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通过四种不同双向加载规则的钢筋混凝土高墩拟静力试验,初步研究了双向拟静力加载规则对其滞回特性的影响规律。本文主要介绍钢筋混凝土高墩的试验构件设计,加载装置、测试方法和加载规则,着重比较了对角线加载、正方形加载、菱形加载和圆形加载等四种加载规则的钢筋混凝土高墩的滞回性能,包括荷载-位移滞回曲线、荷载-位移骨架曲线、荷载退化、刚度退化以及累积滞回耗能的特点,并分析这些特点与双向加载规则之间的关系。结论认为:对角线加载模式加载效率高且能较好反映高墩双向抗震滞回性能,适合于高墩的双向拟静力试验研究。
Through the four kinds of quasi-static test of reinforced concrete high pier with four different two-way loading rules, the influence law of bi-directional quasi-static loading rules on the hysteresis characteristics was preliminarily studied. In this paper, the design, loading device, testing methods and loading rules of reinforced concrete high piers are mainly introduced. The four loading rules of diagonal loading, square loading, diamond loading and circular loading are compared. Back performance, including load-displacement hysteresis curve, load-displacement skeleton curve, load degradation, stiffness degradation and cumulative hysteresis energy consumption, and analyze the relationship between these characteristics and the bidirectional loading rules. The conclusion is that the diagonal loading mode has high loading efficiency and can well reflect the biaxial seismic hysteretic behavior of high pier, which is suitable for the bidirectional quasi-static test of high pier.