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(1 山東建筑大學(xué)土木工程學(xué)院， 濟(jì)南 250101; 2 建筑結(jié)構(gòu)加固改造與地下空間工程教育部重點(diǎn)實(shí)驗(yàn)室， 濟(jì)南 250101)
［摘要］綠色高性能纖維增強(qiáng)水泥基復(fù)合材料（green high-performance fiber-reinforced cementitious composites，GHPFRCC）是具有高韌性、卓越的裂縫控制能力、高耗能特點(diǎn)的新型綠色建筑材料，具有較好的抗震應(yīng)用前景。首先進(jìn)行了混凝土梁柱節(jié)點(diǎn)和GHPFRCC梁柱節(jié)點(diǎn)的低周往復(fù)荷載試驗(yàn)，在驗(yàn)證模型有效性的基礎(chǔ)上，利用OpenSees對GHPFRCC梁柱節(jié)點(diǎn)的抗震性能進(jìn)行軸壓比、GHPFRCC澆筑范圍的參數(shù)化分析。結(jié)果表明：OpenSees數(shù)值模擬的混凝土梁柱節(jié)點(diǎn)和GHPFRCC梁柱節(jié)點(diǎn)滯回曲線與試驗(yàn)值吻合較好；提高軸壓比可以增強(qiáng)節(jié)點(diǎn)的抗剪承載力，但會降低節(jié)點(diǎn)延性，建議軸壓比取值0.3~0.5；GHPFRCC可以增強(qiáng)梁柱節(jié)點(diǎn)的抗震性能，節(jié)點(diǎn)核心區(qū)及600~900mm梁端范圍澆筑GHPFRCC可以有效改善節(jié)點(diǎn)的抗震性能。
［關(guān)鍵詞］高性能纖維增強(qiáng)水泥基復(fù)合材料；梁柱節(jié)點(diǎn)；抗震性能；抗剪承載力
中圖分類號：TU375-4 文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2021)15-0088-06
Study on seismic behavior of green high-performance fiber-reinforced cementitious composites beam-column joint
LI Yan1,2, LI Xiuling1,2
(1 School of Civil Engineering, Shandong Jianzhu University, Jinan 250101， China; 2 Key Laboratory of Building Structural Retrofitting and Underground Space Engineering, Ministry of Education, Jinan 250101， China)
Abstract:Green high-performance fiber-reinforced cementitious composites (GHPFRCC) is a new type of green building material with high toughness, excellent crack-control capacity and energy consumption，which has a good prospect in seismic application. Low-cycle reciprocating load tests of a concrete beam-column joint and a GHPFRCC beam-column joint was carried out firstly. Based on the validity of the model, the seismic performance of GHPFRCC beam-column joint was analyzed by OpenSees for parametric analysis of axial compression ratio and GHPFRCC pouring range. The results show that the hysteresis curves of concrete beam-column joint and GHPFRCC beam-column joint simulated by OpenSees are in good agreement with the experimental values. Increasing the axial compression ratio can enhance shear bearing capacitie of joint, however, the ductility of the joint will decrease, and the axial compression ratio is recommended to be 0.3~0.5. GHPFRCC can enhance seismic performances of beam-column joint when it is used in the joint pouring, and pouring GHPFRCC in core area and 600~900mm beam length can effectively improve seismic performances of joint.
Keywords:high-performance fiber-reinforced cementitious composites； beam-column joint； seismic behavior； shear bearing capacitie
*國家自然科學(xué)基金項(xiàng)目（51108253, 51278290），中國地震局工程力學(xué)研究所實(shí)驗(yàn)室開放課題（2019D10），山東省高校土木結(jié)構(gòu)防災(zāi)減災(zāi)協(xié)同創(chuàng)新中心開放課題（XTM201901）。
作者簡介：李言，碩士研究生，Email: 2872975795@qq.com；通信作者：李秀領(lǐng)，博士，教授，碩士生導(dǎo)師，Email: lixiuling_2006@sdjzu.edu.cn。
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