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1. A FE model for studying high frequency vibration characteristics of simply-supported box-girder | |||
SONG Lizhong,LI Xiaozhen,ZHANG Xun,LI Yadong | |||
Civil and Architectural Engineering 02 December 2015 | |||
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Abstract:A track-bridge coupled vibration model was established based on finite element method to simulate a 32 m high-speed railway simply-supported prestressed concrete box-girder with a CRTS type II slab ballastless track system. Acceleration mobilities of track slab and box-girder's top slab in frequency band from 10 Hz to 1000 Hz was calculated using the finite element model. To validate the reliability of the model, an in-situ hammer excitation test was conducted. The test and calculated results were compared and agreed well, which indicate that the high frequency vibration characteristics of box-girder can be accurately simulated by the model. | |||
TO cite this article:SONG Lizhong,LI Xiaozhen,ZHANG Xun, et al. A FE model for studying high frequency vibration characteristics of simply-supported box-girder[OL].[ 2 December 2015] http://en.paper.edu.cn/en_releasepaper/content/4668294 |
2. A Simplified Method of Obtaining the Seismic Damage index of Single Steel-concrete Composite Building | |||
Liu Yangbing,Cao Tianfeng | |||
Civil and Architectural Engineering 24 October 2014 | |||
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Abstract:Owing to the lack of the seismic damage data of the steel-concrete composite structure, it is difficult to use the avaible empirical methods to get the seismic damage index of the composite structures to predict the seismic damage. According to the definition of mean seismic damage index and the seismic fragility method of composite structures, a simplified method of calculating seismic damage index of single composite building was proposed. In this method the uncertainty due to variability in ground motion characteristics and structures was considered. Based on this method, seismic fragility analysis was carried out for two composite frames, then the vulnerability matrix was obtained, and finally the seismic damage index was calculated to evaluate and compare the damage sate. The simplified method may be a very useful tool to estimate the seismic safety and predict the seismic loss. | |||
TO cite this article:Liu Yangbing,Cao Tianfeng. A Simplified Method of Obtaining the Seismic Damage index of Single Steel-concrete Composite Building[OL].[24 October 2014] http://en.paper.edu.cn/en_releasepaper/content/4615094 |
3. SEISMIC RESPONCE OF A SHALLOW BASIN FROM EARTHQUAKE ON A BLIND ACTIVE FAULT BENEATH | |||
Tao Xiaxin,Sun Xiaodan,Liu Haimin,Li Ping | |||
Civil and Architectural Engineering 14 June 2007 | |||
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Abstract:Many cities in the world are located in basins. Basin can amplify ground motion significantly by the soft sediment, buried rock topography and edge effect in it. Hundreds of papers have been published on this effect for decades. Seismic waves are adopted as inputs in the analysis. Near field ground motion is governed predominantly by earthquake source. A hybrid source model is introduced in this paper, which combines Asperity model and K square model to take into account the physical nature and ignorance on the slip distribution on the faulting plane. The ground motion in short period range is synthesized by a random method in which dynamic corner frequency is applied in each sub-source model. The ground motion in the basin is further calculated by means of 1D equivalent linearization procedure. Two steps are carried out for the long period motion. Firstly, the displacement field at the top of buried crystal base rock surface is calculated by analytical Green Function method. Then the ground motion at ground surface is calculated by 3D wave propagation finite element method with input from the first step. The two parts of ground motion are finally superposed. For illustration, the result of a shallow basin from an earthquake with magnitude 6 on the blind fault beneath is shown and the distribution pattern of the response motion is summarized. | |||
TO cite this article:Tao Xiaxin,Sun Xiaodan,Liu Haimin, et al. SEISMIC RESPONCE OF A SHALLOW BASIN FROM EARTHQUAKE ON A BLIND ACTIVE FAULT BENEATH[OL].[14 June 2007] http://en.paper.edu.cn/en_releasepaper/content/13470 |
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