SP-264: Serviceability of Concrete Members Reinforced with Internal/External FRP Reinforcement最新文献

Effective Moment of Inertia of Concrete Beams Prestressed with Aramid Fiber-Reinforced Polymer (AFRP) Tendons 芳纶纤维增强聚合物(AFRP)预应力混凝土梁的有效惯性矩

SP-264: Serviceability of Concrete Members Reinforced with Internal/External FRP Reinforcement Pub Date : 2009-10-01 DOI: 10.14359/51663265

Y. Kim

引用次数: 0

The Story Behind Proposed Changes to ACI 440 Deflection Requirements for FRP-Reinforced Concrete 建议修改aci440 frp钢筋混凝土挠度要求背后的故事

SP-264: Serviceability of Concrete Members Reinforced with Internal/External FRP Reinforcement Pub Date : 2009-10-01 DOI: 10.14359/51663260

P. Bischoff, S. Gross, C. E. Ospina

{"title":"The Story Behind Proposed Changes to ACI 440 Deflection Requirements for FRP-Reinforced Concrete","authors":"P. Bischoff, S. Gross, C. E. Ospina","doi":"10.14359/51663260","DOIUrl":"https://doi.org/10.14359/51663260","url":null,"abstract":"This paper will discuss how serviceability related to deflections and cracking often controls design of fiber reinforced polymer (FRP) reinforced concrete. The existing approach prescribed in ACI 318 for computing deflection of steel reinforced concrete overestimates member stiffness when FRP is used as the reinforcement. Deflection is then underestimated. Numerous proposals have consequently been made for computing deflection of FRP reinforced concrete, and have mostly involved modifications to Branson’s original ACI expression for the effective moment of inertia Ie. This paper reviews the different procedures used in the past by ACI Committee 440 to compute deflection of FRP reinforced concrete members, and discusses deficiencies of past and present ACI 440.1R deflection calculation guidelines. A case is made for the need to adopt a more rational approach to compute deflection and the basis for proposed changes are reviewed and explained in detail. A statistical comparison of past, present, and proposed approaches for computing deflection are compared with an experimental database that justifies the need for a more rational approach to computing deflection. The paper ends with a clear set of deflection procedures for carrying out serviceability design of FRP reinforced concrete.","PeriodicalId":205144,"journal":{"name":"SP-264: Serviceability of Concrete Members Reinforced with Internal/External FRP Reinforcement","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128345960","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: 32

Deflection Control of Reinforced Concrete Beams and One-Way Slabs with Externally Bonded FRP 外粘FRP筋混凝土梁与单向板的挠度控制

SP-264: Serviceability of Concrete Members Reinforced with Internal/External FRP Reinforcement Pub Date : 2009-10-01 DOI: 10.14359/51663264

C. E. Ospina

引用次数: 2

Effect of Sustained Loads on Flexural Crack Width in Concrete Beams Reinforced with Internal FRP Reinforcement 持续荷载对FRP内加固混凝土梁受弯裂缝宽度的影响

SP-264: Serviceability of Concrete Members Reinforced with Internal/External FRP Reinforcement Pub Date : 2009-10-01 DOI: 10.14359/51663258

S. Gross, J. Yost, D. J. Stefanski

引用次数: 3

Effective Moment of Inertia Expression for Concrete Beams Reinforced with Fiber-Reinforced Polymer (FRP) 纤维增强聚合物(FRP)加固混凝土梁的有效惯性矩表达式

SP-264: Serviceability of Concrete Members Reinforced with Internal/External FRP Reinforcement Pub Date : 2009-10-01 DOI: 10.14359/51663261

