玻璃钢最新文献_第10页

Fiber Reinforced Polymer Reinforcement for Concrete Structures 混凝土结构用纤维增强聚合物增强材料

玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5619

E. Shehata, R. Morphy, S. Rizkalla

{"title":"Fiber Reinforced Polymer Reinforcement for Concrete Structures","authors":"E. Shehata, R. Morphy, S. Rizkalla","doi":"10.14359/5619","DOIUrl":"https://doi.org/10.14359/5619","url":null,"abstract":"An experimental program conducted at the University of Manitoba, Canada, to examine the structural performance of fiber reinforced polymer (FRP) stirrups as shear reinforcement for concrete structures is summarized. A total of ten large-scale reinforced concrete beams were tested to investigate the modes of failure and the contribution of the FRP stirrups in the beam mechanism. The ten beams included four beams reinforced with carbon FRP stirrups, four beams reinforced with glass FRP, one beam reinforced with steel stirrups and one control beam without shear reinforcement. The variables are the material type of the stirrups, the material type of the flexural reinforcement, and the stirrup spacing. Due to the unidirectional characteristics of FRP, significant reduction in the strength of the stirrup relative to the tensile strength parallel to the fibers is introduced by bending FRP bars into stirrup configuration and by the kinking action due to inclination of the diagonal shear crack with respect to the direction of the stirrups. A total of 40 specially designed panel specimens were tested to investigate the bend effect on the stirrup capacity, along with two control specimens reinforced with steel stirrups. The variables considered in the bend specimens are the material type of stirrups, the bar diameter, then bend radius, the configuration of the stirrup anchorage, and the tail length beyond the bend portion. A total of 12 specially designed panel specimens were also tested to investigate the effect of the angle of cracks on the stirrup capacity. The two variables considered in this case are material type of the stirrups and the crack angle. Description of the experimental program, test results and design recommendations are presented.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87955283","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: 45

Feasibility Study for High-Strength Spun Concrete Pylon Prestressed with Carbon Fiber Reinforced Plastic for Transmitting Voltages at 110 kV Level 碳纤维增强塑料预应力高强自旋混凝土塔传输110千伏电压的可行性研究

玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5646

G. Terrasi, U. Meier, B. Burkhardt

引用次数: 0

Retrofit of Reinforced Concrete Bridges with Carbon Fiber Reinforced Polymer Composites 碳纤维增强聚合物复合材料对钢筋混凝土桥梁的改造

玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5644

C. Pantelides, J. Gergely, L. Reaveley, Vladimir A. Volnyy

引用次数: 5

Experimental Study on Friction Factor for Fiber Reinforced Polymer Tendons in Pretensioned Prestressed Concrete Members 预应力混凝土构件中纤维增强聚合物筋摩擦系数试验研究

玻璃钢 Pub Date : 1999-01-01 DOI: 10.14359/5677

M. Khin, M. Tanaka, K. Venkataramana, T. Harada

引用次数: 1

Long-Term Behavior of Anchorage for Carbon Fiber Reinforced Polymer Strands Using Highly Expansive Material 高膨胀材料碳纤维增强聚合物链锚固的长期行为

玻璃钢 Pub Date : 1999-01-01 DOI: 10.14359/5676

T. Harada, T. Enomoto, M. Khin, T. Idemitsu

{"title":"Long-Term Behavior of Anchorage for Carbon Fiber Reinforced Polymer Strands Using Highly Expansive Material","authors":"T. Harada, T. Enomoto, M. Khin, T. Idemitsu","doi":"10.14359/5676","DOIUrl":"https://doi.org/10.14359/5676","url":null,"abstract":"Investigation of long term characteristics of the Highly Expansive Material (HEM) anchorage for CFRP strands is very important. In the post-tensioning type of prestressed concrete structures, considerations should be made for the loss of prestressing force due to the pull-out displacement which is caused by the creep of the HEM. The long-term characteristics of the HEM anchorage were investigated by creep test on five specimens. From the creep test, some important characteristics of HEM anchorage were observed, for example, time-dependent change of pull-out displacement at the loaded end, unit shear \"q\" distributions and the tensile force distributions \"Tp\". An analytical relationship on how the long-term behavior of prestressing force can be predicted by using the measured values for the time-dependent change of pull-out displacement at the loaded end is presented. Also from the simulated results of this relationship, it was found that the loss of prestressing force is negligible in practice when the CFRP strand is 10 meters long. Normally the expansive pressure of HEM at prestressing is 50MPa. However, when the expansive pressure is 100MPa, the pull-out displacement at the loaded end and the loss of prestressing force can be reduced to more than the half of one with 50 MPa.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81258972","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

Verification of Safety and Serviceability of Concrete Structures Retrofitted with Externally-Bonded Continuous Fiber Materials 外粘接连续纤维材料加固混凝土结构的安全性和适用性验证

玻璃钢 Pub Date : 1999-01-01 DOI: 10.14359/5693

T. Shimomura, H. Mutsuyoshi, Z. Wu, A. Kobayashi, T. Ishibashi

{"title":"Verification of Safety and Serviceability of Concrete Structures Retrofitted with Externally-Bonded Continuous Fiber Materials","authors":"T. Shimomura, H. Mutsuyoshi, Z. Wu, A. Kobayashi, T. Ishibashi","doi":"10.14359/5693","DOIUrl":"https://doi.org/10.14359/5693","url":null,"abstract":"The technical research committee on continuous fiber (CF) sheet in Japan Society of Civil Engineers (JSCE) has been engaged in making a new design system for concrete structures retrofitted with externally-bonded CF sheets since 1998. This paper presents the framework and some tentative contents of the design system. The system is on the basis of the concept of performance-based design, in which a structure to be retrofitted is systematically verified if it can satisfy any required performance items during the residual service life. Performance items of structure are verified in terms of the verification index which represents each performance item quantitatively. Evaluation methods for several performance items under development are shown in this paper regarding structural safety and serviceability of structures. The importance of precise prediction of peeling-off the CF sheet from concrete is emphasized. In the verification process of performance items, time-dependent performance changes due to environmental and loading attack are taken into account, so that structural and durability design are unified in a rational way.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80588921","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