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Comprehensive Analysis and Evaluation on the Seismic Strengthening Effect of Multilayer Frame Structure

Author: FengLiNa
Tutor: YaoJiTao
School: Xi'an University of Architecture and Technology
Course: Structural Engineering
Keywords: Multilayer frame structure Seismic strengthening Capacity calibration Plane regularity Vertical regularity
CLC: TU352.11
Type: Master's thesis
Year: 2011
Downloads: 124
Quote: 1
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Abstract


Seismic strengthening is an important technical measure to improve the existing structural seismic performance. Previous earthquake damage survey results show that seismic strengthening can improve existing structure seismic performances. Seismic strengthening can change the performance of existing structures. That purpose is to improve the seismic performance of existing structures. But it may also bring negative influence to other performance of existing structures. At present our country reinforcement design methods and standards did not give more attention to that question. In actual earthquake disaster, there are also many damage examples of existing structures which were caused by improper seismic strengthening serious. The paper mainly aimed at the question that seismic strengthening brings negative influence to existing structures. Research increase section method strengthening multilayer frame column may bring negative influence to existing structures. It can provide more evidences to evaluation seismic strengthening influence to multilayer frame structure.The major research content and the results of this paper are as follows:1.This paper systematically describes all kinds of seismic strengthening method and basic principle to reinforced concrete structures. Pointing out current seismic strengthening schemes evaluation has insufficiency. Aiming at the shortcoming, Point that seismic strengthening must comprehensive considerate the bearing capacity and the influence to original structure.2.Choosing the typical multilayer frame structure, using SATWE analysis the number of reinforces frames and the reinforcement thickness influence to structure plane performance when reinforced frame columns. Point that using increase section method reinforce frame column, when the number of strengthening frame column is total number of frames column 1/3 times, The maximum displacement of structure is the largest.3.Choosing the typical multilayer frame structure, using SATWE analysis the number of reinforcing floor and the reinforcement thickness influence to structure vertical performance. Point that using increase section method reinforce frame column, Structure frail-layer will appear metastasis with the number of reinforcing floor increasing.Paper reveals that strengthening may cause negative influence to structure plane performance and vertical performance. This can provide the basis to schemes evaluation of frame structure seismic strengthening.

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CLC: > Industrial Technology > Building Science > Building structure > Special Structure > Anti - shock structure,disaster prevention structures > Shock, isolation, and explosion-proof structure > Seismic structure
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