高性能纖維混凝土於梁柱接頭之耐震與補強效能評估;Evaluation of Using High Performance Fiber Reinforced Concrete in Beam-Column Joints for Seismic Resistance and Retrofit

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題名:	高性能纖維混凝土於梁柱接頭之耐震與補強效能評估;Evaluation of Using High Performance Fiber Reinforced Concrete in Beam-Column Joints for Seismic Resistance and Retrofit
作者:	洪崇展;李釗;王勇智
貢獻者:	土木工程學系
關鍵詞:	高性能纖維混凝土;梁柱接頭;擴柱補強;數值模擬;地震工程;結構分析;研究領域：土木水利工程類
日期:	2011-08-01
上傳時間:	2012-01-17 17:22:25 (UTC+8)
出版者:	行政院國家科學委員會
摘要:	高性能纖維混凝土(HPFRC)與傳統混凝土和纖維混凝土不同之處在於，其特殊張力應變硬化行為能帶來高韌性，與良好的裂縫寬度控制能力，可減少結構物的側向鋼筋使用量，簡化施工設計與技術，並能有效地提高結構物的耐久性及使用年限，減少日後維護與修繕相關成本。本計畫目標為，研究HPFRC於梁柱接頭抗震消能與擴柱補強的有效性。本計畫將先進行自充填高性能纖維混凝土(Self-Consolidating HPFRC, SCHPFRC)的本土化配比設計，其材料組成將採取高比例的綠色摻料，因此為一種永續性的綠色材料，並將進行數種材料性質實驗，如拉壓力，與握裹力實驗。之後，將設計與製作數支SCHPFRC梁柱接頭，進行反覆載重實驗，研究其抗震消能的有效性，此外，亦將針對國內民間老舊建物與校舍常見的低強度低韌性接頭，使用SCHPFRC進行擴柱補強，探討其補強的效能。於數值分析部分，將根據實驗結果，建立鋼筋與SCHPFRC間握裹力與滑移之關係式，並發展SCHPFRC材料數值模型，模擬各式SCHPFRC結構桿件的地震行為。本計畫中的SCHPFRC，不僅具有高性能力學性質，良好工作性，亦為一種永續性的綠色建材，研究成果將有助於使用高性能環保材料於抗震分析、耐震設計、新式結構耐震行為、與老舊建物補強之發展，並推動大眾建設永續經營之觀念。High Performance Fiber Reinforced Concrete (HPFRC) is distinguished from the traditional reinforced concrete (RC) and fiber reinforced concrete (FRC) by its unique strain-hardening behavior in tension, which translates into enhanced ductility and crack-width controlling ability, enabling reduction of steel confinement and simplifying construction techniques. It has been reported that using HPFRC is able to increase the durability and service life of infrastructures, thus reducing the cost of maintenance and retrofits in the long term. The goal of this project is to investigate the effectiveness of applying self-consolidating HPFRC (SCHPFRC) to beam-column joints for seismic resistance and retrofits. The project will first conduct the mix proportioning design of SCHPFRC, which consists of a large proportion of green materials, such as fly ash and silica fume. A series of experimental tests will then be conducted to investigate material properties, including direct tensile test, compression test, and steel rebar pullout test. After that, a number of beam-column joints with simplified reinforcement details and reduced reinforcement amounts will be designed and constructed. The specimens will be tested to investigate their seismic behavior using cyclic-loading test. In addition, the developed SCHPFRC will be used to retrofit the beam-column joints, representing the deficient structural components that were designed and built in the early 70s and characterized by low ductility and strength. The effectiveness of using SCHPFRC for structural retrofitting will then be investigated. In addition to the experimental investigation, the project will develop the constitutive law for the SCHPFRC and construct its numerical material model to simulate the seismic behavior of various types of SCHPFRC structural elements. The research results presented herein will be beneficial for the development of using high performance green materials for new seismic-resistant structures and old structure retrofitting. It is also contributive to the development of durable and sustainable infrastructures. 研究期間：10008 ~ 10107
關聯:	財團法人國家實驗研究院科技政策研究與資訊中心
顯示於類別:	[土木工程學系 ] 研究計畫

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