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首页> 外文会议>International Conference on High Performance Materials in Bridges; 20010729-20010803; Kona,HI; US >SEISMIC PERFORMANCE EVALUATION OF BEAM-COLUMN JOINTS FOR PRESTRESSED RC BUILDINGS WITH HIGH PERFORMANCE MATERIALS
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SEISMIC PERFORMANCE EVALUATION OF BEAM-COLUMN JOINTS FOR PRESTRESSED RC BUILDINGS WITH HIGH PERFORMANCE MATERIALS

机译：高性能材料预应力RC建筑梁柱节点的抗震性能评估

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摘要

Four one-third-scale prestressed RC (PRC) interior beam-column joints were tested by the authors. The main parameters of this test were the prestressing force and the bond condition between the grout and prestressing tendons passing through a joint. Prestressing force was applied at the ends of the beams using the post-tensioning method. These beam-column joints were analyzed using a nonlinear finite element method (FEM). The analysis was carried out by considering the bond between the grout and prestressing tendons as in the tests. All specimens failed in joint shear failure both in the tests and in the FEM analysis. The FEM results show a good agreement with the test results on the maximum story shear forces and the failure mode. From the experimental and FEM results, the effects of the prestressing force and the bond condition between the grout and prestressing tendons on the joint shear capacity were examined. The following conclusions can be made from the detailed investigations: (1) The joint shear cracking strength obtained from the tests was almost constant regardless of the level of the prestressing force. However, the angles of shear cracking in the joint changed with the prestressing forces. (2) The shear capacity of the joint was not much affected by the prestressing forces. (3) Because the bond between the grout and rounded tendons deteriorated at an early loading stage, the effect of the bond conditions on the joint shear capacity was not significant.
机译：作者测试了四个三分之一比例的预应力RC（PRC）内部梁柱节点。该测试的主要参数是预应力和水泥浆与预应力筋通过接缝之间的粘结条件。使用后张紧方法在梁的末端施加预应力。使用非线性有限元方法（FEM）对这些梁柱节点进行了分析。如在测试中一样，通过考虑灌浆和预应力筋之间的粘结来进行分析。在测试和有限元分析中，所有试样的接头剪切破坏均失败。有限元结果与最大层剪力和破坏模式的测试结果吻合良好。从实验和有限元结果，检查了预应力和灌浆和预应力筋之间的粘结条件对关节剪切能力的影响。通过详细的研究可以得出以下结论：（1）从试验中获得的接头剪切开裂强度几乎恒定，而与预应力的大小无关。但是，接头中的剪切裂纹的角度随预应力而变化。 （2）接头的剪切能力受预应力的影响不大。 （3）由于水泥浆和圆形筋之间的粘结在加载初期会变差，因此粘结条件对接缝剪切能力的影响并不明显。

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