GFRP杆连接预制夹心保温墙板受弯性能试验  

Experimental Investigation on Flexural Performance of Precast Sandwich Insulation Panels with GFRP Screw Connectors

作　　者：张健新 张鑫 陈庞 张婷玮 ZHANG Jianxin;ZHANG Xin;CHEN Pang;ZHANG Tingwei(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin,China,300401;Civil Engineering Technology Research Center of Hebei Province,Tianjin,China,300401)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]河北省土木工程技术研究中心,天津300401

出　　处：《沈阳建筑大学学报（自然科学版）》2024年第2期203-211,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(52208160);河北省高等学校科学技术研究项目(CXY2023016)。

摘　　要：目的 为提高预制夹心保温墙板的受弯性能和保温性能,增强内外层混凝土墙板的复合作用,提出一种采用GFRP螺杆连接内外层混凝土的预制夹心保温墙板。方法 设置GFRP板替代部分纵向或横向钢筋以便于GFRP螺杆在内外层混凝土中的锚固,对4个试件进行单调加载试验,分析墙板的破坏模式、荷载-位移曲线、保温材料与混凝土之间的滑移、裂缝宽度和复合作用等。结果 采用GFRP板或钢板局部替代纵向钢筋的试件具有较好的承载能力、变形能力、延性性能和复合作用;所有预制夹心保温墙板均发生弯曲破坏,GFRP螺杆或普通钢螺杆均可以有效在内外层混凝土之间传力,限制混凝土与保温材料之间的滑移;采用GFRP螺杆连接的预制夹心保温墙板QB1的复合程度系数比普通钢螺杆连接墙板QB3的复合程度系数提高了25%。结论 笔者提出的新型GFRP螺杆连接内外层混凝土的预制夹心保温墙板具有良好的承载能力和变形能力,且整体性优异,螺杆能够有效在上下层混凝土墙板间传力,复合程度系数高于50%。In order to improve the flexural and thermal insulation performance of the precast sandwich insulation panel and strengthen the composite action of the inner and outer panels,this paper proposes a type of precast sandwich insulation panels using GFRP screw connectors to connect the inner and outer layer panels.Meanwhile,GFRP plate was set to replace part of longitudinal or transverse reinforcements,which facilitates the anchorage of GFRP screw connectors in the inner and outer layer concrete panels.The monotone loading tests of four specimens were carried out to analyze the failure mode,load-displacement curve,slip between thermal insulation material and concrete,crack width and composite action of the panels.The results show that the specimens that the partially longitudinal reinforcements were replaced by the GFRP plates or steel plates had good load bearing capacity,deformation capacity,ductility and composite action.All precast sandwich insulation panels occurred bending failure.GFRP screw connectors or ordinary steel connectors can effectively transfer force between the inner and outer concrete panels,limiting the slip between the concrete and thermal insulation material.The composite degree coefficient of precast sandwich insulation panel QB1 with GFRP screw connectors was 25%higher than that of QB3 with ordinary steel screw connectors.The new type of precast sandwich insulation panels using GFRP screw connectors to connect the inner and outer layer panels has good bearing capacity and deformation capacity,and its integrity is excellent,and the screw can effectively transfer force between the inner and outer concrete panels,the composite degree coefficient is higher than 50%.

关 键 词：预制夹心保温墙板 GFRP螺杆 受弯性能 复合作用 

分 类 号：TU375.4[建筑科学—结构工程]