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波形钢腹板组合板梁桥负弯矩区抗弯性能研究

Research on bending performance of composite girder bridge with corrugated steel webs in negative moment zone

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针对波形钢腹板组合板梁桥,为研究负弯矩区关键设计参数和极限抗弯承载能力计算方法,以某三跨波形钢腹板组合板梁桥为背景,采用ABAQUS软件建立有限元模型,探讨波形钢腹板组合板梁桥负弯矩区的受力性能,基于参数敏感性分析明确了负弯矩区钢梁设计参数的合理取值范围,揭示了波形钢腹板组合板梁桥负弯矩区抗弯特性,提出适用于波形钢腹板组合板梁桥的负弯矩区抗弯计算方法.结果表明:支点波形钢腹板厚度由抗剪及屈曲强度控制,负弯矩区受压下翼缘板宽厚比不宜大于 28,波形钢腹板抗弯贡献仅约 5.7%,实际工程中负弯矩区抗弯承载力计算可忽略波形钢腹板影响.
In order to clarify the key design parameters of the negative bending moment zone and the ultimate bending calculation method of the composite girder bridge with corrugated steel webs,a three-span composite girder bridge with corrugated steel webs was used as the background,the finite element model was established by ABAQUS software,and the mechanical performance of the composite girder bridge with corrugated steel webs in the negative bending moment zone was studied.Through parameter sensitivity analysis,the reasonable range of design parameters of steel beams in the negative bending moment zone was clarified,and the bending mechanism of composite girder bridge with corrugated steel webs in the negative bending moment zone was revealed.A calculation method for bending resistance in the negative bending moment zone was proposed for composite girder bridges with corrugated steel webs.The results show that the thickness of the fulcrum corrugated steel web is controlled by the shear resistance and buckling strength.The width-to-thickness ratio of the flange plate under compression in the negative moment zone should not be greater than 28.The flexural contribution of the corrugated steel web is about 5.7%,and the flexural contribution of the corrugated steel web can be ignored in the calculation of the flexural bearing capacity of the negative bending moment zone in the actual project.

corrugated steel webcomposite girder bridgeI-steel beamnegative bending moment zonebending performancefinite element model

姜开明、王阳春、查上、彭悟焯、邓文琴、张建东

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山东高速济青中线公路有限公司,潍坊 261516

山东高速工程检测有限公司,济南 250001

南京工业大学土木工程学院,南京 211816

苏交科集团股份有限公司,南京 211112

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波形钢腹板 组合板梁桥 工字钢梁 负弯矩区 抗弯性能 有限元模型

国家自然科学基金山东省交通厅科技项目江苏省青年基金江苏省高等学校自然科学研究面上项目

519082822020B47BK2019068119KJB580002

2024

10.19701/j.jzjg.20220488

建筑结构
中国建筑设计研究院 亚太建设科技信息研究院 中国土木工程学会

建筑结构

CSTPCD北大核心
影响因子：0.723
ISSN：1002-848X
年,卷(期)：2024.54(1)
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