城市高架桥异形宽箱梁空间结构分析  

Three-Dimensional Analysis of Wide Irregular Box-Girders for City Viaduct

作　　者：徐海军[1] 冷金荣[1] 

机构地区：[1]同济大学建筑设计研究院,上海200092

出　　处：《结构工程师》2010年第2期70-75,共6页Structural Engineers

摘　　要：城市高架桥由于受到交通功能和景观造型的影响而经常采用异形宽箱梁结构,其受力特性较常规箱梁结构存在一些差异。相对于国内城市高架桥发展速度和建设规模,对这种特殊结构的分析研究成果显得较少。以某城市快速路高架桥梁异形宽箱梁为例,对这种结构的受力进行了分析。分别建立了平面杆系模型和三维实体有限元分析模型,首先分析了这种特殊截面的剪力滞效应(包括正效应和负效应),然后对比了恒载、预应力荷载、温度作用和活载作用下箱梁的正应力和剪应力分布,根据这些分析结果对设计计算和构造提出了一些优化建议,对类似工程也具有一定参考价值。Due to transportation functions and landscape form,wide irregular box-girders are often used in city viaduct.Structural behavior of an irregular box-girder is different from that of a regular box-girder.Comparing to the development speed and construction scale,the research results are very few.A plan finite element model and a three-dimensional solid finite element model for a wide irregular box-girder were established in this paper.A comparison of stress distribution of dead load,prestressing load,temperature load and live load,as well as shear-lag effect（including positive and negative effect）,between these two models was made.Based on the results,several optimization proposals were presented for the design,which are also useful for similar projects.

关 键 词：高架桥 异形宽箱梁 空间分析 剪力滞效应 有限元法 

分 类 号：U441[建筑科学—桥梁与隧道工程]