钢筋套筒挤压连接装配整体式梁柱中节点抗震性能试验研究
发布时间：2019-03-06 16:06
【摘要】：为研究钢筋套筒挤压连接的装配整体式叠合梁-预制柱中节点的抗震性能,进行了2个装配整体式中节点和1个现浇中节点试件的拟静力试验,观察其破坏现象,研究其滞回性能、承载力、变形能力及钢筋应变发展过程。结果表明:所设计的核心区剪切破坏和梁端弯曲破坏节点均实现了预期的破坏形态;核心区剪切破坏的装配整体式梁柱节点与现浇对比节点的破坏过程、裂缝分布基本一致,滞回曲线、承载力、刚度、变形、耗能等性能指标基本相同;核心区剪切破坏、梁端弯曲破坏的装配整体式梁柱中节点的承载力试验值与相应的规范公式计算值的比值分别为1.62、1.31,等效极限层间位移角分别为1/26和1/27;试验结束后,凿开混凝土发现套筒没有出现裂纹,钢筋在套筒内未见滑移,套筒挤压接头可有效传递钢筋拉、压力。
[Abstract]:In order to study the seismic behavior of joints in assembled monolithic composite beam-prefabricated columns with extruded steel sleeve connections, the pseudo-static tests of two assembled integral middle joints and one cast-in-situ joint were carried out, and the failure phenomena were observed. The hysteretic performance, bearing capacity, deformation capacity and strain development process of steel bars were studied. The results show that the designed shear failure in the core region and the bending failure joint at the beam end achieve the expected failure pattern. The failure process of the assembled integral Liang Zhu joints and cast-in-place joints with shear failure in the core region is basically the same as the fracture distribution, hysteretic curve, bearing capacity, stiffness, deformation, energy dissipation and other performance indexes. The ratio of the bearing capacity test value to the calculated value of the corresponding code formula is 1.62, 1.31, and the displacement angle of the equivalent limit layer is 1? 26 and 1? 27, respectively, in the shear failure of the core region and the bending failure of the beam end in the assembled integral joints of Liang Zhu, the ratio of the bearing capacity test value to the corresponding code formula is 1.62 and 1.31 respectively. At the end of the test, it was found that there were no cracks in the sleeve and there was no slip of the steel bar in the sleeve. The extrusion joint of the sleeve could effectively transfer the tension and pressure of the steel bar.
【作者单位】： 清华大学土木工程安全与耐久教育部重点实验室;内蒙古蒙西工程设计有限公司;
【分类号】：TU352.11
[Abstract]:In order to study the seismic behavior of joints in assembled monolithic composite beam-prefabricated columns with extruded steel sleeve connections, the pseudo-static tests of two assembled integral middle joints and one cast-in-situ joint were carried out, and the failure phenomena were observed. The hysteretic performance, bearing capacity, deformation capacity and strain development process of steel bars were studied. The results show that the designed shear failure in the core region and the bending failure joint at the beam end achieve the expected failure pattern. The failure process of the assembled integral Liang Zhu joints and cast-in-place joints with shear failure in the core region is basically the same as the fracture distribution, hysteretic curve, bearing capacity, stiffness, deformation, energy dissipation and other performance indexes. The ratio of the bearing capacity test value to the calculated value of the corresponding code formula is 1.62, 1.31, and the displacement angle of the equivalent limit layer is 1? 26 and 1? 27, respectively, in the shear failure of the core region and the bending failure of the beam end in the assembled integral joints of Liang Zhu, the ratio of the bearing capacity test value to the corresponding code formula is 1.62 and 1.31 respectively. At the end of the test, it was found that there were no cracks in the sleeve and there was no slip of the steel bar in the sleeve. The extrusion joint of the sleeve could effectively transfer the tension and pressure of the steel bar.
【作者单位】： 清华大学土木工程安全与耐久教育部重点实验室;内蒙古蒙西工程设计有限公司;
【分类号】：TU352.11
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