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| Contrastive Analysis of the Seismic Performance for New Bridge Pier Based on Different Structure Forms |
| XIANG Min, WANG Wen - ya,AI Qing –hua |
| (Shijiazhuang Tiedao University, Shijiazhuang，Hebei 050043 , China) |
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Abstract Abstract ： Research purposes ： A large number of long - span continuous rigid frame bridges with high pier were built in the high seismic intensity of the mountain and canyon area, and it is necessary to explore and seek a new type of bridge pier for high seismic intensity area. The Erlang River Super Major Bridge was taken as the engineering background of this paper，according to the double limb thin - walled high pier section (RC pier) of this bridge and the principle of same bearing capacity and pier - top "s stiffness， two new kinds of high pier sections are optimally designed: one is connected by steel plate (CFS -1 pier) , another is connected by double corrugated steel web (CFS -2 pier) . A finite element model was established by Open Sees to study three kinds of high pier structure's characteristics with Pushover method，such as hysteretic loops， accumulative hysteretic energy dissipation，equivalent viscous damping coefficient， skeleton curves，ductility performance，and stiffness characteristics. And their seismic performances were compared and analyzed. Research conclusions:(1) At the same axial compressive ratio, based on the comparative analysis of hysteretic loops，accumulative hysteretic energy dissipation and equivalent viscous damping coefficient, the result is that CFS - 1 and CFS -2 piers^ energy dissipation is far higher than that of RC while CFS - 2 s energy dissipation is slightly higher than CFS -1. Based on the comparative analysis of skeleton curves，displacement ductility coefficient and equivalent stiffness degradation coefficient, CFS -1 and CFS -2 piers Aplastic deformation capacity is significantly higher than that of RC and the plastic deformation ability of CFS - 2 is slightly better than that of CFS - 1. (2 ) The seismic performance of the new optima - designed CFS - 1 and CFS -2 piers is better than that of RC. (3) The seismic performance of CFS -2 is slightly better than the performance of CFS -1，which shows that the connection between piers of concrete - filled steel has impact on piers＇ seismic performance and the connection of double corrugated steel web is better than the connection of steel plate in this study. (4) The research results can provide references and guidances for the design of future similar bridge structural system.
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Received: 26 January 2016
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2016, Vol. 33 
