长春工程学院学报（自然科学版）2025，Vol.26Issue(2)：15-21,7.DOI:10.3969/j.issn.1009-8984.2025.02.003
沁河特大桥钢混组合梁整孔架设施工力学特性分析
Mechanical Characteristics Analysis of the Whole Hole Erection of Steel Concrete Composite Beams for Qinhe Super Major Bridge
摘要
Abstract
Against the engineering characteristics of the large span and large tonnage bridge erecting ma-chine and the application of rebound force,a finite element model is established based on Midas Civil to an-alyze the stress state,deformation characteristics,and overall stability of the main beam of the bridge erec-ting machine which is JQJ600(1600)t-80m under different working conditions.The research results show that when the bridge erecting machine applies a secondary rebound force to the bridge deck,the stress gen-erated by the lower chord of the main beam is the highest,with a maximum value of 200.5 MPa,which is less than the allowable material stress of 239.8 MPa.The maximum deformation of the front auxiliary sup-port leg position of the bridge erecting machine under the maximum cantilever state during perforation is 595.877 mm,and the maximum deformation of the middle lifting point position under the application of secondary rebound force is 177.338 mm,both of which meet the allowable deflection requirements of the specifications.The overall stability,anti-overturning coefficient,and anti-slip coefficient under wind load under cantilever working conditions all meet the design requirements and can safely carry out construction operations.The measured values obtained from in-situ monitoring are in good agreement with the simula-ted values,once again proving that the bridge erecting machine meets the requirements for safe use,and proposing key installation technologies throughout the entire construction process.关键词
特大桥/钢混组合梁/架桥机/整孔架设/力学特性/现场监测Key words
super major bridge/steel-concrete composite beam/bridge erecting machine/whole hole erec-tion/mechanical properties/in-situ monitoring分类
交通工程引用本文复制引用
李浩,郭洁,张贤松,张勇华,李文杰..沁河特大桥钢混组合梁整孔架设施工力学特性分析[J].长春工程学院学报（自然科学版）,2025,26(2):15-21,7.基金项目
国家自然科学基金(U1604135)中交第二公路工程局有限公司重点科技研发项目(2022X-2-7)河南省科技厅产学研合作项目(2015HNCXY011) （U1604135）
