Results 71 to 80 of about 20,919 (268)

Study on the composite fracture characteristics of filling and reinforcing cracked rock mass after high temperature damage

Deep Underground Science and Engineering, EarlyView.
Cement infill shares compressive and shear stresses during loading, while interfacial friction hinders crack propagation and reduces stress concentration, improving the rock's load‐bearing capacity. Failure modes vary with crack inclination. Unfilled specimens show four modes.
Shihao Yuan, Qiang Sun, Jianjun Hu, Liwei Zhang, Jishi Geng   +4 more
wiley   +1 more source

Modeling and experimental validation of bolt–grout bond–slip behavior for deep underground excavation support

Deep Underground Science and Engineering, EarlyView.
A novel shear‐lag model, validated by pull‐out tests, incorporates a constant bond stress stage to predict the complete load–displacement response of grouted rock bolts, providing a new tool for optimizing anchorage length and material toughness in deep underground engineering. Abstract The stability of rock masses in deep underground excavations, such
Wenhui Bian, Xiaohui He, Kexue Wang, Yufei Wu, Guoxin Wang, Shaochen Zhang, Jun Yang   +6 more
wiley   +1 more source

Multicriteria assessment of the response capability of urban emergency shelters: A case study in Beijing

Natural Hazards Research
Urban emergency shelters are pivotal for safety, with effective evaluation criteria enabling decision-makers to identify strengths and weaknesses, facilitating targeted enhancements.
Yiting Xu, Wei Wang, Hong Chen, Minhao Qu   +3 more
doaj   +1 more source

Numerical analysis of earthquake response of multistage high slopes reinforced by frame structure with pre-stressed anchors

Yantu gongcheng xuebao, 2018
Based on the actual project and the Geostudio analysis software, the dynamic analysis model for a multistage high slope reinforced by frame structure with pre-stressed anchors is established.
YE Shuai-hua 1, 2, 3, SHI Yi-lei 1, 2, GONG Xiao-nan 3, CHEN Chang-liu 4
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

An Improved Parrot Optimization Algorithm Applied to Engineering Optimization Problems

Mathematics
Metaheuristic algorithms have become effective tools for solving complex engineering optimization problems. The Parrot Optimization (PO) algorithm is a recently proposed method with promising performance; however, it still suffers from premature ...
Yueqiao Yang, Mingyuan Li, Minhao Qu, Yang Gao, Liang Zhao, Boni Du   +5 more
doaj   +1 more source

Review of researches on seismic response of close underground crossing structures

Yantu gongcheng xuebao, 2019
In view of the design and use requirements, a large number of close underground crossing projects have emerged, forming a complex interaction system between soil-crossing structural groups. When a number of underground structures are close to each other,
WANG Guo-bo 1,2, PENG Xiang-jun 1, HAO Peng-fei 1, WEI Hao-hao 1
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

Theoretical Analysis Model of a New Post-Tensioned, Unbonded, Prestressed Beam–Column Connection

Buildings
To investigate the mechanical properties of a new post-tensioned, unbonded, prestressed beam–column connection—including its hysteresis behavior and energy dissipation capacity—a theoretical analysis was conducted.
Hu Qi, Jie Qin, Wenxuan Zhang, Mengke Zhang   +3 more
doaj   +1 more source