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Performance of Sacrificial Exterior Shear Keys Under Simulated Seismic Loading

机译:地震作用下牺牲外部剪力键的性能

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摘要

Performance evaluation of sacrificial exterior shear keys under simulated seismic loading is presented in this paper. The performance evaluation was conducted in terms of damage levels observed during testing. The experimental program consisted of six experiments, and the variables investigated during testing were; (1) inclusion and exclusion of back and wing walls to determine influence of these walls in the seismic response of the shear keys, (2) adoption of different design details such as the use of sacrificial flexural keys, and (3) prestressing of the abutments with the main objective of decreasing damage propagation into the abutment walls. These experiments provided results that were used to make realistic assumptions of the load-deformation response of sacrificial exterior shear keys as well as their post-peak performance under cyclic loads. Experimental and analytical results were also used to develop a hysteretic model for exterior sacrificial shear keys at the abutments. The development of this hysteretic model is also discussed in the paper.
机译:本文提出了在模拟地震荷载作用下的牺牲外部剪力键的性能评估。根据测试期间观察到的损坏程度进行性能评估。实验程序包括六个实验,在测试过程中调查的变量是: (1)包括和排除后墙和翼墙,以确定这些墙在剪力键的地震响应中的影响;(2)采用不同的设计细节,例如使用牺牲挠曲键,以及(3)对墙进行预应力基台的主要目的是减少损伤传播到基台壁中。这些实验提供的结果可用于对牺牲性外部剪力键的载荷-变形响应以及其在循环载荷下的峰值后性能做出现实的假设。实验和分析结果也被用来为基台上的外部牺牲剪切键建立滞后模型。本文还讨论了这种滞后模型的发展。

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