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Large-Scale Experimental Results for Self-Centering Beams with Resilient Seismic Performance

机译:具有弹性地震性能的自定心梁的大型实验结果

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Although several self-centering seismic systems have been developed in the past, their implementation in practice has been relatively limited. Unusual field construction practices, perceived initial cost premiums and deformation incompatibility with the gravity framing are some of the issues that may be factors. A self centering beam moment frame (SCB-MF) has been developed that mitigates several of these issues. The self-centering beam (SCB) can be shop fabricated with a restoring force mechanism which eliminates deformation incompatibility and allows conventional field construction methods. The strength and stiffness of the beam are decoupled resulting in a cost-effective system that may be competitive with conventional moment frames. This paper describes an experimental program on two-thirds scale one-bay SCB specimens. Parameters that were varied in these tests include SCB depth, initial post-tensioning stress, ratio of initial post-tensioning force to fuse yield capacity, and nominal moment strength of the system. A detailed description of the test setup, post-tensioning procedure, and implementation of the energy dissipation fuse will be presented. Finally, the testing results including the behavior of the individual components (energy dissipation fuse, PT strands and beam) and global system behavior will be summarized.
机译:虽然过去已经开发了几种自定心地震系统,但其实践中的实施相对有限。不寻常的现场建设实践,感知初始成本保费和与重力构筑的变形不相容是可能是因素的一些问题。已经开发了一种自定心光束力矩框架(SCB-MF),以减轻其中几个问题。自定心梁(SCB)可以是用恢复力机制制造的店铺,消除了变形不相容,允许传统的场施工方法。光束的强度和刚度被去耦,导致具有与传统时刻框架竞争的成本效益的系统。本文介绍了三分之二规模一托架SCB标本的实验计划。这些测试中变化的参数包括SCB深度,初始后张紧应力,初始后张紧力与熔丝的屈服容量的比例,以及系统的标称力矩强度。将介绍测试设置,后张紧程序和能量耗散保险丝的实施的详细描述。最后,将总结包括各个组件(能量耗散熔丝,PT股和梁)和全球系统行为的测试结果。

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