Results 41 to 50 of about 4,515 (262)

Exploring wave propagation behaviors in rock: A grain‐based perspective on mineral structures

Deep Underground Science and Engineering, EarlyView.
This study investigates wave propagation in rock at the grain scale using a grain‐based model, revealing that mineral elastic modulus significantly influences wave attenuation while grain size and distribution have limited effects. A novel peak particle velocity attenuation prediction model is proposed and validated for grain‐scale wave propagation ...
Zhiyi Liao, Jiachen Xu, Kai Zhang, Changtai Zhou   +3 more
wiley   +1 more source

An optimizing microseismic method for rock burst early warning based on mining production process

Deep Underground Science and Engineering, EarlyView.
A classification early warning method of rock burst based on hourly microseismic data is proposed, which can be combined with the on‐site production process to provide more timely warning. Abstract Microseismic (MS) events have been reported in nearly every coal mining country, which could well lead to rock burst in underground coal mines.
Zepeng Han, Linming Dou, Wu Cai, Mingbo Chi, Guojun Xi, Shuai Chen, Biao Jiao   +6 more
wiley   +1 more source

Semi‐analytical solution for the stability of deep vertical shaft considering time‐dependent rock‐structure interaction

Deep Underground Science and Engineering, EarlyView.
A novel cavity contraction solution and multilayer shaft wall model were developed to analyze deep shaft stability, considering rock viscosity, support structures, and water pressure, with successful validation through a Hulusu Coal Mine case study.
Bin Chen, Pinqiang Mo, Zhao Lu, Lianfei Kuang, Qiang Zhang, Abolfazl Eslami   +5 more
wiley   +1 more source

Influence of damage degree of recycled coarse aggregate concrete-filled steel tube columns strengthened with envelope steel jacket under seismic load

Journal of Asian Architecture and Building Engineering
In order to discuss the influence of damage degree of recycled coarse aggregate concrete-filled steel tube columns strengthened with envelope steel jacket (ESJ) under seismic load, eight columns were designed and manufactured to simulate seismic loading,
Changwen Zhou, Chengxiang Xu, Yunfei Han, Heng Zhou, Sheng Peng, Jialiang Liu, Tianlei Wang   +6 more
doaj   +1 more source

Design and analysis of a three-dimensional seismic isolation device for small modular reactor building

Nuclear Engineering and Technology
Seismic isolation in nuclear power plant (NPP) buildings has been infrequently applied using a rubber-based horizontal seismic isolation system (SIS) without vertical isolation under a peak ground acceleration (PGA) of 0.3 g as the seismic design ...
Jae-Hong Kim, Jung-Dae Son, Yun-Ho Shin, Dae-Seung Cho   +3 more
doaj   +1 more source

Research and development of three-dimensional isolation system for SFR (Experimental study on static characteristics using half scale size model)

Nihon Kikai Gakkai ronbunshu, 2023
The seismic resistance of nuclear power plants, particularly those using Sodium-Cooled Fast Reactor (SFR) design, is of crucial significance. This paper presents an innovative three-dimensional seismic isolation system developed to address the inherent ...
Tsuyoshi FUKASAWA, Tomoyuki HIRAYAMA, Shinobu YOKOI, Akihiko HIROTA, Takahiro SOMAKI, Masaki YUKAWA, Takayuki MIYAGAWA, Masato UCHITA, Tomohiko YAMAMOTO, Masashi MIYAZAKI, Tomoyoshi WATAKABE, Shigeki OKAMURA, Satoshi FUJITA   +12 more
doaj   +1 more source

Optimized design of steel structures under seismic loading [PDF]

, 2021
Στην παρούσα διδακτορική διατριβή εξετάστηκε η μέθοδος της Προσαυξητικής Δυναμικής Ανάλυσης (ΠΔΑ) ως προς την ακρίβειά της και έπειτα με την βοήθεια ενός αλγόριθμου βελτιστοποίησης χρησιμοποιήθηκε για τον βέλτιστο σχεδιασμό κτηρίων από χάλυβα. Η μέθοδος της Προσαυξητικής Δυναμική Ανάλυσης περιλαμβάνει μια σειρά από μη-γραμμικές δυναμικές αναλύσεις που ...
openaire   +1 more source

Numerical and experimental study on P‐wave propagation across a rock joint with different orientations

Deep Underground Science and Engineering, EarlyView.
Joint orientation significantly affects P‐wave velocity, with the highest velocity at zero‐degree angles, decreasing to 30° as the angle increases. The velocity increases slightly from 30 to 45 degrees but sharply decreases from 45 to 90 degrees. Abstract Determination of the required parameters in different science contexts using the ultrasonic wave ...
Yaghoob Zarei, Mojtaba D. fallahi, Ali Uromeihy, Mohammad R. Nikoodel, Mohammad Fathollahy   +4 more
wiley   +1 more source

Seismic response of benchmark high-speed rail (HSR) round-ended rectangular-shaped cross-section solid (RERSCSS) concrete pier based on the shaking table tests

Scientific Reports, 2022
High-speed rail (HSR) has recently expanded its networks globally, but its 350 km/h bridges have not yet been tested for high-level earthquakes. This study tests the typical HSR bridge on a shaking table to assess the seismic performance in high-level ...
Lingun Chen, Lizhong Jiang, Xin Kang, Xiaolun Hu, Xiaoming Huang, Liang Xu, Linlin Sun, Lu Wang, Yuan Tian, Chencheng Zhai   +9 more
doaj   +1 more source

Instability mechanism and failure characteristics of underground cavern in block system under the action of seismic waves

Deep Underground Science and Engineering, EarlyView.
Seismic waves with tensile stress, high amplitude, and low frequency are most likely to trigger block instability and sliding. Blocks with a single sliding surface are more prone to movement than those with multiple constraints, and roof‐positioned blocks are especially vulnerable to slide.
Xiao Wang, Jinxiao Liu, Gaoshuo Zhang, Wenxin Li, Changdi He   +4 more
wiley   +1 more source