Results 81 to 90 of about 15,218,783 (286)
Deep Underground Science and Engineering, EarlyView.This study presents large‐scale similarity model testing (geometric ratio 3.6) of an innovative multiple‐layered lining system—comprising exterior precast segments, middle self‐compacting concrete, and an interior steel pipe—for high‐pressure (0.75 MPa) water conveyance tunnels.
Ramin Asadi +4 more
wiley +1 more source
Low cycle fatigue tests of reinforced concrete columns and joints built with ribbed reinforcement and plain stirrups [PDF]
, 2012 The majority of existing reinforced concrete (RC) buildings were built prior to the introduction of seismic codes. As observed in various recent earthquakes, due to their lack of structural capacity and ductility such structures are very vulnerable and
Varum, H., Rossetto, T., Borg, R. C.
core
One-dimensional physical reference models for the upper mantle and transition zone: combining seismic and mineral physics constraints [PDF]
One-dimensional seismic reference models are known to be a nonunique solution to global seismic data, hampering an interpretation in terms of physical structure. Here we test the compatibility of the simplest hypothesis of a mantle convecting as a whole,
Giardini, D. +3 more
core +1 more source
Analysis of the dynamic behaviour of the hangingwall beam during a seismic event [PDF]
, 1992 Bibliography: leaves 68-72.In a deep-level gold mine planes of weakness oriented parallel to the reef allow the hangingwall to separate from adjacent rock strata. The hangingwall then acts as a separate beam supporting only its selfweight. Mining-induced
Daehnke, A
core +1 more source
Deep Underground Science and Engineering, EarlyView.This study investigates the damage evolution and failure mechanisms of tunnel lining concrete in active fault zones through uniaxial compression tests integrated with acoustic emission (AE) monitoring. A strong linear correlation is identified between the AE cumulative absolute energy and the total strain energy, providing a reliable energy‐based ...
Shuaida Zhu +4 more
wiley +1 more source
Instrumental intensity as a tool for post-earthquake damage assessment: validation for the strong Vrancea earthquakes of August 1986 and May 1990 [PDF]
The frequency-dependent spectrum based seismic intensity, also called instrumental intensity, is calculated basically from the integration of the square values of spectral acceleration ordinates. The values of the instrumental intensity are calibrated to
Borcia, I. S. +1 more
core
Geomatics, Natural Hazards & RiskAs urbanization accelerates worldwide, critical infrastructure is increasingly concentrated in urban areas, and maintaining existing aging systems is becoming more challenging. At the same time, the risk of seismic events is rising.
Seong Hyun Lim +3 more
doaj +1 more source
Deep Underground Science and Engineering, EarlyView.The graphical abstract presents a structured decision‐support framework for assessing the feasibility of converting depleted oil and gas wells into geothermal energy systems. The left panel illustrates a comprehensive, multi‐stage decision‐making framework progressing from prefeasibility screening and technical–economic analysis to policy alignment ...
Karolina Bieryt +3 more
wiley +1 more source
Dynamic Response Simulation of Lining Structure for Tunnel Portal Section under Seismic Load
Shock and Vibration, 2018 Portal section is the weak link of seismic fortification for tunnel structure. Assuming that seismic wave is the vertical incident elastic plane wave, the plane wave input method for the portal section was discussed in this paper; that is, the wave input
Guoqing Liu +3 more
doaj +1 more source
Deep Underground Science and Engineering, EarlyView.A staged three‐dimensional nonlinear soil–structure interaction (SSI) model is established, in which the initial geostress state, tunnel excavation, lining installation, delayed activation of the internal frame, and subsequent surcharge loading are simulated sequentially.
Xinyu Liu +3 more
wiley +1 more source