小曲线半径预制T梁架设受力分析及安全评定  

Stress Bearing Analysis and Safety Assessment of Prefabricated T-beams with Small Curve Radius During Erection

作　　者：吴钢伟 敖晨辉 叶利峰 Wu Gangwei;Ao Chenhui;Ye Lifeng(Zhejiang Jiantou Transportation Infrastructure Construction Group Co.,Ltd.,Hangzhou 310012,China)

机构地区：[1]浙江省建投交通基础建设集团有限公司,杭州市310012

出　　处：《北方交通》2025年第3期35-38,共4页Northern Communications

摘　　要：小半径曲线桥梁可以适应不同位置及环境,但架桥过程中的安全性问题也应予以关注。文章以葛绳弯大桥为依托,应用有限元软件分析架桥机的强度、刚度、稳定性和模态。结果表明,该方法可计算架桥机主桁架在运行过程中的强度、刚度和稳定性,保障施工安全性。为避免发生共振,可通过数值模拟对架桥机进行模态分析,避免主桁架频率与外荷载频率接近或一致,从而保障架桥机安全运行。Small radius curved bridges can adapt to different locations and environments,but the safety issues during the bridge erection process should also be taken into account.Based on the Geshengwan bridge,the strength,stiffness,stability,and mode of the bridge erecting machine are analyzed by using the finite element software.The results show that,this method can calculate the strength,stiffness,and stability of the main truss of the bridge erecting machine during operation,and ensure the construction safety.In order to avoid resonance,the modal analysis on the bridge erecting machine is performed by using the numerical simulation,so as to avoid the frequency of main truss from being close to or consistent with that of external load,and ensure the safe operation of the bridge erecting machine.

关 键 词：小曲线半径 受力分析 稳定性 模态分析 有限元分析 

分 类 号：U447[建筑科学—桥梁与隧道工程]