墩底自复位减隔震连续梁桥地震碰撞响应研究

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Abstract Aiming at problems of only one fixed pier usually being set for continuous girder bridges and aseismic design being difficult to meet actual demands, a new self-reset seismic reduction and isolation structure at pier bottom was proposed. The aseismic effect of the proposed structure at pier bottom was studied with shaking table tests and finite element (FE) simulation. Taking a typical 3-span railway continuous girder bridge as an example, effects of the proposed structure at pier bottom on impact between the main bridge and the approach bridge were studied to analyze effects of site type, pier height and peak seismic acceleration on impact response. Results showed that the proposed structure at pier bottom has good aseismic effect, but it may increase impact response between the main bridge and the approach one; site type and pier height greatly affect its aseismic effect, with site type varying from I to IV and increase in pier height, its overall aseismic effect is more obvious.

Key words： railway continuous girder bridge self-reset seismic reduction and isolation impact

Received: 13 March 2019 Published: 28 August 2020

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	Articles by authors
	ZHANG Wenxue1
	2
	ZHANG Hong1
	2
	CHEN Ying1
	2
	FANG Rong1
	2
	ZHAO Hanqing1
	2

Cite this article:

ZHANG Wenxue1,2,ZHANG Hong1, et al. Seismic impact response of continuous girder bridge with self-reset seismic reduction and isolation structure at pier bottom[J]. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(17): 245-253.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2020/V39/I17/245

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