既有鋼筋混凝土梁抗震性能試驗(yàn)研究*
冷巧娟,錢江,張熠,魯亮,呂西林
- 摘 要
-
(同濟(jì)大學(xué)土木工程防災(zāi)國家重點(diǎn)試驗(yàn)室,上海 200092)[摘要]既有鋼筋混凝土構(gòu)件的特性不同于擬建構(gòu)件,除了可能存在設(shè)計(jì)構(gòu)造方面的不足之外,還受到所經(jīng)受的荷載歷程和環(huán)境腐蝕的影響。根據(jù)5根既有鋼筋混凝土梁的低周往復(fù)加載試驗(yàn),得到了既有鋼筋混凝土梁的破壞特征。根據(jù)試驗(yàn)中得到的滯回曲線計(jì)算既有鋼筋混凝土梁的耗能能力和延性,分析了不同的加載制度對其耗能能力的影響。結(jié)論表明,既有構(gòu)件所經(jīng)歷的最大荷載及最大荷載出現(xiàn)的相對時序均會影響到既有構(gòu)件的抗震性能。[關(guān)鍵詞]既有鋼筋混凝土梁;荷載歷程;低周反復(fù)加載;抗震性能中圖分類號:TU311.1文獻(xiàn)標(biāo)識碼:A文章編號:1002-848X(2011)08-0026-03Experimental study on seismic performance of existing reinforced concrete beamsLeng Qiaojuan, Qian Jiang, Zhang Yi, Lu Liang, Lü Xilin(State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092,China)Abstract:The characteristics of existing reinforced concrete members may be influenced by load histories and environmental corrosion besides insufficiency in design. Based on the test results of five existing reinforced concrete beams,the failure characteristics of existing reinforced concrete beams were studied. Energy dissipation capacity and ductility of existing reinforced concrete beams were calculated according to the hysteretic curves obtained in test. The influences of different loading regimes on the energy dissipation capacity of existing reinforced concrete beams were analyzed. The study indicates that the maximum displacement in the load histories is an important influence factor to the seismic behavior of existing reinforced concrete members.Keywords:existing reinforced concrete beam; load history; low reversed cyclic loading; seismic behavior*973國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(2007CB714202)。作者簡介:冷巧娟,博士研究生,Email:lengqiaojuan1983@163.com。參考文獻(xiàn)[1]陶峰, 王林科, 王慶霖. 服役鋼筋混凝土構(gòu)件承載力的試驗(yàn)研究[J].工業(yè)建筑,1996,26(4):17-20.[2]劉興遠(yuǎn), 周珉, 陳偉,等. 既有鋼筋混凝土梁工作特性試驗(yàn)研究[J]. 四川建筑科學(xué)研究,2002,28(3):17-18.[3]吳波, 劉志強(qiáng), 林少書,等. 香港現(xiàn)役鋼筋混凝土連梁的抗震性能試驗(yàn)研究[J]. 世界地震工程,2002,18(2):9-16.[4]雷拓, 呂西林, 錢江,等. 既有鋼筋混凝土框架原位推覆試驗(yàn)研究[J].建筑結(jié)構(gòu)學(xué)報(bào),2009,30(5) :23-30.[5]PARK R, DAI R\|T. Ductility of doubly reinforced concrete beam sections[J].ACI structural Journal, 1989,85(2):217-225.[6]任寶雙, 錢稼茹, 聶建國. 在用鋼筋混凝土簡支橋面梁受彎剛度估算[J]. 工業(yè)建筑, 2001, 31(1):13-15.[7]劉興遠(yuǎn), 周 珉,鄧安福.既有鋼筋混凝土梁工作特性數(shù)值分析[J]. 四川建筑科學(xué)研究, 2002, 28(4):7-9.[8]屈文俊, 張譽(yù), 車惠民. 既有混凝土結(jié)構(gòu)的碳化預(yù)測[J]. 建筑結(jié)構(gòu), 1999,29(4): 31-37.[9]朱伯龍. 結(jié)構(gòu)抗震試驗(yàn)[M]. 北京: 地震出版社, 1989.
- 下載地址
-