简支钢混组合梁新型桥面连续结构的力学性能参数分析  

Mechanical Properties and Parametric Analysis of a New Type of Continuous Deck Structure of Simply Supported Steel-concrete Composite Beam Bridge

作　　者：王清泉 曹沛 邓青儿 WANG Qingquan;CAO Pei;DENG Qing’er(Tongji Architectural Design(Group)Co.,Ltd.,Shanghai 200092,China)

机构地区：[1]同济大学建筑设计研究院(集团)有限公司,上海200092

出　　处：《结构工程师》2023年第4期35-44,共10页Structural Engineers

摘　　要：提出了一种新型桥面连续结构,以匹配倒T形盖梁的简支组合槽梁为例,对其进行了力学性能分析,并总结了桥面连续结构与主梁间的竖向支承刚度、无粘结长度、桥面板板厚等参数对其受力性能的影响。结果表明:①桥面连续结构与主梁间的竖向支承刚度对其受力模式影响较大,采用脱空设计时桥面连续结构受力更为明确可控;②随着无粘结长度的增加,桥面连续结构受力先降后增,无粘结长度控制在相邻跨径之和的5%较佳;③随桥面连续结构厚度增加,其受力逐渐增加,找到桥面板连续结构受力与抗力平衡是其设计的关键;④桥面连续结构设置与否对简支梁整体受力影响有限。In this paper,a new type of continuous deck structure of simply supported steel-concrete composite beam bridge is presented.Take the steel-concrete composite beam bridge which is supported on an inversed-T bent cap for example,the main factors that affect the design of this new type of continuous deck structure are summarized,including vertical bearing stiffness between the continuous deck structure and the main beam,undebonded length and thickness.The results show that:(1)The vertical bearing stiffness between the continuous deck structure and the main beam has obvious impact on its stress mode,and the stress of the continuous deck structure is more clear and controllable when detached design is adopted;(2)With the increase of unbonded length,the stress of the continuous deck structure decreases first and then increases and the unbonded length is better to be controlled at 5%of the sum of adjacent spans;(3)With the increase of the thickness of the continuous deck structure,its stress gradually increases,and the balance between the force and resistance of the continuous deck structure is critical for the design;(4)Whether the continuous deck structure is set or not has a limited influence on the overall stress of simply supported beams.

关 键 词：钢混组合梁 桥面连续结构 无粘结长度 竖向支承刚度 

分 类 号：U443.31[建筑科学—桥梁与隧道工程]