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| 横联损伤影响下新型波形钢腹板简支组合梁桥荷载横向分布系数研究 |
| Study on the Transverse Load Distribution Coefficient of Simply Supported Novel Composite Girder Bridges with Corrugated Steel Webs under the Influence of Cross-Bracing Damage |
| 投稿时间：2025-01-06 修订日期：2025-03-24 |
| DOI： |
| 中文关键词: 波形钢腹板 组合箱梁 横向分布系数 横联损伤 有限元方法 |
| 英文关键词:Corrugated steel web Composite box girder Transverse distribution coefficient Cross-bracing Damage Finite element method |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 为分析箱间横联损伤对波形钢腹板钢-混凝土简支组合箱梁桥荷载横向分布系数（LDC）的影响，首先基于能量法推导了偏心荷载作用下组合箱梁的挠度表达式，并利用挠度比例计算了LDC的理论值。随后，采用ANSYS软件，以兰州新区南立交机场的一座波形钢腹板钢-混凝土组合箱梁桥为研究对象进行有限元分析，并通过试验验证其准确性。在此基础上，探讨了主梁数量、箱梁横联类型、横联数量及刚度，以及横联损伤等因素对LDC的影响规律。最后，结合不同工况对LDC理论计算公式进行拟合，拟合后的LDC计算公式与有限元分析结果最大误差为5.02%，验证了该公式的工程适用性。 |
| 英文摘要: |
| To investigate the effects of inter-box cross-beam damage on the load transverse distribution coefficient (LDC) of simply supported corrugated steel web-concrete composite box girder bridges, the deflection expression of the composite box girder under eccentric loading was first derived using the energy method, and the theoretical LDC was determined based on the deflection ratio. A finite element analysis (FEA) was then conducted using ANSYS, with a corrugated steel web–concrete composite box girder bridge in the Lanzhou New District South Interchange Airport as the case study, and the numerical results were validated through experimental testing. Furthermore, the influences of key parameters-including the number of main girders, cross-beam type, cross-beam quantity and stiffness, and cross-beam damage-on the LDC were systematically analyzed. Finally, a theoretical LDC calculation formula was established through curve fitting under different working conditions. The fitted LDC calculation formula demonstrates a maximum deviation of 5.02% compared with the FEA results, confirming the accuracy and engineering applicability of the proposed method. |
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