scholarly journals FEM ANALYSIS OF THE LAMINATED RUBBER BEARINGS UNDER TENSILE AND LARGE HORIZONTAL DEFORMATION USING THE HYPERELASTIC CONSTITUTIVE LAW WITH STIFFNESS DEGRADATION DUE TO GENERATION OF VOIDS IN RUBBER

2011 ◽  
Vol 76 (663) ◽  
pp. 917-925
Author(s):  
Takahiro MORI ◽  
Nobuo MUROTA ◽  
Takashi KIKUCHI
Keyword(s):  
Fem Analysis ◽  
Constitutive Law ◽  
Stiffness Degradation ◽  
Horizontal Deformation ◽  
Rubber Bearings

Vertical stiffness degradation of laminated rubber bearings under lateral deformation

2017 ◽  
Vol 152 ◽  
pp. 310-318 ◽  
Author(s):  
Weiguo Yang ◽  
Xinyang Sun ◽  
Meng Wang ◽  
Pei Liu
Keyword(s):  
Stiffness Degradation ◽  
Lateral Deformation ◽  
Vertical Stiffness ◽  
Rubber Bearings

Design of Bitumen Asphalt Belt Sliding Joint Based on Experiment Results

2017 ◽  
Vol 738 ◽  
pp. 185-194
Author(s):  
Pavlina Matečková ◽  
Martina Smirakova ◽  
Jan Kubosek ◽  
Radim Čajka
Keyword(s):  
Underground Mining ◽  
Fem Analysis ◽  
Shear Resistance ◽  
Test Results ◽  
Horizontal Deformation ◽  
Normal Forces ◽  
Sliding Joint ◽  
Undermined Area ◽  
Sliding Joints ◽  
Foundation Structure

Foundation structures are usually exposed to dominant vertical load. However, in some cases there is also significant value of horizontal load caused e.g. by horizontal terrain deformation on areas attached with underground mining or by horizontal deformation of foundation structure due to pre-stressing, creep, shrinkage, and temperature variation. Through the friction between subsoil and foundations, the foundation structure must resist significant normal forces. The idea of sliding joints between subsoil and foundation structure, which eliminates the friction in footing bottom, comes from the 1970’s. The bitumen asphalt belt given rheological properties has been proven as an effective material for sliding joints. In the paper there are test results of shear resistance of currently used asphalt belts. The test results are used for subsoil shear stress analysis in model example of strip foundation. Shear resistance is calculated according to Czech code for designing buildings on undermined area and also using advanced FEM analysis.

Seismic retrofit of a truss bridge in Seto-Ohashi bridges

2021 ◽  
Author(s):  
Takao Kaneda ◽  
Masahiro Nishitani ◽  
Kazuo Endo ◽  
Hiroki Murakami
Keyword(s):  
Performance Evaluation ◽  
Structural Change ◽  
Fem Analysis ◽  
Seismic Retrofit ◽  
Seismic Performance Evaluation ◽  
Running Safety ◽  
Railway Tracks ◽  
Rubber Bearings ◽  
Truss Bridge ◽  
The Impact

<p>This paper reports that isolation rubber bearings were newly installed instead of existing steel bearings as seismic retrofit in a truss portion of the Hitsuishijima viaduct in the Seto-Ohashi Bridges, which is unprecedented method for highway-railway combined bridges in Japan. For the truss bridge, seismic performance evaluation was conducted and it was found that some members were damaged. In order to minimize retrofit work over the railway tracks, the isolation of truss girder was selected. For the truss girder isolation, the constraining effect of the long rail and the running safety of the train were studied. In the retrofit work, in order to minimize the impact on the expressway, railway tracks, and utility facilities, the structural change of the isolation rubber bearings and the displacement of truss girder caused by jacking up had to be studied. The support structure was adopted with a knock-off mechanism, and the effects of jacking up were confirmed by FEM analysis.</p>

Plate Wave Characterization of Stiffness Degradation in Composites During Fatigue

1998 ◽  
Vol 10 (1) ◽  
pp. 147-162
Author(s):  
J. -R. Shih ◽  
A. K. Mai ◽  
M. Vemuri
Keyword(s):  
Stiffness Degradation ◽  
Plate Wave

FEM ANALYSIS FOR A NOVEL CONFIGURATION OF BRUSHLESS DC MOTOR WITHOUT PERMANENT MAGNET

2009 ◽  
Vol PIER 98 ◽  
pp. 407-423 ◽  
Author(s):  
Hassan Moradi ◽  
Ebrahim Afjei ◽  
Faramarz Faghihi
Keyword(s):  
Permanent Magnet ◽  
Fem Analysis ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
Brushless Dc

FEM Analysis of Bridge-Type Cable System

2001 ◽  
Vol 84 (9) ◽  
pp. 20-27 ◽  
Author(s):  
Aleš Nevařil ◽  
Jiří Kytýr
Keyword(s):  
Fem Analysis ◽  
Cable System ◽  
Bridge Type

Mathematical model to predict the characteristics of polarization in dielectric materials: The concept of piezoelectrcity and electrostriction

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Mathematical Model ◽  
Electric Field ◽  
Lead Zirconate Titanate ◽  
Dielectric Material ◽  
Strain Curve ◽  
Dielectric Materials ◽  
Lead Zirconate ◽  
Simulation Software ◽  
Constitutive Law ◽  
Basic Material

Model was developed for the prediction of polarization characteristics in a dielectric material exhibiting piezoelectricity and electrostriction based on mathematical equations and MATLAB computer simulation software. The model was developed based on equations of polarization and piezoelectric constitutive law and the functional coefficient of Lead Zirconate Titanate (PZT) crystal material used was 2.3×10-6 m (thickness), the model further allows the input of basic material and calculation of parameters of applied voltage levels, applied stress, pressure, dielectric material properties and so on, to generate the polarization curve, strain curve and the expected deformation change in the material length charts. The mathematical model revealed that an application of 5 volts across the terminals of a 2.3×10-6 m thick dielectric material (PZT) predicted a 1.95×10-9 m change in length of the material, which indicates piezoelectric properties. Both polarization and electric field curve as well as strain and voltage curve were also generated and the result revealed a linear proportionality of the compared parameters, indicating a resultant increase in the electric field yields higher polarization of the dielectric materials atmosphere.

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