【作者】 马超；

【导师】 王有志；

【作者基本信息】 山东大学 ， 建筑与土木工程（专业学位）， 2015， 硕士

【摘要】 随着国民经济的发展,人民生活水平的提高,对高速公路的需求逐年增加,高速立交桥就不可避免地出现,极大缓解了城市交通的压力。预应力混凝土连续梁桥以结构受力性能好、变形小、伸缩缝少、行车平顺舒适、造型简洁美观、养护工程量小、抗震能力强等优势,在跨度100-200m的桥梁中最具竞争力。大跨度连续梁桥多采用悬臂施工工艺,施工过程复杂,影响因素多,成桥状态偏离设计要求的状况时有发生。为确保桥梁良好的线形和合理的受力状态,桥梁的施工控制必不可少。本文以某跨高速公路分离立交桥为工程背景,介绍了某跨高速分离立交桥施工监控的方案；介绍了悬臂挂篮施工过程中的基本理论；建立了大桥有限元结构计算模型,并进行了施工阶段结构分析,有效掌握了大桥各施工阶段的应力和变形状态,为大桥的施工控制提供了可靠的理论依据。本文对施工控制过程中线形的控制进行了重点探讨,根据分离立交桥的工程实际施工进度、箱梁高程变化、混凝土养护时间、施工温度等对实测数据进行修正,在其中考虑了材料参数、施工温度等影响因素。通过高程和应力实际观测值与理论值的比较,研究表明,某跨高速分离立交桥施工控制采用的MIDAS CIVIL有限元仿真模型有效可行,大桥成桥后高程和应力状态满足设计要求,桥梁线形流畅美观,施工监控的任务得以圆满完成。更多还原

【Abstract】 With the development of the national economy and people’s living standards improve, the demand increases every year for highway, high-speed overpass will inevitably arise, greatly ease the pressure on urban traffic. Prestressed concrete continuous bridge with the force structure of good performance, small deformation, less expansion joints, driving comfort and comfortable, simple and beautiful shape, small amount of maintenance engineering, seismic capability and other advantages in a span of 100 bridges in the most competitive 200m. It has occurred long span continuous beam bridge cantilever construction more complex structure, the construction process and more many factors, to bridge the state off-design condition requirements. To ensure good bridge linear and reasonable stress state, the construction of the bridge control is essential.Taking a freeway overpass separate engineering background, it introduced a high-speed separation overpass construction monitoring program; cantilever Cradle introduced the basic theory of the construction process; the establishment of a bridge finite element simulation model, and the structural analysis of construction stages effective control of the stress and strain state of the construction phase of the bridge, the bridge construction control provides a reliable theoretical basis.In this paper, the construction linear control process focuses on the control, according to the actual separation overpass project construction schedule, box beam elevation changes, concrete curing time, construction of temperature on the measured data is corrected, in taking into account the material parameters and construction temperature and other factors.By comparing the observed elevation and stress the theoretical value, the study shows, MIDAS CIVIL finite element model of a high-speed separation overpass construction is controlled by the effective and feasible, elevation and stress state of the bridge is a bridge to meet the design requirements, the bridge linear smooth appearance, construction monitoring tasks to be completed successfully.更多还原