铸钢件连接螺栓受拉性能试验及计算方法研究

发布时间：2018-05-12 08:32

本文选题：钢框架 + 铸钢连接件　；参考：《建筑结构学报》2014年04期

【摘要】：对采用铸钢件连接钢框架梁柱节点中的螺栓受拉性能及相关计算方法进行研究。变换铸钢件水平肢、竖肢和肋板厚度对铸钢件螺栓连接进行受拉试验,研究铸钢件变形对螺栓内力的影响,获得螺栓内力与外荷载关系。试验结果表明:随铸钢件竖肢和肋板厚度的增加,螺栓内力减小,竖肢影响更显著。撬力的存在显著增大螺栓的内力,并且由于拉力的偏心,产生不可忽略的弯矩。采用ANSYS有限元分析软件进行扩大参数分析,对影响螺栓截面内力的因素进行研究,获得螺栓截面拉应力和弯曲应力变化规律,随着外荷载的增大,螺栓截面弯曲应力占总应力的比重不断增大。采用拟合方法提出适用于文中铸钢件形式的螺栓内力计算式。该式计算螺栓内力及应力与有限元分析结果吻合较好,应力相对误差小于10%,可用于此类连接受拉螺栓截面应力验算。
[Abstract]:The tensile properties of bolts in steel frame Liang Zhu joints connected with cast steel and their calculation methods are studied. The influence of deformation of steel castings on the internal force of bolts was studied by tensile test of the thickness of horizontal limbs, vertical legs and ribbed plates of steel castings, and the relationship between the internal forces of bolts and the external loads was obtained by studying the influence of the deformation of steel castings on the internal forces of bolts. The experimental results show that the internal force of bolts decreases with the increase of the thickness of the vertical and ribbed plates of steel castings, and the effect of the vertical legs is more obvious than that of the steel castings. The existence of prying force significantly increases the internal force of the bolt, and due to the eccentricity of the tensile force, the bending moment can not be ignored. The expanded parameter analysis was carried out by ANSYS finite element analysis software, and the factors influencing the internal force of bolt section were studied, and the variation law of tensile stress and bending stress of bolt section was obtained, and with the increase of external load, the variation of tensile stress and bending stress of bolt cross-section was obtained. The proportion of bending stress of bolt section to total stress is increasing. A formula for calculating the internal force of bolts in the form of steel castings is presented by fitting method. The calculated internal force and stress of bolt are in good agreement with the results of finite element analysis, and the relative error of stress is less than 100.It can be used to check the cross section stress of this kind of connecting tension bolt.
【作者单位】：吉林大学建设工程学院;哈尔滨工业大学土木工程学院;
【基金】：国家自然科学基金项目(51008094,E080507) 吉林大学基本科研业务费项目(201103141)
【分类号】：TU391

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