Results 21 to 30 of about 199,997 (276)
Frontiers in Materials, 2022 The arch is a common structural form in bridge engineering; its collapse is often caused by instability. In this article, in-plane nonlinear instability of pin-ended functionally graded material (FGM) arches with two cross-sectional types under local ...
Jinman Zhou +5 more
doaj +1 more source
ESPOCH Congresses: The Ecuadorian Journal of S.T.E.A.M.The characterization of rock material in mining projects is important, specifically with respect to compressive strength, since this parameter establishes safety factors for slopes in quarries and/or fortification systems for tunnels. This work proposes a simple and practical application methodology.
Feijoo, Ernesto
openaire +3 more sources
Shock and Vibration, 2022 Point load test is a simple and fast method to obtain the compressive strength of rock. According to the maximum load at failure and the distance between two cone ends, the compressive strength of specimens can be calculated by the empirical formula ...
Ming Zhou +4 more
doaj +1 more source
Analysis of failure behaviour of the anisotropic rocks in the point load index test
IOP Conference Series: Earth and Environmental Science, 2021 Abstract The strength and deformational behaviour of rocks under loading conditions are important in underground excavations, mining and every civil engineering constructions as it determines the stability of such structures. This study aims to augment the existing know-how on such behaviour through analysis of point load tests conducted
D Acharya +3 more
openaire +1 more source
Journal of Engineering and Applied Science, 2023 Lubricating approaches involving nanoparticles have a significant role in reducing friction and wear. Reducing friction is crucial for preserving energy, minimizing emissions, and protecting the environment.
Trishul Kulkarni +4 more
doaj +1 more source
PREDICTION OF UNCONFINED COMPRESSIVE STRENGTH OF ROCKS BY POINT LOAD STRENGTH INDEX [PDF]
Journal of Al-Azhar University Engineering Sector, 2019 The point load testing is widely used to determine rock strength indeces in geotechnicalpractices as a result to simplicity. The present study presents correlation equations betweenthe unconfined compressive strength (qu) and point load strength index Is(50) adopted fordifferent types of rocks.
Mohamed mohamed +2 more
openaire +1 more source
Energies, 2018 Based on the equilibrium point equations of a classic three-node system integrated with a large-scale photovoltaic cell (PV) power plant, the impact of PV output fluctuation on the saddle-node bifurcation (SNB) was derived and analyzed. When PV runs in a
Sheng Li, Zhinong Wei, Yanan Ma
doaj +1 more source
A new index combining weak layer and slab properties for snow instability prediction [PDF]
Natural Hazards and Earth System Sciences, 2015 Snow slope stability evaluation requires considering weak layer as well as slab properties – and in particular their interaction. We developed a stability index from snow micro-penetrometer (SMP) measurements and compared it to 129 concurrent point ...
J. Schweizer, B. Reuter
doaj +1 more source
Tikrit Journal of Pure Science, 2023 Geotechnical study conducted upon 10 rock samples have been taken from outcroup of Mukdadiya Formation (Lower Bakhtiari) which are located in Kirkuk anticline.
Burkan S. Othman, Dahir K. ALI
doaj +1 more source
Load and resistance factors for prestressed concrete girder bridges
Budownictwo i Architektura, 2020 There has been a considerable progress in the reliability-based code development procedures. The load and resistance factors in the AASHTO bridge design code were determined using the statistical parameters from the 1970's and early 1980’s.
Andrzej S. Nowak, Olga Iatsko
doaj +1 more source