预制地聚物混凝土夹心墙板轴心受压性能研究  

Research on Mechanical Properties of Precast Geopolymer Concrete Sandwich Panels Under Axial Compression

作　　者：赵猛 黄俊旗[1,2] 种迅 蒋庆[1,2] 冯玉龙 ZHAO Meng;HUANG Junqi;CHONG Xun;JIANG Qing;FENG Yulong(College of Civil Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Key Laboratory of Civil Engineering and Materials,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009 [2]土木工程结构与材料安徽省重点实验室,合肥230009

出　　处：《工业建筑》2024年第6期169-176,共8页Industrial Construction

基　　金：国家自然科学基金项目(52208158);安徽省自然科学基金项目(2208085QE172)。

摘　　要：设计并制作了6片采用地聚物混凝土和玻璃纤维增强复合材料(GFRP)六角筒形拉结件的预制混凝土夹心墙板试件,对其进行了轴心受压试验,研究了拉结件间距、墙板高度和钢筋混凝土叶板厚度3个关键参数对墙板轴压下的破坏模式、承载力、变形等的影响。试验结果表明:试件均呈现因二阶效应产生的大偏心受压破坏,表现为一侧叶板混凝土压碎和另一侧叶板混凝土水平开裂;随着拉结件间距的增加,墙板的组合性能降低,破坏时混凝土压碎区域面积减小,侧向变形增大,试件承载力逐渐降低(当拉结件间距由300 mm增加至600、 900 mm以及不设置拉结件时,承载力分别下降了17.1%、42.0%、49.5%。);随着墙板高度的减小或混凝土叶板厚度的增加,构件的长细比和二阶效应逐渐减小,破坏时混凝土压碎区面积增大,平面外变形减小,试件的承载力增加(当叶板厚度由50 mm增至75 mm时或高度从2 100 mm降至1 500 mm时,试件承载力分别提高了34.3%、5.9%)。Six precast geopolymer concrete sandwich panels enabled by glass fiber reinforced polymer(GFRP)hexagonal tubular connectors were fabricated and tested under axial compression.The effects of three key parameters,including the connector spacing,panel height and wythe thickness,on the failure mode,bearing capacity and deformation of the specimens under axial compression were studied and discussed.The results showed that all specimens exhibited large eccentric compression failure due to the second-order effect,which was characterized by the concrete crushing and horizontal cracking in the two wythes,respectively;with the increase of the distance between the connectors,the composite performance of the wall panel was reduced,the area of the concrete crushing area decreased,the lateral deformation increased,and the bearing capacity of the specimens decreased gradually(when the distance between the connectors increased from 300 mm to 600,900 mm,and without connectors,the bearing capacity decreased by 17.1%,42.0%,49.5%,respectively).With the decrease of the height of the wall panel or the increase of the thickness of the wythes,the slenderness ratio and the second-order effect of the specimens gradually decreased,the area of the concrete crushing zone increased,the out-of-plane deformation decreased,and the bearing capacity of the specimen increased(when the thickness of the wythes increased from 50 mm to 75 mm or the height decreased from 2100 mm to 1500 mm,the bearing capacity of the specimen increased by 34.3%and 5.9%,respectively).

关 键 词：地聚物混凝土 预制混凝土夹心墙板 FRP拉结件 轴心受压 破坏模式 

分 类 号：TU756.4[建筑科学—建筑技术科学]