某钢筋混凝土连续箱梁裂缝成因分析及计算研究  

ANALYZING OF CAUSES AND COMPUTING FOR CRACK OF A REINFORCED CONCRETE CONTINUOUS BOX GIRDER

作　　者：潘大荣[1] 赵启林[1] 王景全[1] 杨洪[1] 

机构地区：[1]解放军理工大学工程兵工程学院,南京210007

出　　处：《工业建筑》2008年第z1期250-253,164,共5页Industrial Construction

摘　　要：为了分析某普通钢筋混凝土箱梁在运营一年多后即出现严重开裂的原因,根据规范对箱梁截面设计与裂缝宽度进行了复核校验,结果满足规范设计要求,但实际最大裂缝宽度远大于规范限值。为此,利用数值模拟方法从车辆超载、荷载偏心、裂缝宽度分布等多个角度对裂缝的成因进行了分析。结果表明,超载与偏心是导致裂缝出现的主要原因,而箱梁裂缝最大宽度计算理论不完善是导致裂缝严重超标的重要原因。In order to analyze the causes for crack on a bridge which is made of reinforced concrete continuous box girder after a year of using,the box girder section design and crack width were checked according to the criterion,the results meet the request of the criterion,but the real crack width is more than limit of the criterion.Therefore the method of numerical simulation is used to analyze the causes for crack from the aspect of overloading,load eccentricity and crack width distribution.The conclusion is that the main cause for crack is overloading and load eccentricity,and the faultiness of computing theory of crack width is an important cause for crack exceeding the limit.

关 键 词：钢筋混凝土 连续箱梁 裂缝 成因 

分 类 号：U445.71[建筑科学—桥梁与隧道工程]