Dissertation > Excellent graduate degree dissertation topics show

Performance Analysis and Improvement of Flange Reinforced Dog-Bone Connection

Author: ZhangSiMin
Tutor: LiJun
School: Qingdao Technological University
Course: Structural Engineering
Keywords: Dog -bone flange enhanced node Nonlinear finite element analysis Hysteretic behavior Stress path
CLC: TU391
Type: Master's thesis
Year: 2010
Downloads: 50
Quote: 0
Read: Download Dissertation

Abstract

Northridge earthquake and the United States after the Kobe earthquake in Japan, many scholars through a lot of experiments and theoretical analysis of the mechanical behavior of beam-column joints, primarily through enhanced node or weaken the beam segment to improve the ability of the plastic deformation of the node. This article is based on the \said flange enhanced dog-bone node), the relocation of the beam plastic hinge side at the same time, both the beam-column joints strong carrying capacity, but also have good ductility. Firstly, in order to expand the node-wing pilot study based on ANSYS software for this expansion wing node nonlinear finite element analysis and finite element analysis results and the test results were compared, it can be seen from the hysteresis curve, limited element simulation is better able to truly reflect the plastic deformation of the node and carrying capacity. Based on the above test model, the beam-column joints to change the form, make the following three forms of Joints: flange type node enhanced dog bone, dog bone-in nodes as well as ordinary rigid nodes. Since expansion wing node finite element analysis results be verified in the same analytical methods of the three forms of nodes under cyclic loading finite element analysis, with some reliability and validity. The results showed that: a dog-bone flange reinforced plastic hinge nodes due to relocation, enhanced energy dissipation capacity and structural ductility; while the flange also allows nodes to enhance the carrying capacity and initial stiffness was significantly higher than the dog-bone node ; relative to the expansion wing node, end of the beam flange section despite strengthened, but strengthened to a lesser extent, need to increase the column section, so as to achieve the purpose of saving steel. In order to ascertain the beam flange, web and other key parts of the column joint stress field distribution and development law, established using ANSYS Ditto the four node model, in the end of the beam vertically downward force applied displacement under the action for monotonic loading three-dimensional nonlinear finite element analysis, the elastic stage, elastic-plastic stress distribution stage. The results showed that: a dog-bone flange enhanced obviously reached a plastic hinge node relocation purposes, not only do not need to increase the column cross-section, and the end of the beam weld quality is easier to be guaranteed. In order to make the beam flange plate joints expansion wing length, depth undermine and weaken the value length is more reasonable, we design three series flange type node enhanced dog bone specimens. Consider using material nonlinearity, geometric nonlinear finite element program were studied these parameters in the right flange enhanced dog-bone node force performance. Enhanced dog bone on flange type node design parameter ranges proposals for engineering design reference.

Related Dissertations

CLC: > Industrial Technology > Building Science > Building structure > Metal structures > Steel
© 2012 www.DissertationTopic.Net Mobile