全无缝化桥梁接线路面温升效应及端部位移计算-中南大学学报.PDF

第 47 卷第 10 期 中南大学学报( 自然科学版) Vol.47 No.10 2016 年 10 月 Journal of Central South University (Science and Technology) Oct. 2016 DOI: 10.11817/j.issn.1672-7207.2016.10.034 全无缝化桥梁接线路面温升效应及端部位移计算 李嘉，赵乾文，邵旭东 (湖南大学 土木工程学院，湖南 长沙，410082) 摘要：为防止全无缝化桥梁体系对后续普通路面产生不利影响，开展无缝桥梁接线路面温升效应研究。建立温升 状况下加筋接线路面计算模型，推导加筋接线路面受力、位移理论计算公式；通过分析锚固地梁结构受力变形机 理，引入矩阵位移法，得到 1~3 道地梁端部位移与端部力的关系式。采用 VB 语言编制程序，计算接线路面板截 面应力及其位移。研究结果表明：解析法所得接线路面板压应力与实桥监测压应力的相对误差为 0.2%~14.4%， 两者较接近，说明理论分析方法可用于全无缝化桥梁接线路面应力与位移计算；在最大温升情况下，路面板压应 力小于材料抗压强度标准值；锚固地梁结构能有效控制端部位移。 关键词：道路工程；无缝桥梁；接线路面；受力分析；温度效应；锚固地梁 中图分类号：U416.22 文献标志码：A 文章编号：1672−7207(2016)10−3538−08 Research on temperature effect and anchor deformation for approach pavement of jointless bridge LI Jia, ZHAO Qianwen, SHAO Xudong (College of Civil Engineering, Hunan University, Changsha 410082, China) Abstract: In order to prevent jointless bridge system from adverse impacts on the normal pavement, the temperature effect was studied for approach pavement behind the bridge abutment. Calculation model of the reinforced pavement slab was proposed, and the theoretical formulas for the slab stress and deformation was derived. After analyzing the mechanical mechanism of anchored ground beam structure, a matrix displacement method was introduced to obtain the relations between the anchor force and deformation at approach pavement end suiting to 1−3 ground beams. VB computer program was compiled to calculate the approach slab stress and deformation. The results show that the stress