| 连续PC刚构桥下挠变形敏感因素分析 |
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| 引用本文： | 郝天之,张玉新,李世深. 连续PC刚构桥下挠变形敏感因素分析[J]. 西部交通科技, 2009, 0(12): 71-74 |
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| 作者姓名： | 郝天之 张玉新 李世深 |
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| 作者单位： | 1. 广西交通科学研究院,广西,南宁,530007;广西大学土木建筑工程学院,广西,南宁,530004
2. 广西大学土木建筑工程学院,广西,南宁,530004 |
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| 基金项目： | 广西壮族自治区交通厅课题 |
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| 摘 要： | 连续PC刚构桥施工过程中受力复杂，变形影响因素众多。文章以在建的罗天乐大桥为例，从收缩徐变、张拉龄期、弹性模量、容重、预应力参数等方面进行参数影响量分析，指出大跨度连续刚构桥线形控制中须重点关注的参数．并介绍了减少跨中下挠的设计与施工方法。
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| 关 键 词： | 下挠变形 徐变 弹性模量 |
Analysis on Deformation Factors of PC Continuous Rigid Bridge |
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| HAO Tian-zhi,ZHANG Yu-xin,LI Shi-shen. Analysis on Deformation Factors of PC Continuous Rigid Bridge[J]. Western China Communication Science & Technology, 2009, 0(12): 71-74 |
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| Authors: | HAO Tian-zhi ZHANG Yu-xin LI Shi-shen |
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| Affiliation: | HAO Tian-zhi , ZHANG Yu-xin, LI Shi-shen (1. Guangxi Academy of Communications, Nanning 530004; 2. College of Civil Engineering and Architecture, Guangxi University, Nanning, Guangxi, 530084) |
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| Abstract: | A large number of factors have influence the deformation of PC continuous rigid frame bridge.Set Luotianle Bridge as an example,the article analyzes the influence quantity from the perspective of tensioning age, modulus of elasticity, bulk density of concrete and prestress parameter.The article brings up the major issues that needs to be concerned in line shape controlling, and also introduces the design and construction methods that used to decrease downwarping effect. |
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| Keywords: | Deformation Creep Modulus of elasticity |
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