Results 81 to 90 of about 5,369 (265)

STUDY ON A508 STEEL CONSTRAINT RELATED FRACTURE TOUGHNESS OF NUCLEAR POWER MAIN PIPELINE UNDER DIFFERENT VERTICAL EARTHQUAKE LOADS

Jixie qiangdu
Considering cracks of various length and depth (various constraints) on the nuclear power main pipeline as the research object, through the mass acceleration application method, applying vertical load of 5 earthquake intensities and 3 real earthquakes to
YANG Jie, YUAN Hongwei, GUO Guoliang, CUI Wei, CHEN Haofeng   +4 more
doaj  

Quantifying the Earthquake Risk to the Electric Power Transmission System in Los Angeles at the Census Tract Level

IEEE Access
This paper develops a probabilistic earthquake risk assessment for the electric power transmission system in the City of Los Angeles. Via a dc load flow analysis of a suite of damage scenarios that reflect the seismic risk in Los Angeles, we develop a ...
Boyu Cheng, Linda Nozick, Ian Dobson, Rachel Davidson, Denis Obiang, Jose Dias, Michael Granados   +6 more
doaj   +1 more source

Analytical stress solution framework for lined compressed air energy storage chambers and its application to safe burial depth determination and supporting effectiveness evaluation

Deep Underground Science and Engineering, EarlyView.
An analytical framework delivers a closed‐form stress solution for lined compressed air energy storage chambers, enabling the determination of the minimum safe burial depth. The solution quantitatively evaluates lining support effectiveness, offering a reliable tool for chamber design and optimization.
Zeyuan Sun, Cheng Zhao, Jinquan Xing, Qinyuan Luo   +3 more
wiley   +1 more source

INFLUENCE AND COMPARISON OF VERTICAL AND HORIZONTAL EARTHQUAKE LOADS ON THE CRACK TIP STRAIN FIELD OF A 1.5 MW WIND TURBINE TOWER

Jixie qiangdu
Taking a 1.5 MW wind turbine tower with different initial crack lengths as the research object, vertical and horizontal earthquake loads with four earthquake intensities and three actual earthquakes were applied, respectively.
YANG Jie, YUAN Hongwei, GUO Guoliang, CUI Wei, CHEN Haofeng   +4 more
doaj  

Advancing mine pillar design: Evaluating traditional methods and integrating AI for enhanced stability of pillars in the Great Dyke, Zimbabwe

Deep Underground Science and Engineering, EarlyView.
B1 is bord width 1, B2 is bord width 2, L is the pillar length, W is the pillar width, red color and letter A represent the pillars, and white color and number 1 represent excavated areas. Pstress is the average pillar stress; σv is the vertical component of the virgin stress, MPa; and e is the areal extraction ratio. e = B o B o + B P ${\rm{e}}=\frac{{
Tawanda Zvarivadza, Hendrik Grobler, Peter Apata Olubambi, Moshood Onifade, Manoj Khandelwal   +4 more
wiley   +1 more source

The effects of reinforced concrete shear wall on the earthquake behaviour of the buildings with various column sections

Journal of Asian Architecture and Building Engineering
The drifts in the buildings vary depending on the stiffness, height and elasticity modules of the load-bearing elements. In this study, a five-storey reinforced concrete building model was designed as an example by using five different column sections ...
Tuncay Kap
doaj   +1 more source

Fracture evolution of a thick soft protection layer and the water inrush mechanism in overburden under longwall mining

Deep Underground Science and Engineering, EarlyView.
Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu, Wei Qiao, Xianggang Cheng, Xiangsheng Meng, Peichao Feng   +4 more
wiley   +1 more source

Shock wave propagation characteristics of aluminum‐containing explosive in corrugated steel‐lined tunnel

Deep Underground Science and Engineering, EarlyView.
Aluminum‐enhanced afterburning renders AE explosives more hazardous than conventional ones. Corrugated steel linings reduce far‐field AE blast overpressure by ~50% through wave reflection and dissipation. The developed model accurately predicts peak pressure (<10% error) and arrival time (<3% error), supporting protective design.
Zhen Wang, Jiayu Peng, Hujun Li, Yuguo Ji, Shuobiao Li, Guokai Zhang   +5 more
wiley   +1 more source

Mechanistic insights across curing regimes for enzymatic and biopolymer‐optimized reinforcement in rock masses

Deep Underground Science and Engineering, EarlyView.
This study examines the effects of curing temperature on the mechanical behavior of underground rock masses treated with enzyme‐induced calcite precipitation (EICP) and an innovative biopolymer‐modified EICP (BP‐EICP). Abstract Biocementation is an innovative and sustainable technique for reinforcing weak and weathered rock masses in natural and ...
Mary C. Ngoma, Oladoyin Kolawole
wiley   +1 more source

Research on Three-Levels Fortification Load Under the Influence of Earthquake and Rainfall

工程科学与技术
ObjectiveSubgrade structures in southwestern China are frequently subject to the combined effects of earthquake and rainfall during their service period.
QIAO Shifan, ZHANG Zhe, CHEN Daolong, ZHAO Fuchen, MENG Fei   +4 more
doaj