CAJ | 학술논문

以宁波南站钢结构站房为背景，从钢材的力学性能角度分析采用分段吊装法和整体吊装法进行大跨度超重悬挑钢结构吊装时结构的根部和支撑杆受力情况，采用大型有限元软件对2种施工方法进行模拟，将把2种施工方法得出的真实数据与有限元软件计算出的预测数值进行分析比较。研究结果表明：在进行大跨度超重结构吊装时，在卸载完成时整体吊装法比分段吊装法在根部最大应力大出较多，且比有限元软件的模拟值略大。整体吊装法施工过程中撑杆最大应力比分段吊装法的撑杆最大应力小。在采用整体吊装时有必要对悬挑结构的根部进行加固，采用分段吊装时有必要对支撑杆件进行加固。
이저파남참강결구참방위배경，종강재적역학성능각도분석채용분단조장법화정체조장법진행대과도초중현도강결구조장시결구적근부화지탱간수력정황，채용대형유한원연건대2충시공방법진행모의，장파2충시공방법득출적진실수거여유한원연건계산출적예측수치진행분석비교。연구결과표명：재진행대과도초중결구조장시，재사재완성시정체조장법비분단조장법재근부최대응력대출교다，차비유한원연건적모의치략대。정체조장법시공과정중탱간최대응력비분단조장법적탱간최대응력소。재채용정체조장시유필요대현도결구적근부진행가고，채용분단조장시유필요대지탱간건진행가고。
On the background of the cantilever steel beam of Ningbo south railway station,the mechanical prop-erties of cantilever beam root stress and supporting bar stress were analyzed when lifting the large span and canti-lever steel structures by the construction methods of segmental hoisting or integral hoisting.Then the two con-struction methods were simulated by large-scale finite element software,and the simulation results were com-pared with the real data.The research results show that when lifting the large span and cantilever steel beams, the maximum root stress calculated by the method of integral lifting is lager than that by the method of segmental hoisting after unloading,and the finite element simulation results is slightly smaller.However,the maximum stress of supporting bar is smaller when calculating by the method of segmental hoisting.It is necessary to rein-force the root of cantilever structure when using the method of integral lifting and it is essential to reinforce the bar stay of cantilever structure when adopting the approach of segmental hoisting.