نتایج جستجو برای: پوشش frp
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This paper reports on nine relevant applications of FRP composites in concrete structures in the United States. Strengthening of concrete members with externally bonded FRP laminates or near surface mounted (NSM) bars has received remarkable attention. FRP materials have been used in small projects and some multi-million dollar projects for strengthening parking garages, multi-purpose conventio...
یکی از مشکلات مطرح در دوام و رفتار سازههای بتن مسلح، خوردگی آرماتور است که بررسی تأثیر آن بر رفتار سازهای به دلیل تغییراتی که در عملکرد سازه ایجاد مینماید، اهمیت دارد. درک کامل ماهیت خوردگی، عوامل مؤثر و چگونگی فرایند شروع خوردگی در یک سازه از جمله مواردی هستند که مطالعه آنها برای تعیین رفتار سازه پس از وقوع خوردگی لازم است. از طرفی در سالهای اخیر استفاده از ورقهای frp در تقویت سازههای بت...
This paper presents a study on interfacial stresses of a concrete column confined by fiber-reinforced plastic (FRP) plate, which has been widely applied in the civil engineering for rehabilitation and retrofitting of conventional structures. It is assumed that both the FRP plate and concrete structures are elastic and the interface between them is perfectly bonded. An analytical model for analy...
ستون های توخالی بتن مسلح برای کاهش هزینه و کاهش نسبت وزن به سختی اعضا - مثل ستون پل ها و شمع ها - استفاده می شوند. در نظرگرفتن ستون به عنوان یک عضو کاملاً فشاری معمولاً درست نیست، چرا که اغلب خروج از مرکزیت وجود دارد. وقتی نیروی فشاری با خروج از مرکزیت وارد می شود لنگر خمشی هم اضافه می شود. بنابراین مقاومت بتن مسلح تحت خمش دو محوره و بارگذاری محوری ضروری است، چون بار خارج از مرکز، یک بار محوری و ...
UNLABELLED RP170, 1-(2-hydroxy-1-[hydroxymethyl]ethoxy)methyl-2-nitroimidazole, is a new hypoxic radiosensitizer. We recently succeeded in labeling this compound with 18F to make 18F-FRP170, 1-(2-fluoro-1-[hydroxymethyl]ethoxy)methyl-2-nitroimidazole. In this study, we attempted to visualize the ischemic but viable myocardium of rats as hot-spot images using 18F-FRP170. We also compared the dis...
Debonding failure is the main failure mode in flexurally strengthened reinforced concrete beams by externally bonded or near surface mounted fibre reinforced polymer (FRP) composites. It is believed that FRP debonding will be initiated if the shear stress on the concrete-FRP interface reaches the tensile strength of concrete. However, it was found through experimental and analytical studies tha...
Near-real time estimates of biomass burning emissions are important for air quality monitoring and forecasting. We present here the preliminary analysis of global biomass burning emission product (GBBEP) produced from geostationary-satellite-derived fire radiative power (FRP) in near-real time. Specifically, the FRP is retrieved at an interval of 15 to 30 minutes using WF_ABBA_V65 (Wildfire Aut...
Characterizing changes in landscape fire activity at better than hourly temporal resolution is achievable using thermal observations of actively burning fires made from geostationary Earth Observation (EO) satellites. Over the last decade or more, a series of research and/or operational “active fire” products have been developed from geostationary EO data, often with the aim of supporting bioma...
OBJECTIVE To examine the expression level and function of follistatin-related protein gene (FRP, also referred to as FSTL1) in rheumatoid arthritis (RA), and possible association of its polymorphisms with genetic susceptibility to RA. METHODS FRP mRNA expression levels in the synovial tissues from 10 patients with RA and 5 patients with OA were measured using real-time RT-PCR. Effects on the ...
Repairing deteriorated concrete bridge piers using externally wrapped FRP (fiber reinforced polymer) composites has been proven as an effective approach. This technique has also been applied to low-rise building structures. Failures in FRP-wrapped concrete structures may occur by flexural failures of critical sections or by debonding of FRP plate from the concrete substrate. Debonding in the FR...
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