预应力混凝土连续梁桥的摩阻系数研究
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摘要
在大跨度连续桥梁施工中,预应力混凝土梁的预应力损失必不可少。针对摩阻损失,介绍了管道摩阻损失试验的原理和方法,由规范给定的公式,应用最小二乘法原理,推导得出摩阻系数μ和管道偏差系数k的计算公式。结合实际桥梁工程,进行管道摩阻试验的现场测试,得出实际的管道摩阻系数,然后与设计值进行比较,分析测试方法的合理性和测试结果的可靠性,为施工的监控给予一定的参考。
The prestress loss of prestressed concrete beams is indispensable in the construction of large span continuous Bridges. For friction loss,this paper introduces the friction loss test principle and method of pipeline by the formula given by specification,the basis of the principle of least square method,derived friction coefficient calculation formula of μ and pipe deviation coefficient k. Combined with the actual bridge project,field test of pipe friction experiment,it is concluded that the actual pipeline friction coefficient,and then compared with the designed value,the rationality of analysis method and the reliability of test results,offer certain reference for the construction monitoring.
The prestress loss of prestressed concrete beams is indispensable in the construction of large span continuous Bridges. For friction loss,this paper introduces the friction loss test principle and method of pipeline by the formula given by specification,the basis of the principle of least square method,derived friction coefficient calculation formula of μ and pipe deviation coefficient k. Combined with the actual bridge project,field test of pipe friction experiment,it is concluded that the actual pipeline friction coefficient,and then compared with the designed value,the rationality of analysis method and the reliability of test results,offer certain reference for the construction monitoring.
引文
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[8]张洪海,王金源.铁路160m刚构预应力孔道摩阻试验分析[J].西部交通科技,2014(12):64-70.
[9]郑国庆,赵晓健,王卫锋.东江南特大桥预应力孔道摩阻损失试验研究[J].建筑监督检测与造价,2009(08):10-12.
[10]王涛,张汉平,钟穗东,等.桥梁预应力摩阻试验研究方法与研究.科学技术与工程,2009;9(19):5717-5720.
[11]牛黎明.大跨度PC连续梁桥预应力管道摩阻研究[J].城市道路与防洪,2017(08):90-92.
[12]员宝珊,李登科,孙帅峰.乌准铁路56 m预应力连续箱梁管道摩阻试验研究[J].铁道建筑,2017(04):32-34.
[2]振春,孙桂云,赵迎萍.后张预应力混凝土梁管道摩阻及测试[J].西部探矿工程,2001(3):25-27.
[3]张伟雄.后张T梁预应力筋管道摩阻损失测试与分析[J].科技情报开发与经济,2001,11(1):67-68.
[4]洪拱辰.现代预应力混凝土结构[M].北京:中国建筑工业出版社,1988.
[5]TB10002.3-2005,铁路桥涵钢筋混凝土和预应力混凝土结构设计规范[S].
[6]JTG D62-2004,公路钢筋混凝土及预应力混凝土桥涵设计规范[S].
[7]杨欧峰,端茂军,魏洋,等.预应力混凝土连续梁桥管道摩阻试验研究及参数分析[J].中外公路,2016,36(4):149-153.
[8]张洪海,王金源.铁路160m刚构预应力孔道摩阻试验分析[J].西部交通科技,2014(12):64-70.
[9]郑国庆,赵晓健,王卫锋.东江南特大桥预应力孔道摩阻损失试验研究[J].建筑监督检测与造价,2009(08):10-12.
[10]王涛,张汉平,钟穗东,等.桥梁预应力摩阻试验研究方法与研究.科学技术与工程,2009;9(19):5717-5720.
[11]牛黎明.大跨度PC连续梁桥预应力管道摩阻研究[J].城市道路与防洪,2017(08):90-92.
[12]员宝珊,李登科,孙帅峰.乌准铁路56 m预应力连续箱梁管道摩阻试验研究[J].铁道建筑,2017(04):32-34.