STUDY ON SEISMIC DAMAGE CHARACTERISTICS OF PRESTRESSED ANCHOR CABLES UNDER LOW FREQUENCY RECIPROCATING LOADS
ZHENG Da，LIANG Lidan，JU Nengpan
(1. Sate Key Laboratory of Geohazard Prevention and Geoenvironment Protection，Chengdu University of Technology，Chengdu，Sichuan 610059，China；2. Chongqing Design and Research Institute Co.，Ltd.，China Coal Technology and Engineering Group，Chongqing 404100，China)
Abstract：The study includes an experimental mode constructed based on a real prestressed anchor cable project in the earthquake-stricken zone，where the seismic loading is imposed through low frequency reciprocating loading. The results of the experimental study are summarized. First，the failure of prestressed anchor cables occurs from the upper to the lower part in sequence under reciprocating loading. The top row of cables is the most severely damaged part，where the failure types are dominated by the breakage at the bottom of the cable and the detachment at the head of the cable. No evidence is observed that supports any failure and destruction of bond force and bond stress of the anchoring section. Second，the deformation of cable concentrates on the anchoring section with large strain occurred on the bottom of the section and the part adjacent to the sliding surface. Small strain is found on the free segment. Third，the reciprocating loading imposes greater impact on the prestressed anchor cables in terms of deformation compared to the constant mono-directional thrust or single mono-directional thrust. The reciprocating loading test is the most widely used approach in the experimental study of seismic structural performance，the results obtained in this study provides a mean of systematic evaluation on the safety and quality of prestressed anchor cables during and/or after the earthquake and can be used in comparison with other study on the seismic performance of prestressed cables.
陆遐龄. 岩石高边坡爆破开挖对锚固设施的影响[J]. 爆破，2000，17(增)：147-151.(LU Xialing. Influence of rock high slope explosive excavation on anchored installations[J]. Blasting，2000，17(Supp.)：147-151.(in Chinese))
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2015, Vol. 34 
