Results 71 to 80 of about 27,908 (298)

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

Innovative Seismic Response-Controlled System with Shear Wall and Concentrated Dampers in Lower Stories

Frontiers in Built Environment, 2017
A new structural control system using damper-installed shear walls in lower stories with reduced stiffness is proposed for vibration control of high-rise RC buildings. That system has some design variables, i.e., height of shear wall, degree of stiffness
Tsubasa Tani, Tsubasa Tani, Ryota Maseki, Izuru Takewaki   +3 more
doaj   +1 more source

Investigation of the failure characteristics of fissure tunnels under dynamic and static combinations

Deep Underground Science and Engineering, EarlyView.
This article aims to investigate the dynamic fracture response of fractured tunnel models under zero geological stress through physical experiments and numerical simulations. It further simulates the dynamic fracture characteristics of fractured tunnel models under geological stress ranging from 0 to 2.5 MPa using the numerical software AUTODYN ...
Peng Ying, Yu Ying, Xiaohan Li, Han Zhao, Kewei Yu, Zheming Zhu, Lei Zhou, Xibin Li   +7 more
wiley   +1 more source

Critical Steady-State Response of Single-Degree-of-Freedom Bilinear Hysteretic System under Multi Impulse as Substitute of Long-Duration Ground Motion

Frontiers in Built Environment, 2017
A set of multiple impulses is introduced as a substitute of many-cycle harmonic waves which represent the long-duration earthquake ground motion. A closed-form expression is derived of the elastic–plastic response of a single-degree-of-freedom structure ...
Kotaro Kojima, Izuru Takewaki
doaj   +1 more source

Effect of confining pressure on fracture characteristics and mineralogical behavior of tight sandstone specimens after hydraulic fracturing

Deep Underground Science and Engineering, EarlyView.
Hydraulic fracturing in tight sandstone and fracture propagation characteristics using backscattered electron‐scanning electron microscope (BSE‐SEM) images. Abstract This study focuses on hydraulic fracturing experiments conducted under triaxial conditions on tight sandstone specimens from Shivpuri district, Madhya Pradesh, India.
Pankaj Rawat, Narendra Kumar Samadhiya
wiley   +1 more source

A Refined Multi-Spring Model for Prestressed Precast Concrete Connections

Buildings
Precast concrete with a moment-resisting frame with hybrid beam–column connections (HBC), which is featured by inelastic deformation induced by opening and closing of the interface between precast beam and column, has been emphasized in recent years ...
Hu Qi, Jie Qin, Mengke Zhang, Zhonghao Zhang   +3 more
doaj   +1 more source

Optimal Viscous Damper Placement for Elastic-Plastic MDOF Structures Under Critical Double Impulse

Frontiers in Built Environment, 2019
A new method for optimal viscous damper placement is proposed for elastic-plastic multi-degree-of-freedom (MDOF) structures subjected to the critical double impulse as a representative of near-fault ground motions.
Hiroki Akehashi, Izuru Takewaki
doaj   +1 more source

Post-traumatic stress disorder in medical workers involved in earthquake response: A systematic review and meta-analysis. [PDF]

Heliyon, 2023
Tahernejad S, Ghaffari S, Ariza-Montes A, Wesemann U, Farahmandnia H, Sahebi A.   +5 more
europepmc   +1 more source

Optimization of cut‐hole layout under high in situ stress based on numerical simulation and field tests

Deep Underground Science and Engineering, EarlyView.
This study investigates the blast‐induced rock damage patterns under different cut‐hole layouts and ground stress conditions through numerical simulations and field tests. The findings in this study provide valuable insights for similar underground engineering applications.
Junjie Zhao, Diyuan Li, P. G. Ranjith, Xinxin Lü, Yanliang Li, Xiaoli Su   +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