改性活性粉末混凝土装配式梁柱节点界面粘结抗折性能试验研究  

Experimental study on the bonding and flexural performance of MRPC fabricated beam-column joints

作　　者：陈浩 王雨晗 刘国安 栾学立 秦浩 谢群 CHEN Hao;WANG Yuhan;LIU Guoan;LUAN Xueli;QIN Hao;XIE Qun(School of Civil Engineerin,Shandong Jianzhu University,Jinan 250101,China;School of Architecture and Urban Planning,Shandong Jianzhu University,Jinan 250101,China;Key Laboratory of Building Structural Retrofitting and Underground Space Engineering of the Ministry of Education,Shandong Jianzhu University,Jinan 250101,China;Engineering Research Institute of Appraisal and Strengthening,Shandong Jianzhu University,Jinan 250013,China;School of Civil Engineering and Architecture,University of Jinan,Jinan 250022,China)

机构地区：[1]山东建筑大学土木工程学院,山东济南250101 [2]山东建筑大学建筑城规学院,山东济南250101 [3]山东建筑大学建筑结构加固改造与地下空间工程教育部重点实验室,山东济南250101 [4]山东建大工程鉴定加固研究院,山东济南250013 [5]济南大学土木建筑学院,山东济南250022

出　　处：《新型建筑材料》2021年第10期157-161,177,共6页New Building Materials

基　　金：国家自然科学基金项目(51878395);山东建大工程鉴定加固研究院项目(H19230Z);建筑结构加固改造与地下空间工程教育部重点实验室课题。

摘　　要：改性活性粉末混凝土(MRPC)是一种在强度、韧性和耐久性等方面都表现出高性能的混凝土,能够保证装配式梁柱节点界面具有良好的粘结性能。通过三分点抗折试验对预制普通混凝土(NC)和后浇MRPC粘结构件抗折性能进行研究,分析了不同界面处理方式和温度对MRPC-NC粘结构件抗折性能的影响。结果表明:露骨料界面处理方式得到的粘结构件抗折强度最高,NC与MRPC的交界面具有良好的粘结性;粘结抗折破坏形式有粘结面破坏和NC破坏2种;抗折强度随着粘结面粗糙度增大而提高,但随着温度的升高,粗糙度的影响作用减弱,抗折强度随温度升高急剧降低。Modified reactive powder concrete(MRPC)is a kind of concrete that exhibits high performance in terms of strength,toughness and durability,which can ensure good bonding properties at the interface of fabricated beam-column nodes.The three-point flexural test was carried out to study the flexural performance of precast concrete normal concrete(NC)and post-cast concrete MRPC after bonding,and the influence of different interface treatment methods and temperatures on the flexural performance of MRPC-NC bonded components was analyzed.The results show that the bonding component obtained by the exposed aggregate interface treatment method has the highest flexural strength,and the interface between NC and MRPC has good cohesiveness;the bond flexural failure mode includes bonding surface failure and NC failure;The strength increases as the roughness of the bonding surface increases,but as the temperature increases,the effect of the roughness decreases,and the flexural strength decreases sharply with the increase in temperature.

关 键 词：改性活性粉末混凝土 粘结面 抗折强度 界面处理方式 温度 

分 类 号：TU375.4[建筑科学—结构工程]