拱梁组合桥梁芯形区域施工受力特性研究  

Study on the construction force characteristics of the coreregion of arch beam composite bridge

作　　者：曹晔 李星新 谢兴华 蔡巧 CAO Ye;LI Xingxin;XIE Xinghua;CAI Qiao(China Railway No.4 Engineering Group Co.,Ltd,Hefei,Anhui 230041,China;College of Civil Engineering,Hunan City University,Yiyang,Hunan 413000,China;Hunan Future-bridge Technology Co.,Ltd,Changsha,Hunan 410000,China)

机构地区：[1]中铁四局集团有限公司,合肥230041 [2]湖南城市学院土木工程学院,湖南益阳413000 [3]湖南未来桥科技有限公司,长沙410029

出　　处：《湖南城市学院学报（自然科学版）》2024年第2期12-17,共6页Journal of Hunan City University:Natural Science

摘　　要：以拱梁组合桥梁芯形区域为研究对象,开展了该区域施工过程中的受力分析及圆盘式盘扣支架在竖向和水平不平衡荷载作用下的强度和稳定性分析,并针对芯形区域结构受力存在开裂的安全隐患这一问题,提出了增设临时拉索与圆盘式盘扣支架进行芯形区域施工的组合方案。研究结果表明:1)增加临时拉索能有效减小芯形区域上翼缘拉应力,改善上翼缘受力状态防止区域下部开裂;2)圆盘式盘扣支架与临时拉索组合施工,其中临时拉索可调节盘扣支架支撑下的区域施工应力及变形分布,其影响效果显著,且组合方案施工下的稳定性、强度及变形均在合理范围内。Taking the core area of arch-beam composite bridge as the research object,the stress analysis in the construction process of this area and the strength and stability of disc buckle bracket under vertical and horizontal unbalanced loads are carried out.And a combined scheme of adding temporary cables and disc buckle brackets for the construction of the core area is proposed to solve the problem that the structure in the core area is cracked.The results show that:1)adding temporary cables can effectively reduce the tensile stress of the upper flange of the core area,improve the stress state of the upper flange and prevent the lower part of the area from cracking;2)The disc buckle bracket is combined with temporary cables,and the temporary cables can adjust the stress and deformation distribution in the area supported by the buckle bracket,which has a remarkable influenceeffect,and the stability,strength and deformation of the combined scheme are within a reasonable range.

关 键 词：拱梁组合桥 芯形区域 受力特性 盘扣支架 临时拉索 

分 类 号：U445[建筑科学—桥梁与隧道工程]