|
|
|
| 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.
|
|
|
|
|
|
| [1] 何思明. 预应力锚索作用机制研究[博士学位论文][D]. 成都：西南交通大学，2004.(HE Siming. Study on mechanism of prestressed anchor cables[Ph. D. Thesis][D]. Chengdu：Southwest Jiaotong University，2004.(in Chinese))
[2] 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))
[3] 苏华友，张继春. 紫坪铺进水口高陡边坡锚索抗爆破振动分析[J]. 岩石力学与工程学报，2003，22(11)：1 916–1 918.(SU Huayou，ZHANG Jichun. Analysis on blasting vibration effect on prestressed cable of high slope in Zipingpu project[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(11)：1 916–1 918.(in Chinese))
[4] 杨苏杭，梁 斌，顾金才，等. 锚固洞室抗爆模型试验锚索预应力变化特性研究[J]. 岩石力学与工程学报，2006，25(增2)：3 749–3 756.(YANG Suhang，LIANG Bin，GU Jincai，et al. Research on characteristics of prestress change of anchorage cable in anti- explosion model test of anchored cavern[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(Supp.2)：3 749–3 756.(in Chinese))
[5] 汪鹏程，朱大勇，许 强. 强震作用下加固边坡的动力响应及不同加固方式的比较研究[J]. 合肥工业大学学报：自然科学版，2009，32(10)：1 501–1 504.(WANG Pengcheng，ZHU Dayong，XU Qiang. Dynamic response of slopes subjected to intense earthquakes and effect comparison between various support modes[J]. Journal of Hefei University of Technology：Natural Sciences，2009，32(10)：1 501–1 504.(in Chinese))
[6] 叶帅华. 地震作用下框架锚杆支护边坡动力分析[硕士学位论文][D]. 兰州：兰州理工大学，2010.(YE Shuaihua. Dynamic analysis of slope supported with frame-anchors under earthquake action[M. S. Thesis][D]. Lanzhou：Lanzhou University of Technology，2010.(in Chinese))
[7] 石玉成，秋仁东，孙军杰，等. 地震作用下预应力锚索加固危岩体的动力响应分析[J]. 岩土力学，2011，32(4)：1 157–1 162.(SHI Yucheng，QIU Rendong，SUN Junjie. Analysis of dynamic response of dangerous rock mass reinforced by prestressed anchor cables under seismic loads[J]. Rock and Soil Mechanics，2011，32(4)：1 157–1 162. (in Chinese))
[8] 赖 杰，郑颖人，方玉树，等. 预应力锚索支护边坡地震作用下动力响应研究[J]. 地下空间与工程学报，2011，7(增2)：1 768–1 773. (LAI Jie，ZHENG Yingren，FANG Yushu，et al. Analysis on Dynamic Performance of Slope Supported with Prestressed Anchorage Cable under Earthquake[J]. Chinese Journal of Underground Space and Engineering，2011，7(Supp.2)：1 768–1 773.(in Chinese))
[9] 宋志坚. 强震条件下岩质路堑边坡与预应力锚索结构的动力相互作用机制研究[硕士学位论文][D]. 成都：西南交通大学，2008.(SONG Zhijian. Study on dynamic mechanism of interaction between cutting rock slope with prestressed anchor cable structure during strong earthquakes[M. S. Thesis][D]. Chengdu：Southwest Jiaotong University，2008.(in Chinese))
[10] 赵大伟，石永久，陈 宏. 低周往复荷载下梁柱节点的试验研究[J]. 建筑结构，2000，30(9)：3–6.(ZHAO Dawei，SHI Yongjiu，CHEN Hong. Experimental research on beam-column connections under cyclic loading[J]. Building Structure，2000， 30(9)：3–6.(in Chinese))
[11] 黄 炜，马国臣，张程华，等. 低周往复荷载作用下生态复合墙体抗震性能研究[J]. 地震工程与工程振动，2013，33(3)：155–161.(HUANG Wei，MA Guochen，ZHANG Chenghua，et al. Experimental research on seismic behavior of ecological composite wall under reversed lowly cyclic loads[J]. Journal of Earthquake Engineering and Engineering Vibration，2013，33(3)：155–161.(in Chinese))
[12] 侯伟龙. 陡倾层状岩质边坡的大型振动台物理模拟试验研究[硕士学位论文][D]. 成都：成都理工大学，2011.(HOU Weilong. Research on large-scale shaking table physical simulation experiment of steep-dipping stratified rock slope[M. S. Thesis][D]. Chengdu：Chengdu University of Technology，2011.(in Chinese) )
[13] 许 明，唐树名，李 强，等. 单锚及群锚失效对边坡稳定性影响的模型试验研究[J]. 岩石力学与工程学报，2007，26(增1)：3 755–3 760.(XU Ming，TANG Shumin，LI Qiang，et al. Laboratory model test on investigation of effect of invalidation of single and group anchor cable on slope stability[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.1)：3 755–3 760.(in Chinese))
[14] 罗红明，唐辉明，胡 斌，等. 考虑地震力的刚体极限平衡法及其工程应用[J]. 岩石力学与工程学报，2007，26(增1)：3 590–3 595.(LUO Hongming，TANG Huiming，HU Bing，et al. Rigid limit equilibrium method considering seismic force and its application[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.1)：3 590–3 595.(in Chinese))
[15] 陈安敏，顾金才，沈 俊，等. 预应力锚索的长度与预应力值对其加固效果的影响[J]. 岩石力学与工程学报，2002，21(6)：848–852.(CHEN Anmin，GU Jincai，SHEN Jun，et al. Impact of length and prestress value of anchor cable on its reinforcement effect[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(6)：848–852.(in Chinese)) |
|
|
|
2015, Vol. 34 
