Seismic Response and Cushioning Research of Long-span Railway Continuous Beam-arch Composite Bridge
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Bibliographic Details
| Author(s): |
Yu Wang
(School of civil engineering, Central South University, China)
Gonglian Dai (School of civil engineering, Central South University, China) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Conference: Structural Engineering: Providing Solutions to Global Challenges, Geneva, Switzerland, September 2015 | ||||
| Published in: | IABSE Conference Geneva 2015 | ||||
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| Page(s): | 1845-1849 | ||||
| Total no. of pages: | 5 | ||||
| Year: | 2015 | ||||
| DOI: | 10.2749/222137815818359276 | ||||
| Abstract: |
For analyzing the seismic response and cushioning rules of long-span continuous arch-beam bridge, taking a (82+172+82)m long-span continuous beam-arch bridge on the Lanzhou-Chongqing railway as an example, the pile-pier-beam-arch finite element model considering the interaction between pile and soil was established. It was discussed that the higher modal shape, geometrical non-linearity, travelling wave effect and so on had impact on the seismic response. The results show that the largest internal forces happen on the arch feet. The sectional internal force mostly depends on lower modal shapes(the first 30 modal shapes). With the increase of travelling wave speed, internal forces of the arch bridge vary in different positions. The speed lock-up devices can significantly reduce the displacement and seismic forces of the fixed bearing piers, whose seismic damping rate can reach 18%. |
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| Keywords: |
seismic response Beam-arch bridge Travelling wave effect Speed lock-up device
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