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(1 西安建筑科技大學(xué)省部共建西部綠色建筑國家重點(diǎn)實(shí)驗(yàn)室，西安 710055；2 西安建筑科技大學(xué)土木工程學(xué)院，西安 710055)
［摘要］ 綜合國內(nèi)外相關(guān)研究成果，從粘結(jié)應(yīng)力組成、粘結(jié)強(qiáng)度計(jì)算、粘結(jié)滑移本構(gòu)以及粘結(jié)性能有限元分析等方面對鋼管混凝土的界面粘結(jié)研究現(xiàn)狀進(jìn)行了總結(jié)，結(jié)果表明：粘結(jié)應(yīng)力主要由化學(xué)膠結(jié)力、機(jī)械咬合力及摩擦力組成，摩擦力承擔(dān)界面主要的抗剪作用；對粘結(jié)強(qiáng)度影響較大的因素為鋼管形狀、鋼管尺寸及界面粗糙程度，其他影響因素得到的結(jié)論并不一致；現(xiàn)有的粘結(jié)強(qiáng)度試驗(yàn)值均未考慮材料自重影響，低估了實(shí)際的粘結(jié)強(qiáng)度，計(jì)算發(fā)現(xiàn)美國規(guī)范對粘結(jié)強(qiáng)度的取值較為合理。在此基礎(chǔ)上，對鋼管混凝土界面粘結(jié)的研究進(jìn)展進(jìn)行了分析，認(rèn)為新型鋼管混凝土及特殊環(huán)境下鋼管混凝土的粘結(jié)性能和機(jī)理有待繼續(xù)深入探索。
［關(guān)鍵詞］鋼管混凝土； 界面粘結(jié)性能； 粘結(jié)強(qiáng)度； 粘結(jié)滑移本構(gòu)
中圖分類號：TU398-9 文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2021)12-0091-07
Research status and analysis progress of the interfacial bond performance of concrete-filled steel tubes
WANG Qiuwei1,2, WANG Chengwei2, LIU Le2, HAN Wenchao2
(1 State Key Laboratory of Green Building in Western China, Xi’an University of Architecture and Technology，Xi’an 710055， China；2 College of Civil Engineering, Xi’an University of Architecture and Technology，Xi’an 710055， China)
Abstract: Based on the relevant research results at home and abroad, the present situation of concrete-filled steel tube (CFST) bond performance is summarized from the aspects of the bond stress composition, the bond strength calculation, the bond slip constitutive and the finite element analysis of bond performance. The results show that the bond stress is composed of chemical bond force, mechanical bite force and friction force, and the friction force mainly bears the shear resistance of the interface. The shape and size of steel tube and the interface roughness are the major factors influencing the bonding strength, while the conclusions about other factors are not very consistent. The existing test researches on bond strength have not taken into account the impact of material weight, thus underestimating the bond strength of CFST. Then it is found that the American code is more reasonable for predicting the bond strength after recalculation. On this basis, the research progress on the interface bond of CFST is analyzed, and it is considered that the bond performance and mechanism of new CFST and CFST under special circumstances need to be further explored.
Keywords:concrete-filled steel tube； interfacial bond behavior； bond strength； bond-slip constitutive relation
*國家自然科學(xué)基金項(xiàng)目(51878543, 51878540)，陜西省教育廳科學(xué)研究計(jì)劃項(xiàng)目(20JS078)。
作者簡介：王秋維，博士，教授，博士生導(dǎo)師，Email: wqw0815@126.com。
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