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[1]GUO Kunlin,LI Xiaojun,WU Jingwu,et al.Seismic Wave Propagation Effect on Seismic Response of Long-span Bridges with High Piers Across River Valleys[J].Journal of Seismological Research,2020,43(03):531-538.

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Seismic Wave Propagation Effect on Seismic Response of Long-span Bridges with High Piers Across River Valleys

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 43 Number of periods: 2020 03 Page number: 531-538 Column: Public date: 2020-09-14

Title:: Seismic Wave Propagation Effect on Seismic Response of Long-span Bridges with High Piers Across River Valleys

Author(s):: GUO Kunlin¹; LI Xiaojun¹; 2; WU Jingwu³; SUN Pingkuan³; LI Bangwu⁴; (1.Institute of Geophysics，China Earthquake Administration，Beijing 100081，China)(2.Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology，Beijing 100124，China)(3.China Highway Engineering Consultants Corporation，Beijing 100089，China)(4.Hainan Transportation Engineering Construction Bureau，Haikou 570208，Hainan，China)

Keywords:: valley topography; long-span and high pier bridge; incident angle of seismic wave; time delay of ground motions; seismic response

CLC:: U442.5+5

DOI:: -

Abstract:: The seismic wave propagation effect leads to the difference of ground motion intensity and arrival time at the base of each pier，which makes the response of this kind of bridge structure more complicated.The structure models of high pier and long span concrete continuous rigid frame bridges were constructed，and considering the structure models of pier height symmetry and asymmetry and input seismic waves with different frequency properties，the numerical simulation of structural responses of bridges was carried out by means of large mass method，and the effect of the time delay of ground motions caused by the incline incidence of seismic waves at pier foundation sites of the bridge on the structural responses of bridges was discussed.The analysis results show that:①the wave propagation effect due to leads to the extreme asymmetry of the responses of the symmetrical structure bridge，and increases the complexity of the responses of the asymmetric structure bridge；②The internal force change of the structural responses of bridges and very uneven spatial distribution of the impact，The middle span between the high piers，and the middle piers in the pier responses of bridges are greatly affected；③With the increase of incident angle of seismic wave，in general，the change degree of structural responses of bridges tends to relatively large；④The characteristics of the effect of traveling wave on the response of bridge structure are closely related to the spectral characteristics of the input ground motion.

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Last Update: 2020-09-18