装配整体式地铁车站侧墙底节点抗震性能研究

发布时间：2018-11-10 14:06

【摘要】：为了评价装配整体式地铁车站整体抗震性能,以北京金安桥装配整体式地铁车站为背景,设计制作了一个足尺预制拼装侧墙底节点和一个作为对比的足尺现浇侧墙底节点。采用低周循环加载试验,研究了预制拼装侧墙底节点的破坏形态、滞回特性、承载力、变形能力、耗能性能以及套筒灌浆连接接头受力状态等指标。试验结果表明:预制拼装侧墙底节点与现浇侧墙底节点的承载力和变形能力基本相当,但耗能性能显著降低;两者的破坏形态明显不同,现浇侧墙底节点的裂缝发展比较充分,分布均匀密集,而预制拼装侧墙底节点的裂缝相对集中,其主要分布在刚度突变处以及弯矩最大截面。与现浇侧墙底节点相比,预制拼装侧墙底节点的初始刚度较大,但加载后期,其刚度显著降低。另外,基于灌浆套筒接头在构件中的受力状态分析,对灌浆套筒提出了一种等效抗弯刚度简化处理方法并对两种不同连接方式的侧墙底节点进行了数值分析,其破坏形态和骨架曲线与试验结果吻合较好,验证了该方法的合理性。
[Abstract]:In order to evaluate the overall seismic performance of the assembled integral subway station, a full-scale prefabricated side wall bottom node and a full-scale cast-in-place side wall bottom node are designed and manufactured under the background of Beijing Jin'an Bridge assembled integral subway station. In this paper, the failure mode, hysteretic characteristics, bearing capacity, deformation capacity, energy dissipation performance and the stress state of sleeve grouting joint were studied by low cycle cyclic loading test. The test results show that the bearing capacity and deformation capacity of prefabricated side wall bottom joints are basically equal to those of cast-in-place side wall bottom joints, but the energy dissipation performance is significantly reduced. The fracture pattern of the two joints is obviously different. The cracks of the cast-in-place side wall bottom joints are relatively well developed and distributed uniformly and densely, while the cracks of the precast assembled side wall bottom joints are relatively concentrated, which are mainly distributed in the places where the stiffness changes and the maximum bending moment section. Compared with the cast-in-place side wall bottom joint, the initial stiffness of the prefabricated side wall bottom joint is larger, but the stiffness of the prefabricated side wall bottom joint decreases significantly in the later stage of loading. In addition, based on the stress state analysis of grouting sleeve joints in members, a simplified method of equivalent flexural stiffness is proposed for grouting sleeve joints. The failure morphology and skeleton curve are in good agreement with the experimental results, and the rationality of the method is verified.
【作者单位】：北京工业大学城市与工程安全减灾教育部重点实验室;北京市轨道交通建设管理有限公司;北京市轨道交通设计研究院有限公司;
【基金】：国家自然科学基金创新研究群体项目(51421005);国家自然科学基金(51522802) 北京市交通行业科技项目(2016-gdsbssc-01-029)
【分类号】：U231.4;TU352.11

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