Overcoming post-downwarping of long span PC continuous rigid
frame girder by design measures

Journal of Chongqing Jiaotong University(Natural Science) ›› 2006, Vol. 25 ›› Issue (6): 4-7.

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Overcoming post-downwarping of long span PC continuous rigid frame girder by design measures

LIU Shan-hong^1,2

1.Post Doctor Station of Trmmpotatlon and Traffic school，Southwest Jiaotong University，Chengdu 610031，China 2.School of Civil Ertgineefing& Architecture，Chongqing Jiaotong University Chongqing 400074，China

Received:2005-08-25 Revised:2005-10-17 Online:2006-12-15 Published:2015-05-18

克服大跨PC连续刚构桥后期下挠设计措施

刘山洪^1,2

1.西南交通大学交通运输工程博士后流动站，四川成都 610031；2.重庆交通大学土木建筑学院，重庆 400074

作者简介:刘山洪(1968—)，男，重庆垫江人，博士后，从事高性能预应力砼桥梁结构行为及计算理论方面研究

Abstract

Abstract: Comparing with the design parameters of several long span prestressed concrete continuous rigid frame girders，which have excessive downwarping caused by girder cracking，the main reasons of causing Order downwarping are presented．In order to improve the permanent shear carrying capacity of box girder，design parameters of improving structural measures are proposed Specific measures．which can overcome the continual post—downwarpings of box girders．are presented．They can also guarantee girders in health states efectively．

Key words: prestrcssed Concrete, continuous rigid flame girder, box girder, design, camber

摘要： 对比分析几座大跨径预应力连续刚构桥后期下挠过度引起粱体开裂的主要设计参数，阐述了引起后期下挠的主要原因．为提高箱梁持久抗剪承载力，提出构造措施上可供参考的设计参数，并提出克服箱梁后期持续下挠的具体措施，有效地保障梁体处于健康状态．

关键词: 预应力砼, 连续刚构桥, 箱梁, 设计, 预拱度

CLC Number:

LIU Shan-hong. Overcoming post-downwarping of long span PC continuous rigid frame girder by design measures[J]. Journal of Chongqing Jiaotong University(Natural Science), 2006, 25(6): 4-7.

刘山洪. 克服大跨PC连续刚构桥后期下挠设计措施[J]. 重庆交通大学学报（自然科学版）, 2006, 25(6): 4-7.

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Overcoming post-downwarping of long span PC continuous rigid frame girder by design measures

克服大跨PC连续刚构桥后期下挠设计措施

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