H. Vogel, D. Svecova

{"title":"Effective Moment of Inertia Expression for Concrete Beams Reinforced with Fiber-Reinforced Polymer (FRP)","authors":"H. Vogel, D. Svecova","doi":"10.14359/51663261","DOIUrl":"https://doi.org/10.14359/51663261","url":null,"abstract":"This paper will discuss that due to concerns with corrosion, the use of fiber reinforced polymer (FRP) as a replacement to conventional steel reinforcement has greatly increased over the last decade. However, elastic modulus values of some commercially available FRP reinforcement hardly reach 20% of that for conventional steel. Existing code relationships for conventional steel have been modified to address this proprietary difference but the modifications are restricted by the empirical nature of the expressions. This paper provides an alternate approach to estimate the deflection of concrete beams by considering effects of tension stiffening that incorporate material properties of the reinforcement as well as the effects of concrete non-linearity in compression. A database containing experimental load-deflection records from 139 glass FRP (GFRP) and 48 carbon FRP (CFRP) reinforced concrete beams was used to calibrate a tension stiffening model for the proposed approach and establish its accuracy as well as precision through statistical analysis. Results were compared to those obtained from existing relationships and indicate that the revised approach provides higher accuracy at service conditions ranging from 25% to 80% of ultimate.","PeriodicalId":205144,"journal":{"name":"SP-264: Serviceability of Concrete Members Reinforced with Internal/External FRP Reinforcement","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132783116","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: 2

Deflection Control for FRP-Reinforced Concrete Members: An Overview frp -钢筋混凝土构件挠度控制综述

SP-264: Serviceability of Concrete Members Reinforced with Internal/External FRP Reinforcement Pub Date : 2009-10-01 DOI: 10.14359/51663257

A. Scanlon

引用次数: 0

Modified Branson’s Formula for Deflection of FRP Strengthened Concrete Beams FRP加固混凝土梁挠度的修正布兰森公式

SP-264: Serviceability of Concrete Members Reinforced with Internal/External FRP Reinforcement Pub Date : 2009-10-01 DOI: 10.14359/51663263

H. Rasheed, H. Charkas

引用次数: 1

Deflection and Cracking Behavior of RC Beams Strengthened in Flexure 钢筋混凝土受弯加固梁的挠曲与开裂行为

SP-264: Serviceability of Concrete Members Reinforced with Internal/External FRP Reinforcement Pub Date : 2009-10-01 DOI: 10.14359/51663262

S. Matthys, L. Taerwe

引用次数: 4

Cracking and Deflection Behavior of One-Way Parking Garage Slabs Reinforced with CFRP Bars CFRP筋单向停车库板的开裂与挠曲特性

SP-264: Serviceability of Concrete Members Reinforced with Internal/External FRP Reinforcement Pub Date : 2009-10-01 DOI: 10.14359/51663259

S. El-Gamal, B. Benmokrane, E. El-Salakawy

引用次数: 6

Significance of Cracking Uncertainty on Predicting Deflection of FRC-RC Beams 开裂不确定性对frp - rc梁挠度预测的意义

SP-264: Serviceability of Concrete Members Reinforced with Internal/External FRP Reinforcement Pub Date : 2009-10-01 DOI: 10.14359/51663267

Jung J. Kim, A. Said, M. Taha

{"title":"Significance of Cracking Uncertainty on Predicting Deflection of FRC-RC Beams","authors":"Jung J. Kim, A. Said, M. Taha","doi":"10.14359/51663267","DOIUrl":"https://doi.org/10.14359/51663267","url":null,"abstract":"This paper will present an alternative approach to examine uncertainty in predicting deflections of fiber-reinforced polymer-reinforced concrete (FRP-RC) beams. The use of nonspecificity of concrete cracking as a measure of cracking variability is proposed. Non-specificity is a type of uncertainty associated with having multiple alternatives to define variables (e.g. modulus of rupture, tensile strength to describe cracking). Nonspecificity in cracking can be described by considering cracking strength interval. Using a cracking strength interval, deflection intervals of FRP-RC beams are calculated. Deflection is modeled using cracked plane frame analysis integrated with recent models describing concrete tension stiffening with fiber reinforced polymers (FRP) reinforcement. A deflection database of FRP-RC beams is developed and examined. The uncertainty in deflection prediction is evaluated by comparing the measured deflection from the database with respect to the predicted deflection interval. The significance of deflection prediction parameters on the uncertainty in predicting deflection of FRP-RC beams was analyzed. It is shown that when the applied moment to cracking moment ratio gets close to unity, the uncertainty in predicting deflection of concrete beams reinforced with FRP increases.","PeriodicalId":205144,"journal":{"name":"SP-264: Serviceability of Concrete Members Reinforced with Internal/External FRP Reinforcement","volume":"9 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134458023","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