| PC连续箱梁桥裂缝影响因素分析 |
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| 引用本文： | 邹毅松,周鹏,王银辉,彭卫.PC连续箱梁桥裂缝影响因素分析[J].交通标准化,2011(16):94-99. |
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| 作者姓名： | 邹毅松 周鹏 王银辉 彭卫 |
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| 作者单位： | 1. 重庆交通大学土木建筑学院,重庆,400074
2. 浙江大学宁波理工学院,浙江 宁波,315100 |
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| 基金项目： | 浙江省交通科技发展基金项目(200133,2004H21) |
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| 摘 要： | 结合工程实桥的裂缝观测、有限元分析结果,系统研究了预应力混凝土连续箱梁桥的裂缝型式与成因、修复与加固措施,提出了防裂设计建议。首先,对连续箱梁桥典型裂缝分布现状进行了分类归纳,系统分析了裂缝产生的主要原因,对引起箱梁开裂的主要因素如纵向预应力束布置方式、竖向预应力大小、温度梯度模式等进行了敏感性分析,表明纵向预应力束布置方式和竖向预应力大小对箱梁腹板斜裂缝的开展起着主要的作用。从预应力筋布置、温度梯度模式的选取、非预应力筋的设置等几方面提出了防裂设计改进建议。
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| 关 键 词： | 桥梁工程 预应力混凝土连续箱梁桥 有限元法 裂缝成因 |
Influencing Factors Analysis on Cracking of PC Continuous Box-Girder Bridges |
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| ZOU Yi-song,ZHOU Peng,WANG Yin-hui,PENG Wei.Influencing Factors Analysis on Cracking of PC Continuous Box-Girder Bridges[J].Communications Standardization,2011(16):94-99. |
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| Authors: | ZOU Yi-song ZHOU Peng WANG Yin-hui PENG Wei |
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| Institution: | ZOU Yi-song1,ZHOU Peng1,WANG Yin-hui2,PENG Wei2(1.School of Civil Engineering and Architecture,Chongqing Jiaotong University,Chongqing 400074,China,2.Ningbo Institute of Technology,Zhejiang University,Ningbo 315100,China) |
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| Abstract: | Based on cracks observation and finite element analysis of real engineering projects as well as bridge load test after reinforcement,causes and types of cracks in prestressed concrete box girder bridges and treating measurements are systematically studied.The results obtained from the calculation are presented to demonstrate the effect of sensitive factors,such as arrangement of longitudinal prestressed tendons,the magnitude of vertical prestressed force,temperature gradient,etc.The results show that the ar... |
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| Keywords: | bridge engineering PC continuous box-girder bridge finite element method causes of cracks |
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