frp约束混凝土在持续荷载作用下的冻融性能

SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI:10.14359/14862

A. Kong, A. Fam, M. Green

{"title":"frp约束混凝土在持续荷载作用下的冻融性能","authors":"A. Kong, A. Fam, M. Green","doi":"10.14359/14862","DOIUrl":null,"url":null,"abstract":"Synopsis: Fiber-reinforced polymers (FRPs) are effective in strengthening concrete structures. However, little work has examined the effects of cold regions on the behavior of the strengthened members, particularly the combined effects of sustained loading and freeze-thaw exposure. This paper presents the results of an experimental study on the durability of 70 normal weight, low strength, and non-air entrained concrete cylinders (150 x 300mm). The cylinders were confined with glass-FRP (GFRP) sheets or carbon-FRP (CFRP) sheets and exposed to 300 freeze-thaw cycles while under sustained axial compression loads. FRP-wrapped cylinders showed exceptional durability performance after their extreme exposure to freeze-thaw and sustained loading with a maximum of 12% reduction in strength. Some CFRP wrapped cylinders that were exposed to freeze-thaw without longitudinal restraint, by means of sustained loads, and all the plain concrete cylinders were completely disintegrated with virtually zero residual strength.","PeriodicalId":151616,"journal":{"name":"SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures","volume":"28 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"12","resultStr":"{\"title\":\"Freeze-Thaw Behavior of FRP-Confined Concrete under Sustained Load\",\"authors\":\"A. Kong, A. Fam, M. Green\",\"doi\":\"10.14359/14862\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Synopsis: Fiber-reinforced polymers (FRPs) are effective in strengthening concrete structures. However, little work has examined the effects of cold regions on the behavior of the strengthened members, particularly the combined effects of sustained loading and freeze-thaw exposure. This paper presents the results of an experimental study on the durability of 70 normal weight, low strength, and non-air entrained concrete cylinders (150 x 300mm). The cylinders were confined with glass-FRP (GFRP) sheets or carbon-FRP (CFRP) sheets and exposed to 300 freeze-thaw cycles while under sustained axial compression loads. FRP-wrapped cylinders showed exceptional durability performance after their extreme exposure to freeze-thaw and sustained loading with a maximum of 12% reduction in strength. Some CFRP wrapped cylinders that were exposed to freeze-thaw without longitudinal restraint, by means of sustained loads, and all the plain concrete cylinders were completely disintegrated with virtually zero residual strength.\",\"PeriodicalId\":151616,\"journal\":{\"name\":\"SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures\",\"volume\":\"28 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2005-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"12\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.14359/14862\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.14359/14862","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 12

摘要

摘要:纤维增强聚合物(frp)是一种有效的混凝土结构加固材料。然而，很少有研究研究寒冷地区对加固构件行为的影响，特别是持续加载和冻融暴露的综合影响。本文介绍了70个正常重量，低强度，无空气混凝土圆柱体(150 x 300mm)耐久性的实验研究结果。钢瓶被玻璃-玻璃钢(GFRP)薄板或碳-玻璃钢(CFRP)薄板约束，在持续轴压载荷下暴露300次冻融循环。frp包裹的钢瓶在极端暴露于冻融和持续加载后表现出优异的耐久性，强度最大降低了12%。在持续荷载作用下，部分CFRP包裹圆柱体在不受纵向约束的情况下冻融，所有素混凝土圆柱体完全解体，残余强度几乎为零。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Freeze-Thaw Behavior of FRP-Confined Concrete under Sustained Load

Synopsis: Fiber-reinforced polymers (FRPs) are effective in strengthening concrete structures. However, little work has examined the effects of cold regions on the behavior of the strengthened members, particularly the combined effects of sustained loading and freeze-thaw exposure. This paper presents the results of an experimental study on the durability of 70 normal weight, low strength, and non-air entrained concrete cylinders (150 x 300mm). The cylinders were confined with glass-FRP (GFRP) sheets or carbon-FRP (CFRP) sheets and exposed to 300 freeze-thaw cycles while under sustained axial compression loads. FRP-wrapped cylinders showed exceptional durability performance after their extreme exposure to freeze-thaw and sustained loading with a maximum of 12% reduction in strength. Some CFRP wrapped cylinders that were exposed to freeze-thaw without longitudinal restraint, by means of sustained loads, and all the plain concrete cylinders were completely disintegrated with virtually zero residual strength.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures

自引率

0.00%

发文量