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。
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.
出处
《重庆交通大学学报（自然科学版）》
CAS
北大核心
2013年第S1期836-838,883,共4页
Journal of Chongqing Jiaotong University(Natural Science)
基金
云南省交通厅科技项目﹝云交科2010(A)03-61﹞
关键词
旧桥拓宽
受力性能
承载潜力
横向分布系数
梁格法
widen bridge structure
mechanical performance
potential load bearing capacity
load lateral distribution factor(LLDF)
beam-and-girder method
