单片整体预制钢混组合梁结构设计  

Structural Desigh of Research on Single Piece Prefabricated Steel Concrete Composite Beam

作　　者：李光川 宋随弟[1] 张扬 殷峰 LI Guangchuan;SONG Suidi;ZHANG Yang;YIN Feng(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China;China Railway Development Investment Group Co.,Ltd.,Kunming 650504,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031 [2]中铁开发投资集团有限公司,昆明650504

出　　处：《交通科技》2024年第6期65-69,共5页Transportation Science & Technology

摘　　要：整体预制钢混组合梁是将混凝土桥面板、剪力钉、钢主梁同时在场地预制后再吊装上桥(类似于预制T梁),相较于分块预制钢混组合梁,具有结构受力更合理、用钢量少、施工速度快等优点。文中对单片整体预制钢混组合梁结构进行仿真研究,提出将端横梁与主梁同时预制,可解决施工期间横向稳定性问题;对支点负弯矩区混凝土裂缝进行研究,提出采用双支座方案对降低支点处混凝土桥面板应力有一定作用,简化更换临时支座的流程,便于快速施工。The overall prefabricated steel-concrete composite beam is a method of prefabricating concrete bridge deck panels,shear studs,and steel main beams on site and then hoisting them onto the bridge(similar to prefabricated T-beams).Compared to segmented prefabricated steel-concrete composite beams,it has the advantages of more reasonable structural stress,less steel consumption,and faster construction speed.A simulation study on the structure of a single piece prefabricated steel-concrete composite beam was conducted,and prefabricating the end crossbeam and main beam simultaneously was proposed to solve the lateral stability problem during construction.A study was conducted on concrete cracks in the negative bending moment zone of the support point,and a dual support scheme was proposed to reduce the stress on the concrete bridge deck at the support point,reducing the need to replace temporary supports and facilitating rapid construction.

关 键 词：钢混组合梁 整体预制 分块预制 受力性能 用钢量 

分 类 号：U441[建筑科学—桥梁与隧道工程]