| 梁桥恒载跨中挠度允许值[ft]确定 |
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| 引用本文： | 戴广鹏,任亮,郭圣栋.梁桥恒载跨中挠度允许值[ft]确定[J].交通与计算机,2012,30(2):16-19,45. |
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| 作者姓名： | 戴广鹏 任亮 郭圣栋 |
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| 作者单位： | 1. 华东交通大学土建学院 南昌330013
2. 江西省交通设计院 南昌330026 |
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| 基金项目： | 江西省交通厅科技项目（批准号：Z200509）资助 |
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| 摘 要： | 长期以来,我国桥规对梁桥恒载跨中挠度允许值ft]空缺;一般均用活载挠度fp=L/600]来代替。这是造成中国PC连续梁跨中普遍下挠、底板开裂的一个重要原因。文中提出设计应控制合龙前初始挠度f0]≤L/4 800才能确保桥梁安全。
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| 关 键 词： | 恒载 零弯矩 零挠度 |
Determination of Allowable Value of Constant Load Deflection [f_t] for Girder Bridge |
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| DAI Guangpeng
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REN Liang
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GUO Shengdong.Determination of Allowable Value of Constant Load Deflection [f_t] for Girder Bridge[J].Computer and Communications,2012,30(2):16-19,45. |
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| Authors: | DAI Guangpeng REN Liang GUO Shengdong |
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| Institution: | 1.College of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China;2.Traffic Design Institute of Jiangxi Province,Nanchang 330026,China)) |
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| Abstract: | For a long time,there is a vacancy of the deflection value ft] for girder bridge across the rules in China,which is often replaced by deflection f p = L/600 ] instead.This is one of the major reasons for beam deflection and bottom cracking of Chinese PC continuous girder bridge.The paper puts forward that the design should be folded control with initial deflection f0] no more than L/4800to ensure the safety of bridge. |
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| Keywords: | permanent load zero moment zero deflection |
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