【作者】 武永丽； 刘鹏云； 李芳军； 王秀丽； 张琪；

【Author】 Wu Yongli;Liu Pengyun;Li Fangjun;Wang Xiuli;Zhang Ji;China Railway 21 Group No.2 Engineering Co., LTD;School of civil Engineering, Lanzhou University of Technology;

【机构】 中铁二十一集团第二工程有限公司； 兰州理工大学土木工程学院；

【摘要】 现代结构由于大空间的需求越来越多,内置型钢混凝土组合结构被广泛采用,但是随着结构跨度的增加,型钢与混凝土协同工作性能及承载力要求更高。本文以甘肃简牍博物馆项目为背景,采用大型通用有限元软件ABAQUS对实际工程中跨度最大的25.2 m大跨度内置型钢混凝土梁进行了有限元分析,得到该梁在集中加载方式下的荷载-位移曲线,并通过云图进行了应力以及损伤分析,给出了出现塑性变形的位置,探讨了不同混凝土强度等级、纵筋直径、腹板厚度及含钢率等参数对型钢混凝土梁承载力的影响。研究工作可供大跨度型钢混凝土梁设计参考,也为现场施工提供了技术支持。更多还原

【Abstract】 Due to the increasing demand of large space in modern structure, the built-in steel concrete composite structure is widely used, but with the increase of structural span, the cooperative performance and bearing capacity of steel and concrete are required to be higher. In this paper, based on Bamboo slips Museum project of Gansu, a large general finite element software ABAQUS is used to carry out finite element analysis on 25.2m long-span internal steel concrete beams with the largest span in actual engineering. The load-displacement curves of the beam under concentrated loading are obtained. The stress and damage were analyzed by cloud image and the location of plastic deformation was given. The influence of different concrete strength grades, longitudinal reinforcement diameter, web thickness and steel content on the bearing capacity of steel reinforced concrete beams is discussed. The research work can be used as a reference for the design of large-span steel concrete beams, and also provide technical support for the construction in site.更多还原