带悬臂梁段栓焊连接节点的本构关系研究

发布时间：2018-07-05 13:29

本文选题：带悬臂梁段 + 栓焊拼接　；参考：《华南理工大学》2013年硕士论文

【摘要】：本文作为广东省标准《钢结构设计技术规程》的一项，致力于推行节点半刚性在工程中的认识与应用。课题组以往作出大量工作，使用基于相关性的半刚性节点分析方法探讨研究了一系列常用钢节点的本构关系模型。本文依托于试验，探究了带悬臂梁段栓焊拼接节点的力学性能，继而对其本构关系进行研究。首先，对四个带悬臂梁段栓焊拼接试件进行了静力加载试验研究，对节点承载能力、变形能力进行了测量，对试件的破坏模式、转动变形有了进一步的认识。通过试验数据的分析，建立节点弹性阶段的M-θ模型曲线，得出相对应试件的初始转动刚度、屈服承载力、极限承载力等关键特性参数。其次，使用有限元软件ANSYS对两种尺寸的试件进行三维非线性有限元分析，，通过与静力试验结果互相印证，说明了ANSYS可以很好的模拟带悬臂梁段拼接节点的受力性能。最后在正确有限元模型基础上，利用概率统计的方法，使用ANSYS中的PDS模块，经过对既定节点与普通焊接梁柱节点灵敏度分析的对比，提出简化模型的思路，大量分析后得出了适用于边柱、中柱节点的弹性阶段本构关系模型。该模型在边柱与中柱两种情况下仅是弹性常量E的数值差别，且适用于较大的尺寸区段，实际中具有更强的适用范围。继而使用试验与有限元分析得出的相应模型的初始刚度与公式结果进行了比对，验证了公式的合理性。
[Abstract]:In this paper, as one of the technical specifications for steel structure design in Guangdong Province, the recognition and application of semi-rigid joints in engineering are put forward. The research group has done a lot of work in the past and studied a series of constitutive relation models of steel joints by using the semi-rigid joint analysis method based on correlation. In this paper, the mechanical properties of bolted joints with cantilever beam are investigated based on experiments, and the constitutive relations of joints are studied. First of all, the static loading test of four jointed specimens with cantilever beam segment is carried out, the bearing capacity and deformation capacity of the joints are measured, and the failure mode and rotational deformation of the specimens are further understood. Based on the analysis of the test data, the M- 胃 model curve of the elastic stage of the joints is established, and the key characteristic parameters such as initial rotational stiffness, yield bearing capacity and ultimate bearing capacity of the specimens are obtained. Secondly, the finite element software ANSYS is used to analyze the three-dimensional nonlinear finite element of two kinds of specimens. The results of static test show that ANSYS can well simulate the mechanical behavior of joints with cantilever beam. Finally, on the basis of the correct finite element model, using the method of probability and statistics, using the Liang Zhu module in ANSYS, after comparing the sensitivity analysis between the established joints and the common welded Liang Zhu joints, the idea of simplifying the model is put forward. After a lot of analysis, the constitutive relation model of elastic stage is obtained, which is suitable for the joint of side column and middle column. The model is only the numerical difference of the elastic constant E in the case of the side column and the middle column, and is suitable for the larger size section, and has a stronger applicable range in practice. Then the initial stiffness of the corresponding model is compared with the results of the formula by using the experiment and the finite element analysis, which verifies the rationality of the formula.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU391

【参考文献】