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| 大跨度混凝土梁桥的合理成桥状态设计方法 | |
| 引用本文： | 刘钊,戴玮,贺志启,吉林,李准华,赵君黎.大跨度混凝土梁桥的合理成桥状态设计方法[J].桥梁建设,2010(1). |
| 作者姓名： | 刘钊 戴玮 贺志启 吉林 李准华 赵君黎 |
| 作者单位： | 1. 东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏,南京,210096 2. 江苏省长江公路大桥建设指挥部,江苏,南京,210004 3. 中交公路规划设计院有限公司,北京,100088 |
| 基金项目： | 江苏省交通科学研究计划项目 |
| 摘 要： | 针对采用节段悬浇施工的大跨度混凝土梁桥普遍存在的持续下挠问题,提出基于荷载效应平衡的"合理成桥状态"概念以及相应的预应力配筋设计方法。通过合理的纵向预应力配置去适度平衡多种作用效应,使桥梁处于合理的成桥状态(弯曲状态、应力状态和挠曲状态),以便能够抑制跨中长期下挠。此外,还提出控制最大压应力水平和采用体内-体外混合配束的设计策略。结合持续下挠的机理讨论,认为合理成桥状态是一种能有效抑制桥梁下挠的实用设计方法。 |
| 关 键 词： | 混凝土梁桥 合理成桥状态 预应力 下挠 桥梁设计 |
Design Method for Rational Completion Status of Long Span PC Girder Bridges |
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| LIU Zhao,DAI Wei,HE Zhi-qi,JI Lin,LI Zhun-hua,ZHAO Jun-li.Design Method for Rational Completion Status of Long Span PC Girder Bridges[J].Bridge Construction,2010(1). | |
| Authors: | LIU Zhao DAI Wei HE Zhi-qi JI Lin LI Zhun-hua ZHAO Jun-li |
| Institution: | LIU+Zhao1,DAI+Wei1,HE+Zhi-qi1,JI+Lin2,LI+Zhun-hua3,ZHAO+Jun-li3(1.Key+Laboratory+of+Concrete+,+Prestressed+Concrete+Structures+of+Ministry+of+Education,Southeast+University,Nanjing+210096,China,2.Jiangsu+Provincial+Yangtze+River+Highway+Bridge+Construction+Comm,ing+Department,Nanjing+210004,3.CCCC+Highway+Consultants+Co.,Ltd.,Beijing+100088,China) |
| Abstract: | In the light of the sustained defection deterioration commonly existing in the long span prestressed concrete(PC) girder bridges constructed by the segmental cantilever casting method,the concept of the rational completion status based on the load effect balancing principle and the corresponding design method for arrangement of prestressing are proposed.By way of the rational arrangement of the longitudinal prestressing,the different actions of various effect will be balanced to an appropriate degree and th... |
| Keywords: | concrete girder bridge rational completion status prestressing deflection bridge design |
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