火災(zāi)后SRC柱-RC梁節(jié)點(diǎn)滯回性能試驗(yàn)研究*
李國華1，2，謝龍1,2，徐艷龍1,2
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（1 北京建筑大學(xué)土木與交通工程學(xué)院，北京 100044；2 北京建筑大學(xué)工程結(jié)構(gòu)與新材料北京高等學(xué)校工程研究中心，北京 100044）
［摘要］為考察SRC柱-RC梁節(jié)點(diǎn)火災(zāi)后的滯回性能，對三個(gè)試件進(jìn)行了試驗(yàn)研究。未過火試件A直接進(jìn)行梁端低周往復(fù)荷載作用下的擬靜力試驗(yàn)；試件B和試件C在進(jìn)行擬靜力試驗(yàn)前，首先分別進(jìn)行升溫時(shí)間為60min和90min的過火試驗(yàn)。研究表明，火災(zāi)后SRC柱-RC梁節(jié)點(diǎn)的延性、耗能能力等各項(xiàng)滯回性能指標(biāo)均有下降，且下降幅度隨過火時(shí)間的延長而增大。對比分析了過火時(shí)間對各項(xiàng)滯回性能指標(biāo)的影響，并對今后進(jìn)一步的研究提出建議。［關(guān)鍵詞］SRC柱-RC梁節(jié)點(diǎn); 過火試驗(yàn); 滯回性能中圖分類號(hào)：TU317， TU398 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2016)09-0075-04
Study on the hysteretic behavior of SRC column-RC beam joints after fireLi Guohua1,2, Xie Long1,2, Xu Yanlong1,2（1 School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; 2 Beijing Higher Institution Engineering Research Center of Structural Engineering and New Materials, Beijing University of Civil Engineering and Architecture, Beijing 100044, China）Abstract: In order to investigate the hysteretic behavior of SRC column-RC beam joints, the pseudo-static experiments were carried out on three specimens. The pseudo-static experiment under low cyclic loading at the beam ends was directly carried out on specimen A without undergoing the fire. Before the pseudo-static experiment, the specimens B and C had firstly been through a fire experiment, which heating time is 60min and 90min respectively. The results show that hysteretic behaviors including the ductility and energy dissipation capacity of the SRC column-RC beam joints are decreased, which reduced significantly with the increase of the heating time. The impact of the heating time on the hysteretic behaviors was compared and analyzed, and suggestions were put forward for further research.Keywords: SRC column-RC beam joint; fire test; hysteretic behavior
*北京市教育委員會(huì)科技計(jì)劃面上項(xiàng)目（PXM2013014210000147）。作者簡介：李國華，博士，講師，Email: liguohua@bucea.edu.cn。
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