双层板桁结合钢桁梁桥面结构体系受力性能研究  

Mechanical Study of Deck System of Double Deck-Truss Composite Steel Truss Girder

作　　者：丛霄 CONG Xiao

机构地区：[1]上海市政工程设计有限公司,上海200438

出　　处：《上海公路》2024年第1期40-44,M0004,M0005,共7页Shanghai Highways

摘　　要：为研究双层板桁结合钢桁梁桥面结构体系的受力特性,以清水塘大桥主梁——双层板桁结合钢桁梁为背景,研究了恒载、车辆荷载作用下,其上、下层桥面结构系(纵横梁体系)各构件的受力情况,并分析了车辆荷载的纵向传力范围,以及大、小横梁和桥面板在传递桥面荷载时的分配关系。通过分析,验证了纵横梁桥面结构系受力的合理性,得出了恒载及车辆荷载下的主桁以节点受力为主的结论,符合桁架梁受力特点。此外,得出了桥面系各构件在传递桥面荷载时的分配关系,为相关工程的设计提供了参考和依据。In order to figure out the mechanical characteristics of the double-deck steel truss girder,based on the girder of Qingshuitang Bridge which has bridge double-deck and steel truss combined,stress of each component of both upper and lower deck system under dead load and vehicle load are studied in the article.In addition,longitudinal force transmission range of vehicle load and distribution relationship of deck system are also analyzed.Through the analysis,the rationality of the stress of the bridge surface system is verified,and the main girder under constant load and vehicle load is mainly stressed by the node,which accords with the stress characteristics of the truss beam.The distribution relationship between the components of the bridge deck system when transferring the bridge deck load is obtained,which provides reference and basis for the design of related engineering.

关 键 词：桁架拱桥 钢桁架 纵横梁体系 荷载分配 

分 类 号：U443.31[建筑科学—桥梁与隧道工程]