2010, Volume 12, Issue 4
Strategic Study of CAE >> 2010, Volume 12, Issue 4
Mechanism and control of existing faults on long-span concrete continuous system bridges in China
1. CCCC second Highway Engineering Co., LTD., Xi'an 710065, China;
2. Jiangsu Provincial Yangtze River Highway Bridge Construction Commanding Department, Taizhou, Jiangsu 225321, China
Next Previous
Abstract
Since 1980's, a lot of long-span prestressed concrete continuous system bridges have been constructed in China, and great success has been achieved. However, with the increase of numbers and service life of bridges, some similar diseases have been showed in this kind of bridges in succession. In this paper, the forms of many typical faults like excessive deflection in the mid-span, box beam crack and bottom slab stripping in the closure segment of mid-span, etc., have been summarized. And the characteristics of these faults' happening time, trend of development and distribution form have been pointed out. Their causes and corresponding prevention countermeasures have been analyzed. At last the direction which needs further study about the theory of computation and the measures which should be taken in design have been figured out .
Keywords
prestressed ; concrete ; continuous bridge ; fault ; control method
References
[ 1 ] 赵启林,周旺进,江克斌.预应力混凝土箱梁桥施工中的裂缝成因分析与修补[J].公路交通科技,2006,6(23):82-92 link1
[ 2 ] 曹三鹏,刘钊,岳力强.移动模架施工PC连续梁桥悬臂段箱梁空间效应不利影响及其防治措施[J].公路交通科技,2006,12(23):90-94 link1
[ 3 ] 包立新,杨广来,杨文军.对连续刚构桥底板开裂问题的探讨[J].公路,2004,(8):43-45 link1
[ 4 ] 潘大荣,赵启林,王景全,等.预应力混凝土连续箱梁合拢段底板开裂机理[J].解放军理工大学学报(自然科学版),2008,9(5):552-555 link1
京公网安备 11010502051620号
