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CYCLIC LOADING TEST ON REAL-SCALED RC COLUMN EXTERNALLY RETROFITTED BY PC BAR PRESTRESSING

机译：PC棒预压外部改良的实型RC柱的循环荷载试验

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摘要

A permanent and/or an emergency seismic retrofit technique of PC bar prestressing using corner blocks for shear critical RC columns that proposed by T. Yamakawa in 1999 was verified through the cyclic loading tests on RC column specimens with a scale factor of 1/2.4. To verify the effectiveness of the proposed retrofit technique for real cases, loading tests on full-scaled column specimens were conducted under a joint-research project by the collaboration with the Center for Research on Earthquake Engineering (NCREE), Taiwan University, and University of the Ryukyus, Japan. In this paper, the experimental investigation of the full-scaled specimens and their seismic performance are compared with that of the small-scaled specimens. Experimentally it was observed that the failure mode of the full-scaled specimen retrofitted by the proposed technique shifted from shear to ductile flexural one. Moreover, by emergency retrofitting of the shear-damaged full-scaled column, the experimental lateral force capacity almost recovered with keeping the ductility and sustaining of the vertical load.
机译：T. Yamakawa于1999年提出的一种永久性和/或紧急地震翻新技术，用于PC钢筋的预应力，使用的是抗剪临界RC柱的角块，其通过比例系数为1 / 2.4的RC柱试样的循环荷载试验得到了验证。为了验证所提出的改造技术在实际案例中的有效性，与台湾大学地震工程研究中心（NCREE）和台湾大学地震工程研究中心（NCREE）共同开展了一项联合研究项目，对全尺寸柱标本进行了载荷测试。日本琉球。本文将全尺寸试件的试验研究及其抗震性能与小尺寸试件进行了比较。实验上观察到，通过所提出的技术改造的全尺寸试样的破坏模式从剪切转变为韧性弯曲。此外，通过对受剪切破坏的满量程柱进行紧急改造，在保持延展性和维持垂直载荷的情况下，几乎恢复了实验侧向力的能力。

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