ABSTRACT

The prestressed column, where unbonded posttensioned tendons are arranged along the axis of the RC column, showed self-centering behavior after lateral loading. To investigate the detailed hysteretic response, nine prestressed RC columns with different axial loads and transverse reinforcement arrangements were tested and subjected to the combined action of cyclic horizontal loading and constant axial loading. The experimental results revealed the failure modes, and the drift capacity was analyzed using the ductility and plastic hinge zone length. The controlling effects on residual displacements varied over time during testing, and their mechanism was explained from the point of view of energy dissipation capacity.

摘要

预应力柱，其中无粘结后张预应力筋沿钢筋混凝土柱的轴线布置，在横向加载后表现出自定心行为。为了研究详细的滞回响应，对九个具有不同轴向载荷和横向钢筋布置的预应力钢筋混凝土柱进行了测试，并承受了循环水平载荷和恒定轴向载荷的联合作用。实验结果揭示了失效模式，并利用延性和塑性铰区长度分析了漂移能力。在测试过程中对残余位移的控制效果随时间变化，并从能量耗散能力的角度解释了其机理。