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Failure mechanism of retaining wall in earthquake and its seismic design measure
Language英语
Wu Yong1,2; He Siming1,2; Li Xinpo1,2
Corresponding AuthorYong Wu
2010
Source PublicationNEAR-SURFACE GEOPHYSICS AND GEOHAZARDS - PROCEEDINGS OF THE 4TH INTERNATIONAL CONFERENCE ON ENVIRONMENTAL AND ENGINEERING GEOPHYSICS, VOLS 1 AND 2
Author of SourceWang, X ; Xia, J ; Yan, J ; Xu, Y ; Ye, C ; Luo, Y
Pages113-119
meeting4th International Conference on Environmental and Engineering Geophysics
Conference DateJUN 14-19, 2010
Conference PlaceChengdu Univ Technol, Chengdu
CountryPEOPLES R CHINA
PublisherChengdu Univ Technol
Contribution Rank1
Funding OrganizationChinese Geophysical Society;National Natural Science Foundation of China;China University of Geosciences(CUG);Chengdu University of Technology(CDUT)
AbstractThe failure of retaining wall in earthquake is the main factor that aggravates the harm of mountain hazards. However, the mechanism such as structure response to seismic is not clear and can't resolute the interaction mechanism between retaining system and seismic force, thus no effective seismic measures can be used in project at present. Therefore, based on energy theory, taken the upper bound theorem as measure, the safety of retaining system is defined, and then the mechanism of input and dissipation of seismic energy is studied. Furthermore, by analyzing the wave characters of destructive earthquake, and according to the flexible retaining theory, a seismic design of retaining wall is proposed. At last, an example is given and shows the seismic behavior of common rigid retaining wall is poor and the structure fails quickly under big seismic force with specific direction. On the contrary, the new system with EPS damping layer can attenuate seismic energy well.
Other Abstract传统刚性挡墙抗震性能很差,震时极易损毁,致使震后大量挡墙支挡坡体大量失稳破坏。目前有关地震荷载作用下挡墙的失效机理还不清晰,对其与震波间的响应机制也缺乏研究,不能有效解析震波和挡墙体系间的相互作用,也无法提出科学有效的抗震措施。为此,以极限分析的上限定理为工具,从能量角度研究了震时挡墙支挡体系的能量输入与耗散机制,分析了坡体失稳过程和机理。继而在分析导致支挡体系失效的地震荷载特征的基础上,结合柔性防护理论,提出了新型耗能减震挡墙的设计方法和工作机理。最后算例分析表明,传统挡墙因刚性防护而使震波能量集中作用,抗震效果差,通常在特定方向和足够大小的地震荷载反复作用下经损伤和变形累积很快破坏;新型耗能挡墙在允许坡体发生可控内位移的同时,通过EPS减震层的变形来有效的耗散地震波能,可很好的削弱挡墙结构上的地震作用。
KeywordSeismic wave failure of retaining wall upper bound theorem energy dissipation flexible protection
ISBN978-1-933100-37-1
Indexed ByCPCI
WOS IDWOS:000395216700016
Citation statistics
Document Type会议论文
Identifierhttp://ir.imde.ac.cn/handle/131551/7443
Collection山地灾害与地表过程重点实验室
Corresponding AuthorWu Yong
Affiliation1.Chinese Acad Sci, Key Lab Mt Hazards & Surface Proc, Chengdu 610041, Peoples R China;
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Wu Yong,He Siming,Li Xinpo. Failure mechanism of retaining wall in earthquake and its seismic design measure[C]//Wang, X, Xia, J, Yan, J, Xu, Y, Ye, C, Luo, Y:Chengdu Univ Technol,2010:113-119.
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