نتایج جستجو برای: دورپیچ cfrp

تعداد نتایج: 3640  

2012
Guibing Li Yugang Guo Xiaoyan Sun

It is an effective way to improve the flexural behavior of reinforced concrete (RC) members by externally bonded carbon fiber reinforcement polymer (CFRP) laminates on the soffit of the members. However, there is little investigation on flexural performance of RC beam flexurally strengthened by side-bonded FRP laminates. To investigate the flexural behavior of RC beams side-bonded CFRP laminate...

پایان نامه :دانشگاه بین المللی امام خمینی (ره) - قزوین - دانشکده فنی 1391

سازه های بتنی فراوانی وجود دارند که به دلایل گوناگون نیاز به مقاوم سازی دارند. در میان روش های مختلف مقاوم سازی استفاده از ورق های پلیمری مسلح به الیاف frp به عنوان روشی کارآمد و بهینه با استقبال رو به رشدی مواجه بوده است. با توجه به اینکه در سیستم های مقاوم سازی با frp، مقاومت سطحی بتن بستر تاثیر تعیین کننده ای بر اتصال و چسبندگی بین frp و بتن دارد، در این تحقیقات، مطالعه آزمایشگاهی و تحلیلی ب...

2014
Jun Ding Fang Wang Xia Huang Song Chen

This paper reports the effects of carbon fiber-reinforced polymer (CFRP) length on the failure process, pattern and crack propagation for a strengthened concrete beam with an initial notch. The experiments measuring load-bearing capacity for concrete beams with various CFRP lengths have been performed, wherein the crack opening displacements (COD) at the initial notch are also measured. The app...

2012
Toshiyuki ISHIKAWA Takeshi MIYASHITA

In the application of multiple Carbon Fiber-Reinforced Plastic (CFRP) plates onto a structural steel member, stepping of the CFRP plate ends is often adopted to prevent debonding. This approach requires the nonuniform extension of CFRP plate lengths. In this study, to shorten the length of CFRP plates, a nonuniform overlapping arrangement of several CFRP plate ends was proposed and the theoreti...

2016
Ji-Hua Zhu Guanping Guo Liangliang Wei Miaochang Zhu Xianchuan Chen

The mechanical and electrochemical performance of carbon fiber-reinforced polymer (CFRP) were investigated regarding a novel improvement in the load-carrying capacity and durability of reinforced concrete structures by adopting CFRP as both a structural strengthener and an anode of the impressed current cathodic protection (ICCP) system. The mechanical and anode performance of CFRP were investi...

2014
Xu Xie Xiaozhang Li Yonggang Shen

In this study, the scope of CFRP cables in cable-stayed bridges is studied by establishing a numerical model of a 1400-m span of the same. The mechanical properties and characteristics of CFRP stay cables and of a cable-stayed bridge with CFRP cables are here subjected to comprehensive analysis. The anomalies in the damping properties of free vibration, nonlinear parametric vibration and wind f...

2009
B. Lanier D. Schnerch S. Rizkalla

This paper introduces a strengthening technique for steel monopole towers using high-modulus carbon fiber reinforced polymer (CFRP) materials. The technique is based on a theoretical and analytical investigation including testing large scale steel monopole towers strengthened with different CFRP materials and connection details. Based on the research findings, design aspects and installation pr...

2016
Haifeng Fan Anastasios P. Vassilopoulos Thomas Keller

Pull-out experiments were performed on three carbon fiber-reinforced polymer (CFRP) ground anchors simulating their applications in different rock types which provided different confinement levels. The CFRP tendons comprised, on the ground side, a prefabricated conical anchor body of high-strength grout in which two CFRP straps were embedded. The anchors reached an average load-bearing capacity...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده مهندسی عمران 1392

الیاف کربن پلیمری مسلح یا cfrp، دریچه ی جدیدی را برای مقاوم سازی یا تعمیر اعضای بتنی که تحت بارگذاری زیاد، ضربه، خوردگی، آتش سوزی و یا نشست آسیب دیده اند، فراهم آورده است. یکی از روش های راحت و اثبات شده که در دهه های اخیر برای افزایش ظرفیت برشی تیرهای بتنی مسلح بسیار مورد استفاده قرار می گیرد؛ چسبانیدن ورقcfrp به صورت قائم یا مورب در اطراف تیر است؛ اما به دلیل این که ضریب پوآسون ورق های cfrp ب...

2006
M. Dawood

Research on the use of CFRP materials for retrofit and strengthening of steel bridges and structures has increased in recent years. In order to implement these types of strengthening systems to longer span members, it is important to establish an effective method to splice adjacent lengths of CFRP laminates. This paper describes an experimental program to investigate the bond behavior of carbon...

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