大跨度预应力混凝土连续刚构桥合理边中跨比研究  

Research on Reasonable Choice of Side to Middle Span Ratio of Long-span Prestressed Concrete Continuous Rigid-frame Bridge

作　　者：靳志刚[1] 左德中 

机构地区：[1]河北省交通勘察设计研究院,石家庄050011 [2]湖北通顺高速公路有限公司,黄冈438000

出　　处：《交通科技》2010年第3期31-34,共4页Transportation Science & Technology

摘　　要：针对大跨度预应力混凝土连续刚构桥边中跨成比例的特点,总结并分析了国内外部分大跨度混凝土梁桥取值经验及其规律,结合工程实例建立了6个具有不同边中跨比的数值模型,分析了跨度比值与主梁受力特性间的关系,并对不同荷载作用下主梁关键截面的应力及位移变化进行了研究。Based on the fact that long-span prestressed concrete continuous rigid-frame bridge has different length between side span and middle span,the paper summed up and analyzed the experience and laws of long-span prestressed concrete bridge at home and abroad,based on which,combining a practical case,six numerical models having different side to middle span ratio were built for analyzing the relationship between span ratio and the performance of main girder. Besides,the stress and displacement of the key sections under the different load was researcied.

关 键 词：连续刚构桥 边中跨比 参数设计 

分 类 号：U448.35[建筑科学—桥梁与隧道工程]