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Elastic-Plastic Analysis and Dynamic Performance Analysis of Special-Shaped Steel Reinforced Concrete Column Frame

Author: QinHao
Tutor: LiZhe
School: Xi'an University of Technology
Course: Structural Engineering
Keywords: Steel reinforced concrete special-shaped column frame Hysteresis curve Ductility Characteristics of seismic response Time history analysis
CLC: TU398.9
Type: Master's thesis
Year: 2009
Downloads: 38
Quote: 0
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Abstract


Shaped column frame to save space, and optimize the layout of the room, and to reduce the structural weight. However, due to the framework of reinforced concrete columns sectional irregular shaped columns so poor seismic performance of reinforced concrete shaped column frame. Shaped column frame height of the housing in areas of high intensity is severely restricted, severely restricted the use of the framework of the reinforced concrete columns. In order to be able to play a specially shaped columns advantages, but also to the promotion of the use, the need to improve the seismic performance of reinforced concrete columns. This paper studies the shaped steel framework of reinforced concrete columns in seismic performance. The main contents and conclusions of this study are as follows: 1. Using the finite element software ANSYS to simulate the same size as the actual project bay steel reinforced concrete special-shaped column frame. Pushover method, the hysteretic behavior of the framework to map out a framework for the skeleton curve, the study of axial compression ratio and sections on the seismic behavior. Steel reinforced concrete shaped column frame to meet the strong column weak beam \3.47, has a good ductility. As can be seen by comparing the analysis section steel join can significantly improve the seismic capacity and carrying capacity of the reinforced concrete shaped column frame. 2. Using the finite element software ANSYS to establish three comparative model. Computational analysis framework of reinforced concrete columns and steel reinforced concrete special-shaped column frame; same section steel steel ratio rectangular steel reinforced concrete column frame and steel reinforced concrete special-shaped column frame; rectangular columns frame has shaped spindle moment of inertia of reinforced concrete, reinforced concrete shaped column frame and steel reinforced concrete special-shaped column frame. Use of modal superposition response spectrum method to study the seismic response characteristics of the comparison model under horizontal seismic action. Drawn steel reinforced concrete special-shaped frame column torque and framework layer displacement are small, shaped reinforced concrete columns frame added to improve the seismic performance of steel reinforced, and its application in the high-intensity area offers the possibility; has centroidal axis moment of inertia reinforced concrete rectangular column frame, shaped reinforced concrete columns frame and steel reinforced concrete special-shaped column frame three structural framework of the column torque and layer displacement is very close, with similar characteristics of seismic response. 3 using the finite element software ANSYS to establish a steel reinforced concrete special-shaped column frame model. The use of the modal response spectrum method to study the column section steel steel ratio changes, changes in the column section column limb length changes of seismic response characteristics. Drawn shaped steel with little effect of the seismic response of the ratio of the steel framework: column section by the corner posts and side column to the cruciform column on seismic favorable; column limb length change will significantly affect the column internal forces and displacements. The use of dynamic time history analysis method, comparative study of the column section steel steel ratio changes, the seismic response characteristics of the column section changes column limb length changes.

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