新型模块化钢结构柱内置螺栓节点力学性能影响因素研究  

Study on the influencing factors of mechanical performance of an innovative modular steel connection with installed bolts in the columns

作　　者：夏军武[1,2] 张帅 王永瑞 王晓明 XIA Junwu;ZHANG Shuai;WANG Yongrui;WANG Xiaoming(State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Jiangsu Collaborative Innovation Center of Building Energy-saving and Construction Technology,Jiangsu Vocational Institute of Architectural Technology,Xuzhou,Jiangsu 221116,China;School of Naval Architecture,Ocean&Civil Engineering,Shanghai Jiao Tong University,Shanghai,200030,China)

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116 [2]江苏建筑职业技术学院江苏建筑节能与建造技术协同创新中心,江苏徐州221116 [3]上海交通大学船舶海洋与建筑工程学院,上海200030

出　　处：《中国矿业大学学报》2023年第5期918-930,共13页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(52074270);江苏建筑节能与建造技术协同创新中心重点项目(SJXTZD2106)。

摘　　要：为了克服传统模块化节点无法将8个模块连成整体、焊接量大、缺乏施工空间等问题,提出了一种新型柱内置螺栓节点(IBC).通过ABAQUS有限元模拟的方法,研究了地板梁、天花板梁抗弯刚度比、斜向加劲肋尺寸、垫板厚度、柱轴力、螺栓预紧力、垫板长度和钢材材性对该节点抗弯性能的影响.结果表明:地板梁、天花板梁刚度比的增大会显著提高节点刚度和抗弯承载力,当梁刚度比从1增大到1.543,1.987,2.500和3.410时,节点初始刚度分别增大了19.11%,33.05%,47.80%和71.52%,屈服弯矩分别增大了17.72%,30.05%,42.26%和59.84%;钢材材性的提高会明显增大节点抗弯承载力但节点刚度不变;斜向加劲肋尺寸、垫板厚度、垫板长度、柱轴力和螺栓预紧力对节点刚度和抗弯承载力影响很小,但斜向加劲肋长度和内角空余面积的增大有利于塑性铰外移.此外基于试验与数值模拟数据得出了不同刚度比下节点的弯矩-转角曲线理论公式,并验证了公式的可行性,可为实际工程设计提供参考.In order to solve the problems of traditional modular connections, such as the inability to connect eight modules as a whole, the large workloads of welding and the lack of construction space, an innovative modular connection with installed bolts in the columns(IBC) was developed. Based on ABAQUS finite element simulation, the influence of floor beam/ceiling beam stiffness ratio, diagonal stiffener size, plate thickness, column axial force, bolt preload force, plate length and steel property on the flexural performance of the connection was investigated. The results show that the stiffness and flexural capacity of the connection are significantly improved with the increase of floor beam/ceiling beam stiffness ratio. When the ratio increases from 1 to 1.543, 1.987, 2.500 and 3.410, the initial stiffness of the connection increases by 19.11%, 33.05%, 47.80% and 71.52% respectively, and the yield moment increases by 14.88%, 25.28%, 35.46% and 49.60% respectively. The improvement of the steel property increases the flexural capacity of the connection obviously, but the stiffness remains unchanged. The diagonal stiffener size, the plate thickness, the plate length, the column axial force and bolt preload force have little influence on the stiffness and flexural capacity of the connection, but the increase of diagonal stiffener length and free area of the inner angle are conducive to the outward shift of plastic hinge. In addition, based on the experimental and numerical simulation data, the theoretical formula of the moment-rotation curves of the connection with different stiffness ratios is presented, and the feasibility of the theoretical formula is verified, which can provide guidance for practical engineering design.

关 键 词：模块化节点 参数分析 有限元模拟 弯矩-转角曲线理论公式 

分 类 号：TU391[建筑科学—结构工程]