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| Application of Simplified Model of the Pile Foundation in Earthquake— resistance of Bridge |
| GONG Wei1, QI Dong-yan2 |
| 1.The Third Railway Survey and Design Institute Group Corporation, Tianjin 300142, China ;2.Xi'an Municipal Engineering Design& Research Institute, Xi'an Shanxi 710068, China |
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Abstract Research purposes: Pile foundation structure has bees more and more adopted because of its less weight various shapes and perfect adaptability .But in application the earthquake- resistance theory of foundation which is very Important to the earthquake-resistance performance of the structure has not been reached at final conclusion. There are three analysis ways to describe the pile foundation of bridge under the earthquake action embed method,6一spring method and method. Taking continuous beam as an example,his paper analyses these three methods advantages and disadvantages and gives suggestions to their applications in engineering practice.
Research conclusions: The entire rigidity of structure is big and basic period of structure is less than practice when using the embed method model under earthquake, resulting in the larger internal force and conservative design .The attention should be paid to the less displacement of structure . It is a reasonable way to use them method model for calculating the earthquake- resistance of the structure because it can consider the joint effects of pile foundation and bridge structure and reflect the influence o f soil body at the same time, but it require lots of time to do calculation on the computer. The same result as them method can be obtained by 6一spring method with less work of establishing model, so it is suitable for convention design.
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Received: 29 February 2008
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2008, Vol. 25 
