（B2016005003）。

 作者简介：宋坤，博士，讲师，硕士生导师，Email:songkun_2002@163.com。