- 摘 要
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(同濟(jì)大學(xué)結(jié)構(gòu)工程與防災(zāi)研究所,上海 200092)
[摘要]完成八個(gè)偏壓型鋼混凝土柱單調(diào)加載試驗(yàn)研究,柱的變化參數(shù)為鋼骨型號(hào)、長(zhǎng)細(xì)比、偏心距。分析了型鋼、鋼筋、混凝土、受壓區(qū)箍筋的應(yīng)變對(duì)柱受力性能影響,對(duì)比了柱的荷載撓度曲線(xiàn),分析了型鋼含量對(duì)變形性能的影響。分別列舉了包括規(guī)程法在內(nèi)的長(zhǎng)細(xì)比、受拉翼緣、縱筋應(yīng)力兩種計(jì)算方法并與試驗(yàn)結(jié)果進(jìn)行了對(duì)比,對(duì)不同計(jì)算方法進(jìn)行了評(píng)價(jià)。通過(guò)合理的理論分析,推薦了與試驗(yàn)結(jié)果吻合較好的型鋼混凝土柱臨界保護(hù)層厚度計(jì)算公式。當(dāng)柱截面尺寸較小時(shí),為提高規(guī)程計(jì)算方法的精度,規(guī)程公式中初始偏心距ea取值可作適當(dāng)調(diào)整。
[關(guān)鍵詞]殘余荷載;長(zhǎng)細(xì)比;臨界保護(hù)層厚度;應(yīng)變差值;偏心距增大系數(shù)
Research on the static performance of eccentric steel reinforced concrete column
Yu Qiong, Lu Zhoudao (Research Institute of Structural Engineering and Disaster Reduction,Tongji University, Shanghai 200092, China)
Abstract:The test of eight eccentric steel reinforced concrete columns were conducted under static load, and the related parameters were the dimension of profiled steel,slenderness ratio and eccentricity. The strain change effects of profiled steel, steel, concrete, stir-up of the pressure area to column performance were discussed, the load-displace curves were compared,and the influence of steel percentage composition to deformation of column was concluded.Each two kinds of method (including standard means ) to calculate slenderness ratio, flange and steel stress of the tension area were listed, the results were compared to the test,and the conclusion was draw. The formula concerning the flange girth width and concrete strength to calculate the thickness of critical covering layer is proposed based on analysis of theory and experiment. The code formula to calculate initial eccentricity ea can be revised when the column dimension is small,and a better result can be obtained.
Keywords:residual capacity;slenderness ratio;critical covering layer;strain difference;enhancement coefficient of eccentricity
作者簡(jiǎn)介:余瓊(1968-),女,安徽人,高級(jí)工程師,Email:yiongyu2005@163.com。
參考文獻(xiàn)
[1]JGJ138—2001/J130—2001型鋼混凝土組合結(jié)構(gòu)技術(shù)規(guī)程[S].北京:中國(guó)建筑工業(yè)出版社,2002.
[2]馬傳政,李小梅,王連廣,等.鋼骨高強(qiáng)混凝土偏壓柱受力分析[J].沈陽(yáng)建筑大學(xué)學(xué)報(bào),2006,22(3):388-392.
[3]白國(guó)良,秦華福. 型鋼鋼筋混凝土原理與設(shè)計(jì)[M].上海:上??茖W(xué)出版社,2000,1:20-23.
[4]馮乃謙,葉列平,譯. 鋼骨鋼筋混凝土結(jié)構(gòu)計(jì)算標(biāo)準(zhǔn)及其說(shuō)明[M].(日本建筑學(xué)會(huì),1987年)原子能出版社,1998.
[5]孫國(guó)梁,王英杰.勁性混凝土端部軸力傳遞性能的試驗(yàn)研究與計(jì)算[J].建筑結(jié)構(gòu)學(xué)報(bào),1989,(6):40-49.
[6]李向明.勁性骨架高強(qiáng)混凝土結(jié)構(gòu)性能研究[D].上海:同濟(jì)大學(xué),1999,6.
[7]鄭山鎖,楊勇,薛建陽(yáng),等. 型鋼混凝土結(jié)構(gòu)粘結(jié)滑移性能研究[J].土木工程學(xué)報(bào),2002,35(4):47-51.
[8]鄭山鎖,鄧國(guó)專(zhuān),楊勇,等.型鋼混凝土結(jié)構(gòu)粘結(jié)滑移性能試驗(yàn)研究[J].工程力學(xué),2003,20(5):63-69.
[9]楊勇,趙鴻鐵,薛建陽(yáng),等. 型鋼混凝土粘結(jié)機(jī)理與粘結(jié)強(qiáng)度的研究[J].西安建筑科技大學(xué)學(xué)報(bào),2001,33(5):103-107.
[10]葉列平.勁性混凝土偏心受壓中長(zhǎng)柱的試驗(yàn)研究[J].建筑結(jié)構(gòu)學(xué)報(bào),1995,16(6):45-52.
[11]白國(guó)良,趙鴻鐵.小偏心受壓型鋼混凝土柱的承載力計(jì)算[J].西安建筑科技大學(xué)學(xué)報(bào),1999,31(3):1-7.
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