FRP拉结件增强预制混凝土夹心外挂墙板抗弯性能研究  

Study on flexural behavior of precast concrete sandwich external panels reinforced with FRP connectors

作　　者：刘霞[1] 汪昕[1] 杨谭 吴智深[1] LIU Xia;WANG Xin;YANG Tan;WU Zhishen(Key Laboratory of C&PC Structures Ministry of Education,Southeast University,Nanjing 211189,China)

机构地区：[1]东南大学混凝土及预应力结构教育部重点实验室,南京211189

出　　处：《建筑结构》2025年第6期45-52,共8页Building Structure

基　　金：中央高校基本科研业务费专项资金资助(2242022k30031、2242022k30033)。

摘　　要：基于纤维增强塑料(FRP)拉结件增强预制混凝土夹心外挂墙板的四点抗弯试验,研究了玄武岩纤维复合材料(BFRP)拉结件、玻璃纤维复合材料(GFRP)拉结件及拉结件布置间距等参数,获得了试件的破坏模式、荷载-位移曲线、承载力及延性性能。结果表明:GFRP拉结件端部的十字形扩大头造成了保温层破坏、粘结性能降低;圆锥形的BFRP拉结件对混凝土扰动小,粘结锚固可靠;夹心混凝土板内、外叶混凝土板独立工作,FRP拉结件不传递剪力;混凝土局部破碎、GFRP拉结件层间剪切破坏会导致GFRP拉结件夹心外挂墙板延性性能差、抗弯承载力低;BFRP拉结件夹心混凝土墙板具有较好的延性性能,其延性系数大于4.0。Based on the four⁃point bending test of precast concrete sandwich external panels reinforced with fiber reinforced plastic polymer(FRP)connectors,parameters including basalt fiber reinforced plastic polymer(BFRP),glass fiber reinforced plastic polymer(GFRP)and layout spacing were analyzed,and the failure modes,load⁃displacement curves,load bearing capacity and structure ductility of the specimens were obtained.The results show that the enlarged head with“cross shape”of GFRP connector causes the damage of insulation layer,resulting in the reduction of bonding performance.While the conical BFRP connector has little disturbance to the concrete and the bonding anchorage is reliable.The inner and outer leaf concrete slabs of sandwich concrete slabs work independently,and the FRP connectors do not transform shear force.Poor ductility and low flexural capacity of precast concrete sandwich external panels with GFRP connectors was attributed to the local crushing of concrete and inter⁃laminar shear failure of GFRP.The precast concrete sandwich external panels with BFRP connectors exhibit good ductility performance with the ductility coefficient greater than 4.0.

关 键 词：预制混凝土夹心墙 BFRP拉结件 GFRP拉结件 抗弯性能 破坏模式 结构延性 

分 类 号：TU377[建筑科学—结构工程]