Simulation of Dynamic Behaviour of RC Bridge with Steel-Laminated Elastomeric Bearings under High-Energy Mining Tremors

In the paper a detailed analysis of dynamic responses of a reinforced concrete bridge with steel-laminated elastomeric bearings to high-energy mining tremors registered in two main regions of mining activity in Poland (i.e. Upper Silesian Coal Basin and Legnica-Glogow Copper District) was presented. The representative time histories of accelerations from both regions were used as ground motion data in calculations of the dynamic response of the structure. The two-coefficient Mooney-Rivlin model was used as a constitutive model for hyperelastic non-linear elastomeric material. It was proved that the dynamic response of the bridge was strongly dependent not only on the level of vibration amplitudes but on the dominant frequency range of the mining shock typical for the mining region as well. Also the height of elastomeric bearings occurred to have considerable influence on the total dynamic response of the bridge. Two heights of bearings were analyzed: 42 mm and 85 mm. The increase of the height of bearings caused the decrease up to 25 % in the maximal principal stresses obtained in the dynamic analysis. The behaviour of elastomeric material in case of bearings 42 mm high occurred to be strongly non-linear, whereas in case of bearings 85 mm high behaviour of elastomeric material remained almost linear.

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Dynamic response of a cable-stayed footbridge to high-energy mining tremors

E3S Web of Conferences ◽

10.1051/e3sconf/201910601022 ◽

2019 ◽

Vol 106 ◽

pp. 01022

Author(s):

Izabela Drygała ◽

Joanna M. Dulinska ◽

Maria Anna Polak ◽

Marek Wazowski

Keyword(s):

Dynamic Response ◽

High Energy ◽

Mining Activity ◽

Dynamic Responses ◽

Fe Model ◽

Coal Basin ◽

Kinematic Excitation ◽

Upper Silesian Coal Basin ◽

Mining Tremors ◽

Standard Software

In this work an analysis of the dynamic response of a cable-stayed footbridge to mining tremors typical for two main regions of mining activity in Poland, i.e. the Legnica-Glogow Copper District (LGCD) and the Upper Silesian Coal Basin (USCB) is presented. For analysis, a 3-D finite element (FE) model of the structure was created in the ABAQUS/Standard software program. As a final result, the dynamic responses of the footbridge to the typical mining tremors were delivered. For this stage, the numerical simulations were conducted with the non-uniform kinematic excitation as well as with the uniform kinematic excitation. Finally, the evaluation of two calculation approaches was also made for the studied structure.

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3D Vs. 2D Modeling of Concrete Gravity Dam Subjected to Mining Tremor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.405-408.2015 ◽

2013 ◽

Vol 405-408 ◽

pp. 2015-2019 ◽

Cited By ~ 2

Author(s):

Joanna M. Dulinska ◽

Anna Galuszka

Keyword(s):

Dynamic Response ◽

Three Dimensional ◽

3D Models ◽

Gravity Dam ◽

Internal Stresses ◽

Concrete Gravity Dam ◽

Principal Stresses ◽

Concrete Gravity Dams ◽

Mining Tremors ◽

2D And 3D

The paper indicates the role of 3D modeling of concrete gravity dams in evaluation of dynamic response of dams to mining tremors which occur in mining activity regions. 2D and 3D models of a concrete gravity dam were prepared in order to compare two-and three-dimensional analysis of the dynamic response of dam to mining shock. Firstly, values of natural frequencies obtained for 2D and 3D models occurred to be very similar, but only the 3D model allowed to predict the dam behaviour under longitudinal kinematic excitation. Secondly, the comparison of the maximal principal stresses obtained for 2D and 3D models indicates that the simplified 2D analysis underestimates the values of dynamic response on about 20 %. Three-dimensional dynamic analysis allows to assess internal stresses resulting from mining shock more precisely, since the amplitudes of ground vibrations during mining tremors are comparable in three directions.

