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Multi-scale Finite Element Analysis of Fatigue Property Composite Girder Bridges with Corrugated Steel Webs and Concrete Filled Steel Tubes(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2018年05期
Page:
78-85
Research Field:
Publishing date:

Info

Title:
Multi-scale Finite Element Analysis of Fatigue Property Composite Girder Bridges with Corrugated Steel Webs and Concrete Filled Steel Tubes
Author(s):
WANG Zhi-yu ZHANG Tao JIANG Rui-juan DONG Ju-can LI Xiao-lei GAI Wei-ming
College of Architecture & Environment, Sichuan University
Keywords:
multi-scale model corrugated web concrete filled steel tube composite girder fatigue property
PACS:
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DOI:
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Abstract:
The finite element models were developed for composite girders with corrugated steel webs and concrete filled steel tubes using multipoint constraint and multi-scale modeling. The prediction accuracy and calculation efficiency of adopted finite element models were verified through a comparison with theoretical formulas. Based on the multi-scale model, the stress characteristics of connecting parts joining the corrugated steel webs and the concrete filled steel tubes were analyzed. A comparison was made for the prediction results influenced by the corrugation angle and the ratio of corrugation bending radius to corrugation height. The results show that the use of multiscale model can effectively promote the calculation efficiency without affecting precision of fatigue life prediction as a precondition. 28.9% less calculation time and 2% prediction relative error can be achieved in multi-scale model with respect to refined model. For macro girder model, 40.7% less calculation time and 5% prediction relative error can be attained in multi-scale model. The adverse stress condition of connecting parts between the corrugated steel webs and the concrete filled steel tubes can be simulated accordingly. The resultant maximum principal stress relative error is within 5%, and the method can simulate adverse stress behavior of connecting part between corrugated webs and concrete filled steel tubes. Thus, the analytical results can be taken as a reference for damages of composite girder bridges with corrugated steel webs and concrete filled steel tubes.

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Last Update: 2018-09-03