نتایج جستجو برای: محصورکنندهی cfrp

تعداد نتایج: 3596  

Journal: :Comp.-Aided Civil and Infrastruct. Engineering 2008
Hoon Sohn Seung Dae Kim Kent Harries

Fiber-reinforced polymer (FRP) composite materials have been widely used for retrofitting civil infrastructure systems. The ultimate goal of this study was to develop an in-site non-destructive testing (NDT) technique that can continuously and autonomously inspect the bonding condition between a carbon FRP (CFRP) layer and a host reinforced concrete (RC) structure, when the CRFP layer is used f...

ژورنال: :مهندسی عمران و محیط زیست 2015
فخر الدین دانش بهارک برادران نویری

کاربرد مواد frp بدلیل داشتن ویژگی های ممتازی چون نسبت بالای مقاومت به وزن، دوام در برابر خوردگی و سرعت و سهولت در حمل و نصب، به سرعت رو به افزایش است. استفاده از میلگردهای frp به جای میلگردهای فولادی به­طور قابل ملاحظه ای از زیان های ناشی از بروز خوردگی در اعضای بتنی به خصوص در سازه های مجاور آب هاجلوگیری می‏ کند. در این مقاله به منظور بررسی اثر جایگزینی آرماتورهای فولادی ستون با آرماتورهایfrp...

2012
V. K. Nelson S. Karthikeyan

Axisymmetric vibration of an infinite Pyrocomposite circular hollow cylinder made of inner and outer pyroelectric layer of 6mm-class bonded together by a Linear Elastic Material with Voids (LEMV) layer is studied. The exact frequency equation is obtained for the traction free surfaces with continuity condition at the interfaces. Numerical results in the form of data and dispersion curves for th...

2012
Zhen-Guo Li Yi-Heng LI

This paper is concerned with analysis for the strengthening effect of carbon fiber-reinforced polymer (CFRP) on steel columns under cyclic lateral loading in thermal environment. Based on the finite element theory of thermo-elastic problem and steel structure stability theory, the hysteretic behavior of axial compression steel columns was studied by using Ansys software. The main variables inve...

2003
J. G. Teng J. F. Chen

A large wall with vertical cracks at mid-span, varying in width of up to 3 mm wide, had been declared capable of resisting a postulated seismic load. It was not straightforward to subsequently confirm, analytically, what influence the crack had on the wall’s capacity for lateral loading. It was assumed that it was likely that the horizontal reinforcement had yielded across the crack and thus th...

2015
Huping Xu Jiajun Zhu Bang Wang

Coverage and connectivity are two important performance metrics in wireless sensor networks. In this paper, we study the sensor placement problem to achieve both coverage and connectivity. Instead of using the simplistic disk coverage model, we use our recently proposed confident information coverage model as the sensor coverage model. The grid approach is applied to discretize the sensing fiel...

2008
A. Iwasaki A. Todoroki S. Izumi S. Sakai

The present paper proposes a new diagnostic tool for the structural health monitoring that employs a Kriging Interpolation. Structural health monitoring is a noticeable technology for aged civil structures. Most of the structural health monitoring systems adopts parametric method based on modeling or non-parametric method such as artificial neural networks or response surfaces. The conventional...

Journal: :international journal of civil engineering 0
a. ahmed a kajang, malaysia s. naganathan kajang, malaysia k. nasharuddin kajang, malaysia m.m. fayyadh kuala lumpur

the effect of steel plate thickness on the repair effectiveness of rc beam is presented in this paper. a total of four beams were tested, one beam repaired by cfrp with a thickness of 1.2 mm and used as a control beam, and three beams repaired by a steel plate. steel plates with a thickness of 2 mm, 3 mm, and 4 mm were used in repairing the beams. the maximum load-carrying capacity, deflection ...

2004
Ahmed Mahmoud Khalifa

Shear collapse of reinforced concrete (RC) members is catastrophic and occurs suddenly with no advance warning of distress. In several occasions existing RC beams have been found to be deficient in shear and in need of strengthening. Conventional shear strengthening methods such as external post tensioning, member enlargement along with internal transverse steel, and bonded steel plates are ver...

فخر الدین دانش مهناز شاهرودی

هدف از این تحقیق، بررسی ظرفیت شکل پذیری ستون های بتنی تقویت شده با الیاف CFRP است. بدین منظور پس از ارائه تعاریف کلیدی و مروری بر تحقیقات انجام شده، المان‌ها و مدل‌های رفتاری بتن، FRP و میلگردها در نرم افزار مورد بررسی قرار گرفته است. پس از آن نحوه مدل سازی شرح داده شده و ضمن بررسی و مقایسه با کارهای آزمایشگاهی، مدل مورد نظر صحت سنجی شده است. پس از کالیبره کردن نتایج نرم افزار با نتایج ارائه شد...

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