【作者】 王平；

【导师】 周世军；

【作者基本信息】 重庆大学 ， 土木工程， 2012， 硕士

【摘要】 预应力混凝土连续刚构桥其梁墩固结，既保持了连续梁行车平顺舒适的优点，又保持了T型刚构不设支座减少养护工作量的优点，近年来得到了迅速发展。连续刚构桥通常采用悬臂施工法进行施工，为了保证施工过程中桥梁的线形和内力符合设计要求以及施工的安全，必须对桥梁施工进行监控。本文以漠谷河2号桥为工程背景，主要完成了以下内容：(1)对连续刚构桥以及施工控制分别进行了简要的介绍，主要包括：连续刚构桥的发展以及特点；施工控制的重要性、内容以及影响因素。(2)介绍了施工仿真分析过程中用到的理论，包括施工控制的计算方法、有限元理论、混凝土收缩徐变以及温度效应等。(3)运用有限元软件CSRB和MIDAS/Civil建立杆系模型，对桥梁进行仿真分析。将两个软件的内力计算结果对比进行了复核，其结果比较一致；并对各个施工阶段的位移和线形进行了分析。(4)在线形控制方面，介绍了立模标高的计算、线形测点的布置以及测量，并将现场实测标高与设计标高进行了对比；在应力控制方面，介绍了应力测量仪器的选择、应力传感器的埋置以及应力测点的布置，并将现场实际测得的应力与理论计算应力进行了对比。(5)针对刚构桥零号块受力比较复杂，在施工过程中容易出现裂缝这一问题，运用ANSYS软件对漠谷河2号桥零号块进行局部应力分析。介绍了实体模型的建立过程，从MIDAS计算结果中提取的荷载进行加载计算，对顶板、底板、腹板以及横隔板的应力进行了分析，并结合应力分析结果明确了零号块可能出现裂缝的位置。更多还原

【Abstract】 In recent years, prestressed concrete continuous rigid frame bridge, which has aproperty of bond of beam and abutment, not only maintain the advantage of comfort ofcontinuous girder, but also decrease maintenance cost because that there is no bearing of"T" rigid frame, which has been developed rapidly. Continuous rigid frame bridgenormally uses cantilever construction method, and in order to ensure bridge alignmentand internal forces to meet design requirements and construction safety during theconstruction process, the construction of the bridge must be monitored.This article takes the No.2Bridge across the Mogu River as research background,and the main contents are as follows:(1) Introduce continuous rigid frame bridge and construction control briefly. Itincludes: development and features of continuous rigid frame bridge; the importance,contents and influencing factors of construction control.(2) Introduce the theory which is used in the process of construction simulationanalysis. It includes: the computational method on construction control, the finiteelement theory, the concrete shrinkage and creep and the temperature effect.(3) Utilize the finite element software CSRB and MIDAS/Civil to establish thetruss model, and carry out the bridge simulation analysis.The internal force resultswhich are calculated by the two software are compared and the results are moreconsistent; also analysis the displacement and linear of every construction phase.(4) In the alignment monitoring part, introduce the calculation of formworkelevation, lay out and measure the alignment survey points, and also compare the sitemeasured elevation with the design elevation. In the part of stress control, the choice ofstress measurement instrument, the embedment of stress sensor and the layout of thestress points are presented, and the actual measured stresses are compared with thecalculated stresses as well.(5) Because forces of rigid frame bridge zero-block are quite complex and it isprone to crack in construction process, analysis of partial stress for the zero-block of theNo.2Bridge across the Mogu River is carried out by ANSYS program. And it alsointroduces the establishment process of solid model, calculates the loading whichextracts from MIDAS results, analyzes stress of the roof, floor, web and diaphragm, andit finally comes up with locations of possible cracks on the zero-block with the combination of the stress analysis results.更多还原