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(1 上海隧道工程股份有限公司，上海 200080； 2 上海大學(xué)力學(xué)所，上海 200072；3 上海理工大學(xué)城市建筑與環(huán)境工程學(xué)院，上海 200093)

［摘要］對建筑結(jié)構(gòu)常用的加固結(jié)構(gòu)膠材料進(jìn)行了常溫和超常溫試驗(yàn)。設(shè)計(jì)制作了36個正拉試件進(jìn)行粘結(jié)抗拉試驗(yàn)，試驗(yàn)溫度在18.5℃～120℃之間。此外，制作了18個剪切試件進(jìn)行粘結(jié)剪切試驗(yàn)，試驗(yàn)溫度在25℃～60℃之間，在試驗(yàn)結(jié)果對比分析的基礎(chǔ)上研究了結(jié)構(gòu)膠粘結(jié)性能隨溫度變化的規(guī)律。研究表明，溫度對粘結(jié)性能的影響較顯著，超常溫(“高溫”)狀態(tài)下結(jié)構(gòu)膠粘結(jié)承載力急劇下降，溫度升高至60℃粘結(jié)抗拉強(qiáng)度急劇下降，而溫度升高至45℃后粘結(jié)抗剪強(qiáng)度與剪切模量急劇下降。

［關(guān)鍵詞］建筑物加固；結(jié)構(gòu)膠；粘結(jié)性能；高溫；剪切模量

Experimental study on bonding behavior of structural adhesives under high temperature

Liu Kai¹, Luo Ren’an², Chen Youliang³(1 Shanghai Shield Tunneling Engineering Co., Ltd., Shanghai 200080, China； 2 Mechanics Department, Shanghai University,Shanghai 200072, China； 3 University of Shanghai for Science and Technology, Shanghai 200093, China)

Abstract:The structural adhesives used in buildings reinforcement were tested under normal and higher temperature conditions. The 36 specimens were tested under tensile strength at the temperature between 18.5℃～120℃.In addition,and 18 specimens were tested under shear strength at the temperature between 25℃～60℃. By the comparison and analysis of experimental results, the variation rule of the bonding behavior of structural adhesives with the increase of the temperature was studied. It is concluded that the temperature effect on the bonding behavior is quite obvious, and at higher temperature the bonding carrying capacity of structural adhesives declined rapidly. The bonding tensile strength is reduced greatly when the temperature reached 60℃, while the bonding shear strength and shear modulus are reduced dramatically when the temperature reached 45℃.

Keywords:buildings reinforcement; structural adhesive; bonding behavior; high temperature; shear modulus

上海市教委重點(diǎn)科研基金資助項(xiàng)目(04AB05)；上海市重點(diǎn)學(xué)科建設(shè)項(xiàng)目資助。

通訊作者：羅仁安，教授，博士，Email:luorenan@163.com。

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