玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5697

Y. Sonobe, Y. Matsuzaki, Hiroyuki Nakamura, M. Iso, Masayuki Watanabe

引用次数: 9

Japanese State of the Art on Seismic Retrofit by Fiber Wrapping for Building Structures: Evaluations 日本建筑结构纤维包覆抗震加固技术现状:评价

玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5695

S. Fujii, Y. Matsuzaki, K. Nakano, H. Fukuyama

引用次数: 1

Seismic Retrofit of Reinforced Concrete Columns by Fiber Sheet Wrapping without Removal of Finishing Mortar and Side Wall Concrete 不去除饰面砂浆和侧墙混凝土的纤维包覆钢筋混凝土柱抗震加固

玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5623

H. Fukuyama, H. Suzuki, H. Nakamura

{"title":"Seismic Retrofit of Reinforced Concrete Columns by Fiber Sheet Wrapping without Removal of Finishing Mortar and Side Wall Concrete","authors":"H. Fukuyama, H. Suzuki, H. Nakamura","doi":"10.14359/5623","DOIUrl":"https://doi.org/10.14359/5623","url":null,"abstract":"In seismic retrofit of existing buildings, there is a great demand that retrofitting work can be done while continuing operations in the building. In order not to disrupt the normal operations in the building, strict limitations on the amount of noise vibration, dust, and on the use of fire need to be adopted. Since some evaluation methods of retrofitting effects for wrapped RC independent columns with continuous fiber sheets which has an advantage in construction work were proposed, applications of this method are dramatically increasing in Japan. However, these evaluation methods can not be applied to the columns with side walls and columns with finishing mortar. When this retrofitting method is applied to these types of columns, finishing is removed and side wall concrete at the boundary portion of the columns is also removed to treat the column with side walls as an independent rectangular column. Then development of the newly effective retrofitting method is necessary to meet the above-mentioned strong demand. This paper reports the test results on retrofitting effect of RC columns with finishing mortar without removal of finishing and RC columns with side walls without removal of the side wall concrete at the boundary portion. Test results indicate the feasibility of the seismic retrofit of RC columns by fiber sheet wrapping with out removal of finishing and side wall concrete.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"11624 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81620349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Strengthening of Bridge G270 with Externally Bonded Carbon Fiber Reinforced Polymer Reinforcement 外粘接碳纤维增强聚合物加固G270桥梁

玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5643

R. Mayo, A. Nanni, W. Gold, M. Barker

{"title":"Strengthening of Bridge G270 with Externally Bonded Carbon Fiber Reinforced Polymer Reinforcement","authors":"R. Mayo, A. Nanni, W. Gold, M. Barker","doi":"10.14359/5643","DOIUrl":"https://doi.org/10.14359/5643","url":null,"abstract":"A pilot study to apply externally bonded CFRP sheets to strengthen a simple span reinforced concrete solid slab bridge was presented. The objective was to remove the current load posting. This bridge is a load posted structure on a heavy truck route. Strengthening with CFRP sheets was accomplished in three days without traffic interruption. Preparation consisted of light sandblasting and no concrete repair. The University of Missouri at Rolla conducted the pilot study for the Missouri Department of Transportation. The testing procedure included the construction of two test beams to simulate bridge deck performance with and without strengthening. Laboratory setup, instrumentation and test results of two full-scale test beams are presented. Field load tests of the bridge were performed by the University of Missouri at Columbia to verify the increase in flexural strength achieved with the application of externally bonded CFRP. The method used to instrument and field load test the bridge along with the subsequence load-deflection characteristics is presented. Comparisons are made between the analytical model, laboratory beam specimens strengthened with CFRP, and in situ field tests of the actual bridge before and after strengthening.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84514223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Engineering Model for Forecast of Stress Rupture Strength of Stressed Aramid Fiber Reinforced Polymer Bars Embedded in Concrete 混凝土内嵌应力芳纶纤维钢筋应力断裂强度预测工程模型

玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5694

F. S. Rostásy, M. Scheibe

{"title":"Engineering Model for Forecast of Stress Rupture Strength of Stressed Aramid Fiber Reinforced Polymer Bars Embedded in Concrete","authors":"F. S. Rostásy, M. Scheibe","doi":"10.14359/5694","DOIUrl":"https://doi.org/10.14359/5694","url":null,"abstract":"AFRP tensile elements (bars, strands, etc.) can be successfully applied for the pretensioning of precast concrete members, for post-tensioning tendons, ground anchors etc. In such applications, the AFRP may come into permanent contact with the alkaline pore solution of concrete or cementitious grout. Many tests prove that such aggressive environment may seriously damage the stressed AFRP and significantly abbreviate its lifetime due to premature stress rupture. The serviceability and safety of FRP is the relevant durability property to ensure the serviceability and safety of a structural concrete member during its service life. The stress rupture behavior is usually studied on stressed AFRP bars placed in aggressive solutions, etc. It is though evident that such severe environment does not realistically reflect the true environment of AFRP in dense concrete and grout. It was therefore the aim of the authors to develop - on basis of experiments in several stages and the theoretical studies - an engineering model for the prediction of the stress rupture strength of stressed AFRP in concrete or grout. This model was verified by tests. Provided the stress rupture strength of AFRP in dry air or in alkaline solutions etc. was experimentally established afore-hand, the deliberations are however necessary to transfer the model into the real environment of concrete or grout around the FRP element. Suitable procedures are presented.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"151 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85013708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

New Device for In Situ Testing of Fiber Reinforced Polymer/Concrete Adhesion 一种新型纤维增强聚合物/混凝土粘结性原位测试装置

玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5639

G. Mullins, R. Race, R. Sen, J. From

{"title":"New Device for In Situ Testing of Fiber Reinforced Polymer/Concrete Adhesion","authors":"G. Mullins, R. Race, R. Sen, J. From","doi":"10.14359/5639","DOIUrl":"https://doi.org/10.14359/5639","url":null,"abstract":"Fiber reinforced polymer (FRP) is proving to be increasingly cost-effective as a solution for the repair and rehabilitation of substandard concrete structures. As the integrity of the repair is dependent of the FRP/concrete bond, its evaluation for both acceptance and long-term maintenance purposes is of obvious importance. FRP/concrete adhesion is currently evaluated from the more common tension test or the less used shear test. In either test, a metal disk called a dolly is bonded to the FRP surface. The forced needed to separate the dolly under tensile or shear loads is used to determine the FRP-concrete interface adhesion. The similarity of the procedures for the two tests suggests it would be logical to develop a single device that could be used to conduct both in-situ tension and shear tests. The basis and development of a new device that allows both tension and shear tests to be carried out in-situ are described. The device is simple to use and only requires an instrumented socket wrench to apply the separation load. Preliminary results from tests carried out to assess the role of different surface finishes on the FRP/concrete bond are presented to demonstrate the application of the device.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78005560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tests on Axially Loaded Concrete Columns Confined by Fiber Reinforced Polymer Sheet Wrapping 纤维增强聚合物薄膜包裹约束下混凝土轴向受压柱的试验研究

玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5624

S. Matthys, L. Taerwe, K. Audenaert

引用次数: 140

Critical Review of Plate Anchorage Stresses in Premature Debonding Failures of Plate Bonded Reinforced Concrete Beams 钢板粘结钢筋混凝土梁过早脱粘破坏中钢板锚固应力的评述

玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5637

P. Mukhopadhyaya, R. N. Swamy

{"title":"Critical Review of Plate Anchorage Stresses in Premature Debonding Failures of Plate Bonded Reinforced Concrete Beams","authors":"P. Mukhopadhyaya, R. N. Swamy","doi":"10.14359/5637","DOIUrl":"https://doi.org/10.14359/5637","url":null,"abstract":"One of the major disadvantages of the plate bonding technology is the premature and brittle debonding failure of the bonded plate. It has been assumed, quite logically, that the stress concentration at the plate end is the primary cause of such premature plate debonding failure. However, there is no direct evidence of the validity of these stresses agree with the experimental data or not. Also there is concern if they can form the basis and criteria for the design and prevention of debonding failures. This paper presents a critical analysis of the calculated peak shear and normal stress values at the plate end using Roberts' approximate model, and derived from a wide range of published data involving steel, glass fiber reinforced polymer (GFRP) and carbon fiber reinforced polymer (CFRP) plates. It is shown that these calculated stresses are far too high, and cover unacceptably wide range of values, without any consistent pattern of variation with the plate stiffness. It is clear that the peak stresses are influenced by other parameters which are not taken into account in the approximate model used in the calculations. The wide range of the peak stresses cannot form a reliable basis to explain or design the prevention of premature plate debonding failures.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"403 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76532475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Deflection of Reinforced Concrete Beams Reinforced by Fiber Reinforced Polymer Grids with Various Joint Designs 不同节点设计下纤维增强聚合物网格加固钢筋混凝土梁的挠度

玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5680

R. Engel, M. Croyle, C. Bakis, A. Nanni

引用次数: 7

Uniaxial Tensile Behavior of Reinforced Concrete Elements Strengthened by Carbon Fiber Sheet 碳纤维板加固钢筋混凝土构件的单轴拉伸性能

玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5665

Y. Sato, K. Shouji, T. Ueda, Y. Kakuta

引用次数: 9

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