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梁端鋼絲網(wǎng)約束RC帶板梁抗震性能研究*
馬華1,于磊磊1,趙培忠2, 李振寶1
摘 要
(1 北京工業(yè)大學(xué)工程抗震與結(jié)構(gòu)診治北京市重點實驗室,北京 100124;2 中國航空技術(shù)北京有限公司,北京 100101)
 
[摘要]試驗共設(shè)計了4個試件,其中1個為對比試件,另外3個為在梁端塑性鉸區(qū)鋼筋骨架外側(cè)綁扎不同層數(shù)和不同網(wǎng)格間距的鍍鋅焊接鋼絲網(wǎng)的加強(qiáng)試件。通過低周反復(fù)加載試驗,研究在低周反復(fù)荷載作用下鍍鋅焊接鋼絲網(wǎng)加強(qiáng)試件與對比試件的受力特性、破壞特征、滯回曲線、延性和剛度退化等抗震性能的變化。試驗結(jié)果表明,梁端綁扎鍍鋅焊接鋼絲網(wǎng)能夠有效改善和延緩混凝土保護(hù)層的脫落,試件的延性、剛度退化程度明顯好于梁端未綁扎鍍鋅焊接鋼絲網(wǎng)的試件。
[關(guān)鍵詞]鋼筋混凝土梁板柱節(jié)點; 鍍鋅焊接鋼絲網(wǎng); 約束混凝土抗震性能
中圖分類號:TU375      文獻(xiàn)標(biāo)識碼:A      文章編號:1002-848X(2014)23-0074-06
 
Seismic behavior study on reinforced concrete beam with slab and beam-end steel mesh constraint
Ma Hua1, Yu Leilei1, Zhao Peizhong2, Li Zhenbao1
 (1 Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China; 2 AVIC Iternational Beijing Company Limited, Beijing 100101, China)
 
Abstract: Four members were designed in the test, including comparison one and another three members with different layers and apertures of galvanized welded steel mesh assembled outside of hoop reinforcement in the area of beam-end plastic hinge area. Through the low-cyclic loading test, the seismic behaviors of the four members were studied including mechanical characteristics, damage characteristics, hysteresis curve, ductility and stiffness degradation. Test results show that assembling the galvanized welded steel mesh at beam end can effectively improve and delay the spall of the concrete cover, and help the ductility and the stiffness degradation level behave significantly better than those of the regular member.
Keywords: RC beam-slab-column joint; galvanized welded steel mesh; seismic performance of confined concrete
*國家自然科學(xué)基金(51178014,51078011)。
作者簡介:馬華,副研究員,碩士生導(dǎo)師,Email:mahua67@hotmail.com。
 
參考文獻(xiàn)
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