Title

鋼絲網加勁高韌性纖維混凝土於RC梁構件剪力補強研究

Authors

陳育瑄

Key Words

補強 ; ferrocement

PublicationName

中央大學土木工程學系學位論文

Volume or Term/Year and Month of Publication

2015年

Academic Degree Category

碩士

Advisor

李顯智

Content Language

繁體中文

Chinese Abstract

本研究之目的為評估使用鋼絲網混凝土(Ferrocement)結合PVA(Polyvinyl alcohol)纖維於補強梁構件之效益,透過垂直反覆加載試驗,觀察比較梁構件補強前後之耐震行為表現, 研究中共規劃設計了六支懸臂梁試體,以及五種不同補強護套,以探討使用不同尺寸之線網與有無添加纖維對補強之影響。 由試驗所得之數據結果,透過遲滯迴圈圖、裂縫發展狀況、臨界斷面之轉角、能量消散比、鋼筋降伏情形、以及混凝土矩形應變塊,探討比較各試體之耐震行為與各補強方法之補強效益。實驗結果顯示,試體經過補強後其整體耐震行為表現皆能有所提升,其中以使用一層鋼筋網搭配工程水泥基複合材料(Engineered Cementitious Composites)之補強方式(B-F-1S-ECC),為最具補強效益之方法,其使試體之極限載重與位移分別提升28%與167%,且於加載位移4%時,擁有27.5%的能量消散比,能有效提升結構整體之耐震消能能力。

English Abstract

The main objective of the study is to investigate the effectives of ECC jacketing for retrofitting shear-deficient RC members. Six cantilever beams are retrofitted with five different types of jackets that have various types of steel meshes and matrix. The beams are tested under cyclic loading. The test results show that the beams which have been retrofitted with ferrocement jacket can improve their seismic capability. The beam which retrofitted with one layer steel bar mesh and ECC jacket is the most effective method. Its ultimate strength and drift capacities are increased by 28% and 167%, respectively. At the drift ratio 4%, the beam has the highest energy dissipation ratio which is equal to 27.5%. Therefore, the proposed retrofitting method can effectively improve the seismic energy dissipation capacity for structural members.

Topic Category 工學院 > 土木工程學系
工程學 > 土木與建築工程
Reference
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