等厚超薄T型肋钢-混组合桥面板力学性能研究  

Research on mechanical properties of equal-thickness and ultra-thin T-rib steel-concrete composite bridge deck under the action of negative bending moment

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作  者:孙才志 何娇阳 梁健 Sun Caizhi;He Jiaoyang;Liang Jian(Sichuan Highway Planning,Survey,Design and Research Institute Co.,Ltd.,Chengdu Sichuan 610041,China)

机构地区:[1]四川省公路规划勘察设计研究院有限公司,四川成都610041

出  处:《山西建筑》2023年第17期161-164,共4页Shanxi Architecture

摘  要:为研究等厚超薄T型肋钢-混凝土组合桥面板应用在桥梁负弯矩区段的受力性能,进行了足尺模型静力试验,测试了负弯矩作用下桥面板破坏全过程的变形、应变、混凝土裂缝、极限承载力等。研究结果表明:该新型钢-混凝土组合桥面板负弯矩受力呈典型弯曲破坏模式,受载符合平截面假定,板重量和负弯矩承载能力是常规钢-混凝土组合桥面板的约72%和1.36倍。在试验结果的基础上,建立了等厚超薄T型肋钢-混凝土组合桥面板的负弯矩承载能力实用计算公式,试算对比表明该公式具有工程适用性。In order to study the mechanical performance of the equal-thickness and ultra-thin T-ribbed steel-concrete composite bridge deck applied in the negative bending moment section of the bridge,a full-scale model static test was carried out,and deformation,strain,concrete cracks,ultimate bearing capacity of the bridge deck under the action of negative bending moment was tested.The research results show that the new steel-concrete composite bridge deck exhibits a typical bending failure mode under the action of negative bending moment,and conforms to the assumption of plane section.The weight and negative moment bearing capacity of the deck are 72%and 1.36 times that of conventional steel-concrete composite bridge decks.On the basis of the test results,a practical calculation formula for the negative moment bearing capacity of the equal-thickness and ultra-thin T-ribbed steel-concrete composite deck is established,and the comparison of trial calculations shows that the formula has engineering applicability.

关 键 词:钢-混组合桥面板 T型肋 负弯矩 实用计算公式 

分 类 号:TU375.2[建筑科学—结构工程]

 

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