竖向低周反复荷载作用下无粘结部分预应力混凝土框架结构的抗震性能试验研究

Behavior of Unbonded Partially Prestressed Concrete Frames under Vertically Reversed Cyclic Loading

本文报道了五榀无粘结部分预应力混凝土框架结构在竖向低周反复荷载作用下的试验研究结果。对无粘结部分预应力混凝土框架结构在竖向低周反复荷载作用下的工作性能（包括无粘结筋应力、裂缝分布、恢复力特征、位移延性、极限承载力和破坏形态等）进行了详细探讨，提出了影响结构极限承载力和位移延性的主要因素，并进行了非线性有限元分析比较，为进一步完善我国无粘结预应力混凝土结构设计规程提供了重要参考资料。

The test results of five unbonded partially prestressed concrete frameworks are reported inthis paper. The specimens were subjected to vertically reversed cyclic loading. The variation of thestresses in unbonded tendons, crack distribution, restoring force characteristics, displacementductility, ultimate strength and failure patterns of these frames were studied and the principal factorsaffecting ultimate strength and displacement ductility were discussed. In addition, the behavior ofthe frames were studied by nonlinear finite element analysis. The results of this investigation mayserve as a valuable reference for the revision of relevant design codes.