RC梁桥裂缝宽度计算方法研究
发布时间：2019-06-13 21:36
【摘要】：伴随着我国经济快速发展、道路桥梁基础设施建设速度突飞猛进，桥梁结构的裂缝问题日益突出。根据桥梁结构不同设计等级，混凝土是允许有裂缝出现的，，因此混凝土结构带裂缝工作已成为普遍现象。裂缝开裂达到一定值时桥梁结构将会发生破坏。因此，我国规范针对各种不同设计等级的混凝土结构裂缝宽度限值作了相应规定。 混凝土裂缝控制的关键是裂缝宽度，影响裂缝宽度计算的因素很多，要想精确计算裂缝宽度是十分困难的。本文总结了混凝土结构裂缝开裂的主要类型和原因，针对钢筋混凝土试验梁的开裂进行全过程的分析研究，记录试验梁从开裂直到破坏各个试验阶段混凝土的裂缝发展情况。运用裂缝宽度计算的相关理论分析比较了试验梁量测、ADINA有限元分析和《公路桥规》计算裂缝宽度的数据，检测了有限元软件计算裂缝宽度的准确度。最后通过工程实例的有限元分析计算混凝土裂缝宽度来获得桥梁承载能力，为桥梁评估提供新的方法。
[Abstract]:With the rapid development of economy in our country, the construction speed of road and bridge infrastructure is advancing by leaps and bounds, and the crack problem of bridge structure is becoming more and more prominent. According to the different design grades of bridge structure, concrete is allowed to have cracks, so it has become a common phenomenon to work with cracks in concrete structures. When the crack cracking reaches a certain value, the bridge structure will be destroyed. Therefore, the limit value of crack width of concrete structures with different design grades is stipulated in the code of our country. The key to crack control of concrete is crack width. There are many factors that affect the calculation of crack width. It is very difficult to calculate crack width accurately. In this paper, the main types and causes of crack cracking in concrete structure are summarized, the whole process of cracking of reinforced concrete test beam is analyzed and studied, and the development of concrete crack in each test stage from cracking to failure is recorded. The data of test beam measurement, ADINA finite element analysis and highway bridge gauge are analyzed and compared by using the related theory of crack width calculation, and the accuracy of finite element software for calculating crack width is tested. Finally, the bearing capacity of the bridge is obtained by calculating the crack width of concrete through the finite element analysis of an engineering example, which provides a new method for bridge evaluation.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442;U448.34
本文编号：2498832
[Abstract]:With the rapid development of economy in our country, the construction speed of road and bridge infrastructure is advancing by leaps and bounds, and the crack problem of bridge structure is becoming more and more prominent. According to the different design grades of bridge structure, concrete is allowed to have cracks, so it has become a common phenomenon to work with cracks in concrete structures. When the crack cracking reaches a certain value, the bridge structure will be destroyed. Therefore, the limit value of crack width of concrete structures with different design grades is stipulated in the code of our country. The key to crack control of concrete is crack width. There are many factors that affect the calculation of crack width. It is very difficult to calculate crack width accurately. In this paper, the main types and causes of crack cracking in concrete structure are summarized, the whole process of cracking of reinforced concrete test beam is analyzed and studied, and the development of concrete crack in each test stage from cracking to failure is recorded. The data of test beam measurement, ADINA finite element analysis and highway bridge gauge are analyzed and compared by using the related theory of crack width calculation, and the accuracy of finite element software for calculating crack width is tested. Finally, the bearing capacity of the bridge is obtained by calculating the crack width of concrete through the finite element analysis of an engineering example, which provides a new method for bridge evaluation.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442;U448.34
【参考文献】
相关期刊论文 前1条
1 宋玉普,赵国藩;钢筋混凝土构件裂缝宽度的有限单元法分析[J];大连工学院学报;1985年04期
本文编号：2498832
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