Influence of Widening and Ｒenovation on Mechanical Performance of Old Bridges

doi:10.3969/j.issn.1674-0696.2013.sup.1.26

Journal of Chongqing Jiaotong University(Natural Science) ›› 2013, Vol. 32 ›› Issue (增1): 836-838.DOI: 10.3969/j.issn.1674-0696.2013.sup.1.26

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Influence of Widening and Ｒenovation on Mechanical Performance of Old Bridges

Chang Guoqiang¹，Zhang Changqing¹，Hu Wenhua²，Wang Peng¹

1.China Merchants Chongqing Communications Ｒesearch ＆ Design Institute Co.Ltd.，Chongqing 400067，China; 2.Yunnan Highway Science ＆ Technology Ｒesearch Institute，Kunming 650051，Yunnan，China

Received:2013-02-01 Revised:2013-07-05 Online:2013-06-30 Published:2015-03-12

拓宽改造对旧桥受力性能的影响分析

常国强¹，张长青¹，胡文华²，王鹏¹

1.招商局重庆交通科研设计院有限公司，重庆400067;2.云南省公路科学技术研究院，云南昆明650051)

作者简介:常国强(1980—)，男，山东淄博人，工程师，硕士，主要从事桥梁设计、科研、咨询等工作。E-mail:guoq_chang@163.com.
基金资助:
云南省交通厅科技项目﹝云交科2010( A) 03-61 ﹞

Abstract

Abstract: Concrete T-beam and hollow slab bridges have been constructed at mountainous areas since years ago，which have to be widened currently due to mass increase traffic volume． By use of load lateral distribution factor ( LLDF) ，the influence of different widening method on the force of bridges with small or medium span was analyzed by beam-and-girder method． The research results indicate that reasonable widening methods can efficiently reduce the potential load bearing capacity and indirectly improve the load bearing capacity of old bridges，which efficiently reduces the construction cost．

Key words: widen bridge structure, mechanical performance, potential load bearing capacity, load lateral distribution factor ( LLDF) , beam-and-girder method

摘要： 早期建设的山区T梁桥、空心板桥由于不能满足急剧增长的交通需求必须拓宽。从荷载横向分布系数入手，利用梁格法分析不同拓宽方式对中小跨径桥梁内力的影响。研究表明:合理的拓宽方案可有效降低旧桥梁体承担的荷载，间接提高旧桥承载裕度，达到少加固或不加固即能满足拓宽提载的要求，有效减少加固费用。

关键词: 旧桥拓宽, 受力性能, 承载潜力, 横向分布系数, 梁格法

CLC Number:

U448.21

Chang Guoqiang，Zhang Changqing，Hu Wenhua，Wang Peng. Influence of Widening and Ｒenovation on Mechanical Performance of Old Bridges[J]. Journal of Chongqing Jiaotong University(Natural Science), 2013, 32(增1): 836-838.

常国强，张长青，胡文华，王鹏. 拓宽改造对旧桥受力性能的影响分析[J]. 重庆交通大学学报（自然科学版）, 2013, 32(增1): 836-838.

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Influence of Widening and Ｒenovation on Mechanical Performance of Old Bridges

拓宽改造对旧桥受力性能的影响分析

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