梁柱节点螺栓连接力学性能的精细数值分析  

Numerical analysis for mechanical behavior of high-strength bolted beam column joints

作　　者：薛筱蕾 徐芊[1] 方欣欣 陈月香 XUE Xiaolei;XU Qian;FANG Xinxin;CHEN Yuexiang(Jinshan College of Fujian Agriculture and Forestry University,Fuzhou 365000,China)

机构地区：[1]福建农林大学金山学院,福州365000

出　　处：《哈尔滨商业大学学报(自然科学版)》2025年第2期184-191,共8页Journal of Harbin University of Commerce:Natural Sciences Edition

基　　金：福建农林大学金山学院青年教师科研基金(kx230404)。

摘　　要：为了研究梁柱节点高强螺栓连接在剪力作用下的力学性能,采用ABAQUS基于螺栓的外螺纹轮廓几何表达,对前期试验中的试件建立精细化的螺栓有限元模型,考虑了材料非线性、断裂模型,分析螺栓连接的受力特性.研究结果显示,数值模拟计算所得试件变形、破坏模式、荷载-位移曲线以及极限承载能力均与试验得到的结果相吻合.在加载过程中,螺栓预紧力呈现下降的趋势,但在传力阶段由于板件的约束能够恢复部分预紧力;试件的应力集中主要出现在板件交界面附近的螺杆以及螺孔周围1倍螺栓直径内的板件;螺栓的破坏源于板件交界面附近的螺杆,其破坏形态为预紧力和剪力的共同作用下的斜截面剪切破坏.To study the mechanical behavior of the high-strength bolted beam column joints,the ABAQUS was adopted to establish a refinedfinite element model,of the high-strength bolted connections,which was reported by the authors of this paper before.Based on the thread profile equations of bolts and nuts,material nonlinear characteristics,damage models of bolt and steel were incorporated in the simulation to better understand the behavior of the bolted connector.The simulation results indicated that failure mode,load-displacement curve and peak load of numerically simulated high-strength bolted connection was basically consistent with the test results.The pretension force of the bolt decreased during the loading process,but in the load transmittal stage the pretension force had a gradually increasing trend as the increase of the load.The bolt shank at the skin and splice plates and the plates within one bolt diameter around the bolt hole produced a stress concentration phenomenon.The failure of bolt originated the bolt shank at the skin and splice plates,and the failure mode was the shear failure of inclined section of bolt shank with under the pretension force and the shear load.

关 键 词：高强螺栓 螺栓连接 螺栓预紧力 精细有限元模型 数值模拟 力学性能 

分 类 号：TU391[建筑科学—结构工程]