Results 81 to 90 of about 4,166 (255)

Model-Based Adaptive Iterative Hard Thresholding Compressive Sensing in Sensor Network for Volcanic Earthquake Detection

International Journal of Distributed Sensor Networks, 2015
Recent years have witnessed pilot deployments of inexpensive wireless sensor networks (WSNs) for volcanic eruption detection, where the volcano-seismic signals were collected and processed by sensor nodes.
Guojin Liu, Qian Zhang, Yuyuan Yang, Zhenzhi Yin, Bin Zhu   +4 more
doaj   +1 more source

From a Probabilistic PBEE Framework to Risk‐Targeted Structural Design With Cascading Hazards: Engineering Application for Seismic–Radiological Safety

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT Earthquake‐induced damage of structures can trigger cascading hazards, linking structural performance to nonstructural consequences. In current engineering practice, these two aspects are typically addressed separately, limiting the ability to account for such coupled effects in design.
Matjaž Dolšek, Peter Fajfar, Anže Babič   +2 more
wiley   +1 more source

3D Reverse-Time Migration Imaging for Multiple Cross-Hole Research and Multiple Sensor Settings of Cross-Hole Seismic Exploration

Sensors
The two-dimensional (2D) cross-hole seismic computed tomography (CT) imaging acquisition method has the potential to characterize the target zone optimally compared to surface seismic surveys.
Fei Cheng, Daicheng Peng, Sansheng Yang
doaj   +1 more source

The effects of seismic rotations on inertial sensors

, 2007
With the important increase in the number of instruments, especially in the near field of quite significant earthquakes, unsaturated traces have led seismologists to question what they are really measuring. We have performed a review of previous studies related to the effects of rotations on both horizontal and vertical components of various sensors ...
/Pillet, Robert, Virieux, J.
openaire   +2 more sources

Rocking and Rolling of Rigid Polygons Under Seismic Excitation

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT We present an event driven analytical framework for rigid cyclic polygons subjected to horizontal ground excitation in which uplift, impact, and successive pivot switching are treated within a unified non‐smooth dynamical description. Rolling is defined as a sequence of energetically admissible transitions between neighbouring vertices tied to
Atif Rasheed, Christian Málaga‐Chuquitaype   +1 more
wiley   +1 more source

EXPANDING THE BANDWIDTH OF A SEISMIC SENSOR

Sensor Electronics and Microsystem Technologies, 2018
Технологічне зниження частоти власних коливань інертної маси сейсмічного сенсора нижче 1 Гц призводить до неприпустимого зниження експлуатаційних якостей приладу. У даній роботі показано, що коректуючи передавальну функцію сейсмічного сенсора передавальними функціями типових динамічних ланок, в низькочастотній області амплітудно-частотної ...
openaire   +4 more sources

Analytical Framework for System‐Level Fragility Surfaces of Reinforced Concrete Bridges Under Mainshock‐Aftershock Sequences

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT Conventional single intensity measure (IM) fragility approaches with simplified component dependency assumptions overlook the progressive damage accumulation and evolving inter‐component correlations that govern system behavior under mainshock‐aftershock (MSAS) loading.
Muhammad Rashid, Mayuko Nishio
wiley   +1 more source

Study on the Formation of Seismic Sensors

Journal of the Japan Society of Precision Engineering, 1978
In order to improve the reliability of seismic sensors used in the seismic safety equipments, this paper examines and estimates the influential factors on the frequency characteristics of the mechanical sensors through classifying the approximate equations of their simplified motion and comparing numerical solutions with experiments under the ...
openaire   +2 more sources

Numerical and Experimental Evaluation of a Simplified Lateral Spring Formulation for Rocking Structures

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT Rocking podium isolation systems have gained significant research interest as a method of limiting seismic demands on superstructures and eliminating residual post‐earthquake drifts through self‐centring behaviour. However, while numerous models of varying complexity, including analytical, phenomenological, and physical formulations, have been
Marawan Zaki, Chiyun Zhong, Constantin Christopoulos   +2 more
wiley   +1 more source

Energy‐Based Characterisation of Earthquake Damage in Masonry Infills Through Combined In‐Plane and Out‐of‐Plane Experimental Tests

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT The seismic capacity of structural systems/members is usually defined in terms of deformation thresholds. Although this is effective in many circumstances, disregarding cumulative quantities such as hysteretic energy may be ineffective when low‐cycle fatigue is relevant (e.g., long‐duration ground motions, very soft soils, ground‐motion ...
Roberto Gentile, Giulia Angelucci, Jingren Wu, Marilisa Di Benedetto, Riccardo Milanesi, Giulio Augusto Tropea, Fabrizio Mollaioli, Fatemeh Jalayer, Fabio Freddi, Fabio Di Trapani, Paolo Morandi, Gerard J. O'Reilly   +11 more
wiley   +1 more source