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The Research on Static Behavior of Top and Seat Angle Semi-rigid Connections

Author: XiangFang
Tutor: ShuXingPing
School: Hunan University
Course: Structural Engineering
Keywords: TOP AND ANGLE CONNECTION Ultimate flexural capacity of Initial rotational stiffness Finite Element Analysis
CLC: TU392.1
Type: Master's thesis
Year: 2005
Downloads: 154
Quote: 8
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Abstract


In the analysis and design of the traditional steel frame, in order to simplify the analysis and design process, the beam-column connections are considered ideal hinged connection or completely rigid connection. In fact, most of the beam-column connection used in the connection of the steel frame, its performance is always somewhere in between, that is, semi-rigid connections. In order to correctly predict the actual stress performance of the steel framework, should be considered in the analysis and design of steel frame nonlinear effects of real connection. TOP AND ANGLE CONNECTION is selected as the object of study, analysis of its performance under static loads. Consider the impact of node performance factors based on the ultimate flexural capacity of semi-rigid connections of the upper and lower flange angle iron theoretical analysis, obtained by calculating the upper and lower flanges ANGLE CONNECTION weakest node force link the weakest connecting member destruction will result in loss of flexural capacity node. Derived by calculating the ultimate bearing capacity of the weakest link TOP AND ANGLE CONNECTION ultimate flexural capacity of nodes. In the calculation of the initial stiffness of the connection, the same comprehensive consideration of various factors affect node performance, the Angle by pull equivalent to a cantilever model and to consider the pre-tension is applied to the high-strength bolts, the column flange deformation equivalent cross role of a centralized force at both ends of the fixed beam model for the calculation. The calculation results with the experimental results are in good agreement. Meanwhile, through a part of the change node geometry parameters, the use of large-scale general-purpose finite element software ANSYS nonlinear finite element analysis of node connection moment rotation curve is calculated, and then analyzes the nodes of various geometric parameters on the node The ultimate flexural carrying capacity as well as the initial rotational stiffness. The results show that: angle steel thickness, tension between the part of the axis of the bolt to the beam flange distance, high-strength bolt diameter, and the beam cross-section height greater impact force performance nodes, while the thickness of the column flange, column web thickness and column abdominal board stiffener set of nodes force has little effect on performance, including high-strength bolts pre-tension applied nodes can improve the initial rotational stiffness. The results of this paper the mechanical properties of semi-rigid connection and connection design provides recommendations for further study of the upper and lower flange angle iron.

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CLC: > Industrial Technology > Building Science > Building structure > Metal structures > Various types of steel > Steel structure
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