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標題: | RC構架內含填入式開口磚牆之耐震補強研究 A Study on Seismic Retrofitting for Brick Infill in RC Frames with Openings |
作者: | Jyun-Siang Jhang 張竣翔 |
指導教授: | 黃世建(Shyh-Jiann Hwang) |
關鍵字: | 填入式,開口磚牆,耐震補強,碳纖維補強,鋼構件補強, Infill,Brick wall with openings,Seismic retrofitting,carbon fiber retrofitting,Steel retrofitting, |
出版年 : | 2019 |
學位: | 碩士 |
摘要: | 台灣位於環太平洋地震帶上,地處歐亞大陸板塊與菲律賓海板塊的交界,是地震活躍地區。台灣每年約發生18500次地震,其中也包含多次災害性地震。在勘災過程中發現許多老舊房屋內部之隔間牆多為磚造,且為符合使用情形多有窗型或門型開口。文獻也指出開口磚牆仍有其耐震能力,在地震過後開口磚牆會有破壞現象,其抗震能力會受到影響。為了確保開口填充磚牆之耐震能力,維持老舊建築之可用性以及安全性,有效且經濟的補強方法就變得重要,本研究旨在探討不同補強方式對於開口磚牆之補強效果。
本研究預計規劃五座試體,依照開口型式分為純開窗以及開門加開窗,兩種開口型式各有碳纖維補強及鋼構件補強兩種方式。根據試驗結果顯示,碳纖維補強方法能夠有效的使開口磚牆之邊界束制提升,進而使填入式磚牆之強度提高。而鋼構件補強方法,對於開口未連續處之弱面仍有可能會有滑移破壞,若產生滑移破壞則無法達到預計之補強效果。 本研究之分析模型採用撓剪破壞柱加上三面或四面圍束磚牆,於同位移下作強度疊加。對於試體之強度預測為保守且準確,但對於強度點之位移補強前有低估而補強後有高估之現象。 Taiwan is located in the Pacific Rim seismic zone, at the junction of the Eurasia plate and the Philippine Sea plate, and is an active area of the earthquake. There are about 18,500 earthquakes in Taiwan each year, including many disastrous earthquakes. During the survey, many of the partition walls inside the old houses were built of bricks, and there were many windows or door openings to satisfy the usage. The literature also pointed out that brick walls with openings still has its ability to resist earthquakes. After the earthquake, the brick walls will be damaged, and its seismic capacity will be reduced. To ensure the seismic capacity of the brick walls and maintain the usability and safety of the old buildings, an effective and economical retrofitting method becomes important. This study aims to explore the retrofitting effect of different approaches on the brick infill with openings. This study tested five specimens, which are divided into two opening types. The two opening types have carbon fiber retrofitting and steel member retrofitting. According to the test results, the carbon fiber retrofitting can effectively hold the boundary of the brick infill, thereby improving the strength of the brick wall. However, the steel member reinforcement method may still have slippage damage to the weak surface where the opening is not continuous, and if the slippage is broken, the expected retrofitting effect cannot be achieved. The analytical model of this study uses a shear-bending failure column plus three or four-sided confinement of brick walls, which are superimposed on the same displacement. The strength prediction of the specimen is conservative and reasonable, but there is an underestimation before the displacement of the strength point and an overestimation after the retrofitting. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/74564 |
DOI: | 10.6342/NTU201902620 |
全文授權: | 有償授權 |
顯示於系所單位: | 土木工程學系 |
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