蜂窝梁一体化架桥机力学性能研究  

Research on the mechanical properties of castellated beam integrated bridge erecting machine

作　　者：王峥 张益伟 杨才千[2] 许福[3] WANG Zheng;ZHANG Yiwei;YANG Caiqian;XU Fu(CCCC Third Harbor Engineering Co.,Ltd.,Nanjing 210011,China;College of Civil Engineering,Southeast University,Nanjing 210096,China;College of Civil Engineering,Xiangtan University,Xiangtan 411105,China)

机构地区：[1]中交第三航务工程局有限公司南京分公司,江苏南京210011 [2]东南大学土木工程学院,江苏南京210096 [3]湘潭大学土木工程学院,湖南湘潭411105

出　　处：《湘潭大学学报（自然科学版）》2024年第5期92-100,共9页Journal of Xiangtan University(Natural Science Edition)

基　　金：国家自然科学基金面上项目(52078122)。

摘　　要：蜂窝梁一体化架桥机作为全预制装配式桥梁的重要施工机械,使用期间结构的静动力性能是影响一体化安装施工的重要因素.为揭示其静动力性能,分别采用了应变传感器,基于数字图像相关(DIC)技术的光电图像测量仪对关键截面的应变、挠度进行监测,并对结构的强度、刚度进行分析评估.采用简单移动平均法提取结构的动位移,并进行动力特性分析.此外,建立了结构主梁的有限元模型,并将其分析结果与监测结果进行对比.研究结果表明:有限元分析结果与实测结果一致,验证了有限元分析的准确性,两者均证明了其强度及刚度满足规范要求.基于动位移数据采用峰值拾取法能够有效识别架桥机的自振频率,有限元计算的一阶自振频率为4.08 Hz,相对于实测分析结果的最大误差仅为0.73%.As an important construction machinery for fully prefabricated bridges,the static and dynamic performance of the castellated beam integrated bridge erecting machine during use is an important factor affecting construction.In order to reveal its static and dynamic performance,the strain sensors and the photoelectric image measuring instrument based on DIC technology were used to monitor the strain and the deflection of the key sections.The strength and stiffness were analyzed and evaluated.The dynamic displacement of the structure was extracted by the simple moving average method,and the dynamic characteristic was analyzed.In addition,the finite element model of the structural girder was established.The finite element analysis results were compared with the monitoring results.The study indicated that the finite element analysis results were consistent with the measured results,which verified the accuracy of the finite element analysis.The strength and stiffness of castellated beam integrated bridge erecting machine were proved to meet the requirements of the code.Based on the dynamic displacement data,the peak picking method could effectively identify the natural frequency of the bridge erecting machine.The first-order natural frequency of the structure calculated by the finite element method is 4.08 Hz,and the maximum error is only 0.73%compared with the measured results.

关 键 词：全预制装配式桥梁 蜂窝梁一体化架桥机 静动力性能 强度评估 刚度评估 监测 有限元分析 

分 类 号：U445[建筑科学—桥梁与隧道工程]