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3D vs. 2D Modeling of Concrete Gravity Dam Subjected to Mining Tremor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.325-326.1324 ◽

2013 ◽

Vol 325-326 ◽

pp. 1324-1328 ◽

Cited By ~ 1

Author(s):

Joanna Dulinska

Keyword(s):

Dynamic Response ◽

Three Dimensional ◽

3D Models ◽

Gravity Dam ◽

Internal Stresses ◽

Concrete Gravity Dam ◽

Principal Stresses ◽

Concrete Gravity Dams ◽

Mining Tremors ◽

2D And 3D

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Dynamic response of masonry minarets strengthened with Fiber Reinforced Polymer (FRP) composites

Natural Hazards and Earth System Science ◽

10.5194/nhess-11-2011-2011 ◽

2011 ◽

Vol 11 (7) ◽

pp. 2011-2019 ◽

Cited By ~ 12

Author(s):

A. C. Altunişik

Keyword(s):

Dynamic Response ◽

Cylindrical Body ◽

Element Model ◽

Dynamic Responses ◽

Principal Stresses ◽

Engineering Structures ◽

Frp Composites ◽

Frp Composite ◽

Before And After ◽

Historical Masonry

Abstract. Engineering structures strengthened with FRP composites are gaining popularity, and there is a growing need to understand and compare the behavior of these structures before/after FRP composite strengthening. In this paper, it is aimed to determine the dynamic response of masonry minarets before/after FRP composite strengthening. An Iskenderpaşa historical masonry minaret dating back to XVI century with a height of 21 m located in Trabzon, Turkey was selected as an application. Firstly, 3-D finite element model of the minaret was constituted using ANSYS software. Then, an analytical model of the minaret was analyzed using the 1992 Erzincan earthquake record, which occurred near the area, to determine the dynamic behavior. After this, the cylindrical body of the minaret was strengthened with FRP composite using different configurations and dynamic analyses were performed. Finally, dynamic responses of the minaret before and after FRP composite strengthening, such as displacements and maximum-minimum principal stresses, were compared. At the end of the study, it is seen that displacements had increased along the height of the minaret, maximum and minimum principal stresses occur at the region of transition segment and cylindrical body for all analyses. Also, it is seen from the earthquake analyses that FRP strengthening is very effective on the dynamic responses of the minaret.

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Non-linear Terahertz driving of plasma waves in layered cuprates

Nature Communications ◽

10.1038/s41467-021-21041-6 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Francesco Gabriele ◽

Mattia Udina ◽

Lara Benfatto

Keyword(s):

Low Frequency ◽

Plasma Waves ◽

Meissner Effect ◽

High Energy ◽

Plasma Mode ◽

Light Pulses ◽

High Frequency Plasma ◽

Non Linear ◽

Out Of Plane ◽

Layered Cuprates

AbstractThe hallmark of superconductivity is the rigidity of the quantum-mechanical phase of electrons, responsible for superfluid behavior and Meissner effect. The strength of the phase stiffness is set by the Josephson coupling, which is strongly anisotropic in layered cuprates. So far, THz light pulses have been used to achieve non-linear control of the out-of-plane Josephson plasma mode, whose frequency lies in the THz range. However, the high-energy in-plane plasma mode has been considered insensitive to THz pumping. Here, we show that THz driving of both low-frequency and high-frequency plasma waves is possible via a general two-plasmon excitation mechanism. The anisotropy of the Josephson couplings leads to markedly different thermal effects for the out-of-plane and in-plane response, linking in both cases the emergence of non-linear photonics across Tc to the superfluid stiffness. Our results show that THz light pulses represent a preferential knob to selectively drive phase excitations in unconventional superconductors.

