Dynamic Study of Unseating Prevention Devices under Earthquake
Unseating prevention devices(UPD) are used to prevent relative great displacement between supper-structure and sub-structure, and to protect the super-structure falling down from piers as the support loss capacity. Unseating prevention devices are the ultimate security installment in the collapse-proof system when the highway bridges encounter rare earthquake or unexpected earthquake.Based on the relational design standards at home and abroad, the paper is emphasis on the time-history analysis for structure with cable-unseating prevention devices under rare earthquake.The analysis results obtained show that the collapse-proof effectiveness of unseating prevention devices and the variation law of collapseproof changing with cable length and design displacement value.Whats more, under rare seismic, the rational unseating prevention devices can ensure the ultimate security of the structure, increase the integrity and anti-pushing rigidity of the structure, and make the seismic load to be well-distributed among the piers.As a result, the unseating prevention devices can effectively avoid girder falling in strong seismic, achieving no collapsing in strong seismic.
bridge unseating prevention devices rare earthquake
Lei Fang Yumin Zhang Yuanyuan Sun
Hunan Urban Construction College.Xiangtan,Hunan Province.411101,P.R.China Changan University,Xian,Shaanxi Province,710064,P.R.China
国际会议
厦门
英文
854-858
2011-07-08（万方平台首次上网日期，不代表论文的发表时间）