- 學位論文
以有限元素法模擬RC剪力牆於改變不同參數對強度與裂縫分布之影響
Numerical Simulation of the Strength and Cracking Distribution of RC Shear Wall
摘要
剪力牆於鋼筋混凝土結構系統中，可提供足夠的側向勁度，亦充分被應用於 當今結構補強工程中。因影響RC 剪力牆受力行為主要因素有；鋼筋比、高寬比與 牆體厚度等，但由於前人文獻中並無大量的針對剪力牆改變不同配置，對剪力牆 受力後之行為所造成影響進行探討。故本研究以ANSYS 有限元素軟體，針對前人 文獻之RC 剪力牆試體進行非線性側推分析，其中試體包含高、中、矮型RC 剪力 牆三座，與矮型開口剪力牆、開門雙邊翼牆各一座，分析結果與實驗結果比較後， 將高型剪力牆改變其鋼筋比、高寬比、牆體厚度，開口剪力牆則改變牆體厚度進 行分析。經分析結果與前人文獻結果比較後，發現其分析之側力值雖比實驗高， 但其降伏位移與牆體整體之力-位移曲線趨勢皆與實驗結果相似，牆體裂縫分布範 圍亦與實驗相似。高型RC 剪力牆於增加鋼筋比可提高牆體強度，裂縫分布範圍亦 擴大，增加牆體厚度強度亦提升，但提升效果並不明顯，牆體增厚之裂縫分布範 圍則相對減少，增加牆體高寬比，則造成牆體強度降低，但產生降伏強度之位移 延後發生，裂縫分布則有往牆底集中之趨勢。矮型開口剪力牆與開門雙邊翼牆增 加牆體厚度強度提升些許，對裂縫分布範圍則無太大影響。
並列摘要
Reinforced Concrete (RC) shear wall in structure system can provide lateral stiffness and be applied to the structural reinforcement project. The main factors to affect the mechanical behavior of the RC shear wall include the steel ratio, the ratio of height to width, and the wall thickness. Therefore, the study is to evaluate the past literature and the nonlinear pushover analysis of RC shear wall by the Finite Element Method of ANSYS software. The specimens include three types of RC shear wall (in high, medium and low mode), framed shear walls with opening, low- rise and door. By changing the steel ratio, the ratio of height to width and the wall thickness, the nonlinear pushover analysis is conducted for evaluation. After reviewing the analysis and comparing the results with the past literature, the trends of the force-displacement curve and the crack distribution in the wall are similar to the experimental results. The increase of the steel ratio of RC shear wall leads to the increase of the wall strength as well as the cracks distribution scope. The increase of the thickness of RC shear wall leads to the slight increase of the wall strength, but the decrease of the cracks distribution scope. The increase of the ratio of height to width of RC shear wall causes the decrease of the wall strength. However, to increase the thickness of RC shear wall with opening, low- rise and door, will lead to the increase of the wall strength, but no effect on the cracks distribution.