以轴压比为主要参数, 进行了8个圆钢管混凝土构件滞回性能的试验研究。采用数值方法计算了圆钢管混凝土构件的弯矩—曲率及水平荷载—水平位移滞回关系曲线, 理论计算结果与试验结果吻合较好。在系统考察了轴压比、长细比、含钢率、钢材屈服强度和混凝土强度等参数对圆钢管混凝土构件滞回曲线骨架线影响规律的基础上, 提出了弯矩—曲率和水平荷载—水平位移滞回关系模型以及位移延性系数的简化确定方法。
Abstract
The hysteretic behaviors of eight beam-columns of concrete-filled circular steel tubes are experimentally investigated in this paper, and the main parameter is axial load level.Relation curves of the moment versus curvature and the lateral load versus lateral displacement of concrete-filled circular steel members are calculated by using numerical method, and the calculating results agree well with experimental results.Based on the investigations for influence of several parameters on hysteretic curves of circular steel tubes, such as, the axial load level, slenderness ratio, steel ratio, strength of the materials, etc, hysteretic models for the moment versus curvature relationship, the lateral load versus lateral displacement relationship and simplified formula of ductility coefficient are suggested.
关键词
桥梁工程 /
滞回性能 /
试验研究 /
钢管混凝土压弯构件 /
滞回模型 /
延性
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Key words
bridge engineering /
hysteretic behavior /
experimental research /
beam column of concrete-filled steel tube /
hysteretic model /
ductility
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中图分类号：
U441
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参考文献
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脚注
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基金
福建省科技计划重大项目(2002H007):国家建设部科学计划项目(04-2-151)
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