Results 51 to 60 of about 8,759 (290)

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

Deep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu, Tao Li, Ruiqi Yuan, Yue Li, Bingni Wu, Bo Liu, Zhengding Deng, Galindo Rubén, Fausto Molina‐Gómez   +8 more
wiley   +1 more source

Performance Evaluation of Seismic Isolation System by Installation Location in Lighthouse Structures

Shock and Vibration, 2018
The purpose of this study is to evaluate the applicability of seismic isolation devices for marine accidents under seismic loads. The lighthouse structure is a very important facility when the ship approaches the port.
Moo-Won Hur, Tae-Won Park
doaj   +1 more source

Seismic analysis and design of tunnels within fault ground: A review

Deep Underground Science and Engineering, EarlyView.
The research methods of seismic response of tunnels within fault ground, including field investigations, analytical solutions, physical experiments, and numerical simulations, and seismic countermeasures are discussed. The present study examines the shortcomings and limitations of the current research and design, and puts forward proposals for future ...
Xingda Wang, Yujing Jiang, Xuepeng Zhang, Yuyong Jiao, Ningbo Li, Xiao Wang, Bo Li   +6 more
wiley   +1 more source

Preliminary analysis of the isolation performance for an anti-overturning and wind resistant high-rise isolation structure with upright horizontal isolation layer top hinged

上海师范大学学报. 自然科学版
By adopting seismic isolation measures, the seismic isolation effect of high-rise structures was often unsatisfactory due to factors such as poor tensile strength of isolation bearings and relatively long natural vibration period of the seismic structure.
ZHAO Shifeng
doaj   +1 more source

Analysis of Seismic Isolation Performance of X-Shaped Rubber Bearings (XRBs)

Buildings, 2022
A detailed analysis of the seismic safety performance of building structures using X-shaped rubber bearings (XRBs) under seismic action at different seismic levels of intensity were carried out in this study.
Di Wu, Jingtian Lin, Yan Xiong
doaj   +1 more source

Thermal‐induced fracture evolution and acoustic signature of Beishan granite: Insights into tensile strength of barrier system for high‐level radioactive waste disposal

Deep Underground Science and Engineering, EarlyView.
The tensile strength of granite, a proposed host for nuclear waste, degrades severely above 400°C. We link this to specific microcracking patterns captured by acoustic emission, establishing a scientific basis for assessing repository safety under thermal load.
Wei Zeng, Shijie Li, Xiaozhao Li, Zhen Huang, Shangtong Yang, Wentao Xu, Biao Wang, Yun Wu   +7 more
wiley   +1 more source

Study on seismic isolation performance of composite foundation based on seismic metamaterial theory under near-fault ground motion

Yantu gongcheng xuebao
Near-fault ground motions exhibit long-period velocity pulses and large-amplitude vertical components, obviously increasing structural damage. A seismic metamaterial composite foundation (SMCF) is proposed and investigated to achieve simultaneous ...
ZHANG Mingkai 1, 3, MENG Sibo 1, LIU Zhongxian 1, 2, 3, SHI Yundong 2, 3
doaj   +1 more source

Enhanced Seismic Protection System for an Emergency Diesel Generator Unit

Energies, 2022
Nuclear power plants are required to maintain operation after an earthquake, leading to a safe shutdown if necessary. In the case of a loss of offsite power, the onsite emergency diesel generator is critical to ensure procedural operations of the nuclear
Ricardo Bustamante, Gilberto Mosqueda, Minkyu Kim   +2 more
doaj   +1 more source

Comparative structural response of two steel bridges constructed 100 years apart

, 2011
This paper presents a comparative numerical analysis of the structural behaviour and seismic performance of two existing steel bridges, the Infiernillo II Bridge and the Pinhao Bridge, one located in Mexico and the other in Portugal. The two bridges have
Aníbal Costa, Delgado, Walter, Varum, Humberto, Jose J. Álvarez, Álvarez, Jose J., Fernandes, Catarina, Jara, Jose M., Humberto Varum, Romain Sousa, Costa, Anibal, Manuel Jara, Jara, Manuel, Jara, José, Álvarez, Jesús, Jose M. Jara, Catarina Fernandes, Sousa, Romain, Walter Delgado   +17 more
core   +1 more source

Climatic drivers prevail in montane and lowland Odonata latitudinal diversity gradients, but human modification erodes lowland patterns

Ecography, EarlyView.
Latitudinal diversity gradients (LDGs) arise from the interplay of historical, ecological, and evolutionary processes, yet these drivers may differ across landforms. Mountains, with steep elevational and climatic gradients, often sustain distinct diversity dynamics compared with adjacent lowlands, where vertical climatic gradients are weak and human ...
Zhenyuan Liu, Bo‐Ping Han, Haomiao Zhang, Ramiro Martín‐Devasa, Jens‐Christian Svenning, Janne Soininen   +5 more
wiley   +1 more source