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Non-linear seismic dynamic response of curved steel bridges equipped with LRB supports

Steel Construction ◽

10.1002/stco.201010005 ◽

2010 ◽

Vol 3 (1) ◽

pp. 34-41 ◽

Cited By ~ 5

Author(s):

Carlos Mendez Galindo ◽

Javier Gil Belda ◽

Toshiro Hayashikawa

Keyword(s):

Dynamic Response ◽

Steel Bridges ◽

Non Linear ◽

Curved Steel

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3-D elastic coupling vibration and acoustical radiation characteristics of cracked gear under elastic support condition

Journal of Vibration and Control ◽

10.1177/1077546315596482 ◽

2015 ◽

Vol 23 (9) ◽

pp. 1548-1568 ◽

Cited By ~ 1

Author(s):

Shao Renping ◽

Purong Jia ◽

Xiankun Qi

Keyword(s):

Dynamic Response ◽

Support System ◽

Three Dimensional ◽

Elastic Support ◽

Dynamic Responses ◽

Tooth Root ◽

Support Condition ◽

Elastic Boundary ◽

Root Crack ◽

Elastic Disc

According to the actual working condition of the gear, the supporting gear shaft is treated as an elastic support. Its impact on the gear body vibration is considered and investigated and the dynamic response of elastic teeth and gear body is analyzed. On this basis, the gear body is considered as a three-dimensional elastic disc and the gear teeth are treated as an elastic cantilever beam. Under the conditions of the elastic boundary (support shaft), combining to the elastic disk and elastic teeth, the influence of three-dimensional elastic discs on the meshing tooth response under an elastic boundary condition is also included. A dynamic model of the gear support system and calculated model of the gear tooth response are then established. The inherent characteristics of the gear support system and dynamics response of the meshing tooth are presented and simulated. It was shown by the results that it is correct to use the elastic support condition to analyze the gear support system. Based on the above three-dimensional elastic dynamics analysis, this paper set up a dynamics coupling model of a cracked gear structure support system that considered the influence of a three-dimensional elastic disc on a cracked meshing tooth under elastic conditions. It discusses the dynamic characteristic of the cracked gear structure system and coupling dynamic response of the meshing tooth, offering a three-dimensional elastic body model of the tooth root crack and pitch circle crack with different sizes, conducting the three-dimensional elastic dynamic analysis to the faulty crack. ANSYS was employed to carry out dynamic responses, as well as to simulate the acoustic field radiation orientation of a three-dimensional elastic crack body at the tooth root crack and pitch circle with different sizes.

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Evaluation of the Dynamic-Response-Based Intact Stability Criterion for Floating Wind Turbines

Volume 9: Ocean Renewable Energy ◽

10.1115/omae2015-42008 ◽

2015 ◽

Cited By ~ 1

Author(s):

Marco Masciola ◽

Xiaohong Chen ◽

Qing Yu

Keyword(s):

Wind Speed ◽

Dynamic Response ◽

Wind Turbines ◽

Stability Criterion ◽

Area Ratio ◽

Operating Conditions ◽

Dynamic Responses ◽

Stability Criteria ◽

Intact Stability ◽

Overturning Moment

As an alternative to the conventional intact stability criterion for floating offshore structures, known as the area-ratio-based criterion, the dynamic-response-based intact stability criteria was initially developed in the 1980s for column-stabilized drilling units and later extended to the design of floating production installations (FPIs). Both the area-ratio-based and dynamic-response-based intact stability criteria have recently been adopted for floating offshore wind turbines (FOWTs). In the traditional area-ratio-based criterion, the stability calculation is quasi-static in nature, with the contribution from external forces other than steady wind loads and FOWT dynamic responses captured through a safety factor. Furthermore, the peak wind overturning moment of FOWTs may not coincide with the extreme storm wind speed normally prescribed in the area-ratio-based criterion, but rather at the much smaller rated wind speed in the power production mode. With these two factors considered, the dynamic-response-based intact stability criterion is desirable for FOWTs to account for their unique dynamic responses and the impact of various operating conditions. This paper demonstrates the implementation of a FOWT intact stability assessment using the dynamic-response-based criterion. Performance-based criteria require observed behavior or quantifiable metrics as input for the method to be applied. This is demonstrated by defining the governing load cases for two conceptual FOWT semisubmersible designs at two sites. This work introduces benchmarks comparing the area-ratio-based and dynamic-response-based criteria, gaps with current methodologies, and frontier areas related to the wind overturning moment definition.

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