钢筋桁架叠合板施工阶段参数分析  

Parametric Analysis of Composite Slab with Steel Bar Trusses at Construction Stages

作　　者：张俊豪 贺君[1] 谭超 奉思东 王梓桐 ZHANG Junhao;HE Jun;TAN Chao;FENG Sidong;WANG Zitong(Changsha University of Science&Technology,Changsha,Hunan 410114,China;CCCC-SHEC West China Construction Co.,Ltd.,Chengdu,Sichuan 611930,China;Hunan Provincial Communications Planning,Survey&Design Institute Co.,Ltd.,Changsha,Hunan 410200,China)

机构地区：[1]长沙理工大学,湖南长沙410114 [2]中交二公局华西建设有限公司,四川成都611930 [3]湖南省交通规划勘察设计院有限公司,湖南长沙410200

出　　处：《中外公路》2025年第1期235-243,共9页Journal of China & Foreign Highway

基　　金：国家自然科学基金资助项目(52378127);湖南省自然科学基金杰出青年基金资助项目(编号:2022JJ10049)。

摘　　要：为明确钢筋桁架叠合板在吊装和后浇层浇筑等施工关键阶段的受力性能,该文以格鲁吉亚E60高速公路上某主跨60 m组合梁桥为研究对象,采用ABAQUS建立有限元模型开展施工过程模拟,分析预制底板材料、吊点数量、板厚和钢筋桁架榀数等参数对混凝土主应力和跨中挠度的影响。结果表明:预制底板使用超高性能混凝土(UHPC)材料时,未出现塑性损伤,且能有效提高预制底板刚度;普通混凝土(NC)预制底板宜采用6个及以上吊点进行吊装,而UHPC预制底板则只需使用4个吊点;增加预制底板厚度会增加吊装阶段混凝土最大主应力,但对后浇层浇筑阶段的混凝土最大主应力几乎没有影响;增加预制底板中钢筋桁架榀数可降低吊装阶段中的混凝土最大主应力,后浇层浇筑阶段中混凝土最大主应力及跨中挠度随钢筋桁架榀数的增加而减小。该研究结果可为钢筋桁架叠合板的吊装和后浇层浇筑提供参考,并为UHPC-NC叠合板的实际应用提供支持。To clarify the structural behavior of composite slab with steel bar trusses at key construction stages including hoisting and concrete post-pouring,a composite beam bridge with a main span of 60 m in Georgia’s E60 Highway was investigated.A finite element model was developed by using ABAQUS to simulate the construction process and analyze the influence of parameters such as prefabricated bottom slab material,number of hoisting points,slab thickness,and number of steel bar trusses on the principal stress of concrete and mid-span deflection.The results indicate that ultra-high-performance concrete(UHPC)prefabricated bottom slabs prevent plastic damage and enhance slab stiffness.Normal concrete(NC)prefabricated bottom slabs should set six or more hoisting points,while UHPC prefabricated bottom slabs require only four hoisting points.Increasing slab thickness can raise the concrete’s maximum principal stress at the hoisting stage,but it has a negligible impact at the concrete post-pouring stage.Increasing the number of steel bar trusses in the prefabricated bottom slabs can reduce the concrete’s maximum principal stress at the hoisting stage,and both the concrete’s maximum principal stress and mid-span deflection decrease at the concrete post-pouring stage with the increase in the number of steel bar trusses.These research findings may provide a reference for the hoisting and concrete post-pouring of composite slabs with steel bar trusses and support the actual application of UHPC-NC composite slabs.

关 键 词：桥梁工程 钢筋桁架叠合板 脱模吊装 后浇层浇筑:超高性能混凝土 

分 类 号：U448.216[建筑科学—桥梁与隧道工程] U443.31[交通运输工程—道路与铁道工程]