作　　者： ; ; ; ; ;

机构地区： 北京工业大学建筑工程学院工程抗震与结构诊治北京市重点实验室

出　　处： 《振动与冲击》 2011年第7期256-260,共5页

摘　　要： 考虑目前钢管混凝土系杆拱桥吊杆的新型施工工艺及其复杂的锚固约束情况,以吊杆的索力值、抗弯刚度和计算长度作为未知参数,分析吊杆频率对各参数的敏感程度,基于参数灵敏度的迭代算法可同时计算出吊杆索力值,抗弯刚度和计算长度。运用该方法对4根不同参数的吊杆数值分析,结果表明该方法不仅有很高的精度,而且还适用于频率值受抗弯刚度影响较大的短吊杆。同时对一座钢管混凝土拱桥的吊杆进行测试分析,证明了该方法实用可行。 Taking advantages of the new construction and complex anchorage techniques,a method was proposed,with takes the tension force,flexural rigidity and length of hanger rod as unknown parameters to analyze the sensitivity of parameters with respect to natural frequencies.The algorithm based on sensitivity-updating is able to simultaneously identify the tension force,flexural rigidity and length of hanger rod.Then,the method was applied to four different hanger rods systems,and it is proved that the proposed method is of high accuracy,and can be applicable to the rods with high bending stiffness.A testing on a CFST tied arch bridge proves the field applicability of the method presented.

关 键 词： 吊杆 索力 频率 抗弯刚度 参数灵敏度

领　　域： [建筑科学] [交通运输工程]