鋼筋混凝土結構物中鋼造雙K型斜撐框架有限元素模擬與分析

Finite Element Modeling and Analysis of a Double K-Braced Steel Frame in a Reinforced Concrete Structure

趙廣上(Guang-Shang Zhao)

指導教授 ： 周中哲

國立臺灣大學/工學院/土木工程學研究所/碩士(2019年)

https://doi.org/10.6342/NTU201902912

摘要

為研究雙K型斜撐鋼框架用於既有建築之補強效果，進行了實尺寸鋼框往復荷載試驗。本試驗根據試驗之構架實尺寸，運用ABAQUS軟體建立模型，進行有限元素分析。通過有限元素分析結果對比試驗結果，比較了鋼框架整體側力側位移，斜撐之軸力軸位移，自由體各力量分配等。結果表明，有限元素模型能夠較為合理的對雙K型斜撐鋼框架進行模擬。並且，通過模型可以得到鋼框架與RC結構接合處傳力機制。RC結構力量主要通過剪力鋼板傳遞至雙K型斜撐鋼框架，之後力量主要由斜撐承受。力量傳遞還與側力分佈有關，側力分佈在雙K型斜撐鋼框架區域內，則力量直接作用在雙K型斜撐鋼框架；側力分佈在雙K型斜撐鋼框架區域外，則力量以剪力型式傳遞至雙K型斜撐鋼框架。

關鍵字

建築補強 ； 有限元素分析 ； 傳力機制 ； 力量分配 ； 斜撐行為

並列摘要

An experiment was conducted to make a research on the performance of double K-braced steel frame under cyclic load to existing buildings. This study uses finite element program ABAQUS to model the specimen according to the test and does finite element analysis. Comparing finite element simulation results to test results, including lateral force and lateral displacement, axial force and axial displacement, free body force distribution etc. Analysis results show that ABAQUS model can accurately simulate double K-braced steel frame. And, ABAQUS model shows how force transfers from RC frame to double K-braced steel frame. Most force transfers from RC frame to double K-braced steel frame through steel shear plate, then braces bear most of the force. Lateral force distribution affects force transfer: force located in double K-braced steel frame area transfers directly to double K-braced steel frame; force located out of double K-braced steel frame area transfers to double K-braced steel frame mostly by shear force.

並列關鍵字

Building reinforcement ； FEM analysis ； Force transfer mechanism ； Force distribution ； Brace behavior

參考文獻

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