pull-out test campaign
| 18:53 Oct 3, 2019 |
| English to Russian translations [Non-PRO] Tech/Engineering - Architecture / земельные работы | |||||||
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| 3 | испытания на определение силы, необходимой для / на cжатие высокой прочности |
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1 hr confidence: 
испытания на определение силы, необходимой для / на cжатие высокой прочности Explanation: http://www.matest.com/ru/бетон/en-стандарты-испытательные-ма... Испытательные прессы “высокой стабильности” отвечают самым строгим требованиям стандартов: EN 12390-4 | BS 1881:115 | DIN 51220 | UNI 6686, часть 3 | NF P18-411 | UNE 83304 | ASTM C39 | AASHTO T22 Прессы изготавливаются с повышенными требованиями к качественным характеристикам (механическая обработка и допуск): рамы;цилиндро-поршневого узла; шарнирной опоры; нажимных пластин; проставок и т. д., что соответствует и удовлетворяет высокому контролю стабильности (распределение усилия). Соблюдение сертификации по стабильности испытаний требует контроля самовыравнивания верхней нажимной пластины с применением 5-ти точечного силоизмерителя, подключенного к цифровому регистратору данных. 3.1 Experimental campaign of pull-out tests The main objective of this investigation is related to the performance of anchorage details in cracked concrete similar to those used as transverse reinforcement for punching. The diameter of the bars was limited to 10 and 14 mm in order to serve as a good representation of the uses of practice in reinforced concrete flat slabs. The test campaign was divided into two series of pull‐outs depending on the type of cracks. It was originally inspired by the reference work conducted by Rehm in the late 1970’s [Reh79], to which several modifications and improvements were brought. a new analytical tool to predict the full range behaviour of a fully grouted rockbolt subjected to a tensile load. This tool is of particular interest to predict the pull-out response of a long rockbolt (in terms of axial displacement, axial load and shear stress along the embedded length), for which the shear stress is not uniformly distributed. The innovation of the new approach consists in using boundary conditions that are solely related to the bolt free end. This new tool is limited to monotonic loadings and is only valid if the bolt remains in the elastic range during the whole loading process. The experimental study has been conducted at two different scales, although most of it has been undertaken in the laboratory. Pull-out tests have been carried out using a new experimental bench, designed before the beginning of this thesis, but tuned and put into operation during the Ph.D. The tests have been conducted under constant outer radial confinement and constant outer radial stiffness conditions. The tested samples are composed of a rock sample, a grouting material, a bolt and a metallic tube that is grouted along the bolt length that protrudes from the rock borehole. https://pastel.archives-ouvertes.fr/pastel-00711490/document Page 98 3.2 Laboratory pull-out test campaign 3.2.1 Equipment: new experimental bench The tests have been carried out using a new laboratory pull-out bench. The bench principle was defined before the beginning of this thesis; however, the bench was first used and tuned during the current doctorate. General description The new bench has been designed to match the field situation displayed in figure 1.15; accordingly, it is based on the double embedment principle. An overall view and a cutaway section of this bench are shown in figure 3.1. On the other hand, a picture of the experimental facility during a pull-out test is displayed in figure 3.2. -------------------------------------------------- Note added at 1 hr (2019-10-03 20:26:39 GMT) -------------------------------------------------- Грунт и песок для строительных работ. 1 Определение зернового состава и модуля крупности. ГОСТ 8736-2014 ГОСТ 8735-88 ГОСТ 12536-2014 2 Определение плотности грунта (метод режущих колец). ГОСТ 5180-2015 ГОСТ 8735-88 3 Определение насыпной плотности песка. ГОСТ 8735-88 4 Определение влажности песка. ГОСТ 8735-88 5 Определение содержания глины в комках песка. ГОСТ 8735-88 6 Определение содержания пылеватых и глинистых частиц в песке. ГОСТ 8735-88 7 Определение коэффициента уплотнения грунта (экспресс методами). ГОСТ 19912-2012 ГОСТ 8735-88 ТР 73-98 8 Определение влажности грунта. ГОСТ 21718-84 9 Определение максимальной плотности и оптимальной влажности грунта. ГОСТ 22733-2002 10 Определение коэффициента фильтрации песка. ГОСТ 25584-90 3000 -------------------------------------------------- Note added at 1 hr (2019-10-03 20:27:33 GMT) -------------------------------------------------- https://lab-smr.ru/ispitanie-grynta/ http://a-geo.kz/inzhenerno-geologicheskie-izyskaniya-v-kazax... |
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