scholarly journals Detection of beam-end fractures in steel members based on local stiffness calculated by strain response

2021 ◽  
Vol 241 ◽  
pp. 112419
Author(s):  
Jun Iyama ◽  
Yoshihiro Fukushima ◽  
Takashi Hasegawa ◽  
Hiroto Nakagawa ◽  
Yosuke Kaneshiro
Keyword(s):  
Strain Response ◽  
Steel Members ◽  
Local Stiffness

Experimental Characterization of Mechanical Behavior of Cord-Rubber Composites

1982 ◽  
Vol 10 (1) ◽  
pp. 37-54 ◽  
Author(s):  
M. Kumar ◽  
C. W. Bert
Keyword(s):  
Response Characteristic ◽  
Cord Compression ◽  
Complete Characterization ◽  
Strain Response ◽  
Strain Gages ◽  
Experimental Characterization ◽  
Rubber Composites ◽  
Stress Strain ◽  
Strain Data

Abstract Unidirectional cord-rubber specimens in the form of tensile coupons and sandwich beams were used. Using specimens with the cords oriented at 0°, 45°, and 90° to the loading direction and appropriate data reduction, we were able to obtain complete characterization for the in-plane stress-strain response of single-ply, unidirectional cord-rubber composites. All strains were measured by means of liquid mercury strain gages, for which the nonlinear strain response characteristic was obtained by calibration. Stress-strain data were obtained for the cases of both cord tension and cord compression. Materials investigated were aramid-rubber, polyester-rubber, and steel-rubber.

The Influence of Slab Concreting Sequence on a Continuous Composite Girder Bridge

2016 ◽  
Vol 691 ◽  
pp. 96-107
Author(s):  
Tomas J. Zivner ◽  
Rudolf B. Aroch ◽  
Michal M. Fabry
Keyword(s):  
Concrete Slab ◽  
Transverse Cross Section ◽  
Slab Thickness ◽  
Slab Width ◽  
Composite Girder ◽  
Steel Members ◽  
Composite Bridge ◽  
Bridge Girder ◽  
Girder Bridge ◽  
Main Girder

This paper deals with the slab concreting sequence and its influence on a composite steel and concrete continuous highway girder bridge. The bridge has a symmetrical composite two-girder structure with three spans of 60 m, 80 m, 60 m (i.e. a total length between abutments of 200.0 m). The horizontal alignment is straight. The top face of the deck is flat. The bridge is straight. The transverse cross-section of the slab is symmetrical with respect to the axis of the bridge. The total slab width is 12 m. The slab thickness varies from 0.4 m on main girders to 0.25 m at its free edges and 0.3075 m at its axis of symmetry. The center-to-center spacing between main girders is 7 m and the slab cantilever on either side is 2.5 m long. Every main girder has a constant depth of 2800 mm and the thicknesses of the upper and lower flanges are variable. The lower flange is 1200 mm wide whereas the upper flange is 1000 mm wide. The two main girders have transverse bracing at abutments and at internal supports and at regular intervals in every span. The material of concrete slab is C35/45 and of steel members S355. The on-site pouring of the concrete slab segments is performed by casting them in a selected order and is done after the launching of the steel two girder bridge. The paper presents several concreting sequences and their influence on the normal stresses and deflections of the composite bridge girder.

Development of a Visual Monitoring System for Deformation Measuring of Welded Members and its Application

2008 ◽  
Vol 580-582 ◽  
pp. 557-560 ◽  
Author(s):  
J.G. Han ◽  
Kyong Ho Chang ◽  
Gab Chul Jang ◽  
K.K. Hong ◽  
Sam Deok Cho ◽  
...  
Keyword(s):  
Monitoring System ◽  
Three Dimensional ◽  
Measuring Method ◽  
Welding Residual Stress ◽  
Measuring System ◽  
Visual Monitoring ◽  
Test Error ◽  
Steel Members ◽  
Loading Tests ◽  
Visual Monitoring System

Recently, in the loading tests for steel members, the deformation value is measured by calculating a distance of both cross-heads. This measuring method encounters a test error due to various environmental factors, such as initial slip, etc.. Especially, in the case of welded members, the non-uniform deformation behavior in welded joints is observed because of the effect of welding residual stress and weld metal. This is mainly responsible for a test error and a loss of the reliability for used test instruments. Therefore, to improve the accuracy and the applicability of measuring system, it is necessary to employ a visual monitoring system which can accurately measure the local and overall deformation of welded members. In this paper, to accurately measure a deformation of welded members, a visual monitoring system (VMS) was developed by using three-dimensional digital photogrammetry. The VMS was applied to the loading tests of a welded member. The accuracy and the applicability of VMS was verified by comparing to the deformation value measured by a test instrument (MTS-810). The characteristics of the behavior near a welded joint were investigated by using VMS.

Finite element investigation on plate buckling coefficients of tapered steel members web plates

Structures ◽  
2020 ◽  
Vol 28 ◽  
pp. 2321-2334
Author(s):  
Mostafa Mohamed Ibrahim ◽  
Ihab Mohamed El Aghoury ◽  
Sherif Abdel-Basset Ibrahim
Keyword(s):  
Finite Element ◽  
Plate Buckling ◽  
Steel Members ◽  
Web Plates

Large, thermally stabilized and fatigue-resisted piezoelectric strain in textured relaxor-PbTiO3 ferroelectric ceramics

2021 ◽  
Author(s):  
Yunfei Chang ◽  
Jie Wu ◽  
Bin Yang ◽  
Hang Xie ◽  
Shuai Yang ◽  
...  
Keyword(s):  
High Strain ◽  
Ferroelectric Ceramics ◽  
Strain Response ◽  
Output Stability ◽  
Piezoelectric Strain ◽  
Electronic Actuator

Piezoceramics with both high strain response and excellent output stability are strongly demanded for electronic actuator applications. Unfortunately, enhanced strains are generally accompanied by temperature and E-field instabilities for relaxor-PbTiO3...

scholarly journals Fast Hotspot Detection in SFCLs by Exploiting Strain Response in Optical Fiber Sensing

2021 ◽  
pp. 1-1
Author(s):  
Arooj Akbar ◽  
Nicolo' Riva ◽  
Zhisheng Yang ◽  
Luc Thevenaz ◽  
Bertrand Dutoit
Keyword(s):  
Optical Fiber ◽  
Strain Response ◽  
Hotspot Detection ◽  
Fiber Sensing ◽  
Optical Fiber Sensing
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