Loading capacity evaluation of composite box girder with corrugated webs and steel tube slab
Loading capacity evaluation of composite box girder with corrugated webs and steel tube slab
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DOI：
10.12989/sem.2014.50.4.501
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发表时间：
2014-05
影响因子：
2.2
通讯作者：
Jun He;Yuqing Liu;Xiaoqing Xu;Laibin Li
中科院分区：
文献类型：
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作者：
Jun He;Yuqing Liu;Xiaoqing Xu;Laibin Li
为了克服腹板开裂和减轻自重，提出了一种波形腹板-钢管混凝土组合箱梁。波纹钢腹板的使用，提高了预应力的效率引入到顶部和底部板，由于手风琴效应。为了了解这种新型复合材料结构的承载能力，进行了实验和数值分析。通过对足尺模型进行单调加载，研究了全过程中的挠度、应变分布、承载力和刚度。试验结果表明，试件具有足够的承载力和延性。在试验研究的基础上，建立了有限元模型。有限元模型预测的荷载-位移曲线和应力分布与试验结果吻合较好，验证了所建模型的准确性。此外，简化的理论分析进行了根据实验和数值结果证实的假设。简化分析结果与试验结果和数值计算结果吻合较好，表明简化分析模型可以较准确地预测这种组合梁的承载力。研究结果可为该结构在桥梁工程中的应用提供参考。
This paper presents a type of composite box girder with corrugated webs and concrete filled steel tube slab to overcome cracking on the web and reduce self-weight. Utilizing corrugated steel web improves the efficiency of prestressing introduced into the top and bottom slabs due to the accordion effect. In order to understand the loading capacity of such new composite structure, experimental and numerical analyses were conducted. A full-scale model was loaded monotonically to investigate the deflection, strain distribution, loading capacity and stiffness during the whole process. The experimental results show that test specimen has enough loading capacity and ductility. Based on experimental works, a finite element (FE) model was established. The load-displacement curves and stress distribution predicted by FE model agree well with that obtained from experiments, which demonstrates the accuracy of proposed FE model. Moreover, simplified theoretical analysis was conducted depending on the assumptions which were confirmed by the experimental and numerical results. The simplified analysis results are identical with the tested and numerical results, which indicate that simplified analytical model can be used to predict the loading capacity of such composite girder accurately. All the findings of present study may provide reference for the application of such structure in bridge construction.