scispace - formally typeset
Search or ask a question
Topic

Deflection (engineering)

About: Deflection (engineering) is a research topic. Over the lifetime, 30862 publications have been published within this topic receiving 298849 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: The results of eleven reinforced high-strength concrete beams tested in flexure are presented in this paper, showing that the brittle type off-tailure in over-reinforced concrete beams can be arrested by introducing transverse ties or discrete steel fibers in the compression zone.
Abstract: The results of eleven reinforced high-strength concrete beams tested in flexure are presented. All but one beam was over-reinforced. and the compression zone of the beams was confined with either ties or fibers, or left unconfined. Test results indicate that the brittle type offailure in over-reinforced concrete beams can be arrested by introducing transverse ties or discrete steel fibers in the compression zone. For such a beam, both ultimate strength and ductility can be enhanced by increasing the concrete strength. Ductility also increases with an increase in the volume fraction of confining ties, but up to a certain limit. The stress-strain curves for concrete in compression obtained from the flexural tests are remarkably similar to those generated from uni-axially loaded specimens. The analysis based on the usual flexural theory, but using the stress-strain curves for uni-axially loaded specimens, gives close predictions of the experiment data on moment-curvature relationship and ultimate moment capacity of the beams. Evaluation of the present test data and the results from available literature show that Whitney's rectangular stress block can be used in the strength design of high-strength concrete flexural members.

86 citations

Journal ArticleDOI
TL;DR: In this article, a direct one-step technique to measure the torsional spring constant of cantilevers used for lateral or friction measurements with the atomic force microscope is presented, which simultaneously calibrates the photodiode response to the angular deflection of the cantilever.
Abstract: We present a direct one-step technique to measure the torsional spring constant of cantilevers used for lateral or friction measurements with the atomic force microscope. The method simultaneously calibrates the photodiode response to the angular deflection of the cantilever. It does not rely upon any approximate theory for friction, nor upon any simplified model cantilever geometry or elasticity. The technique is verified by comparison with the calculated spring constant and with an independent measurement of the angle calibration. This nondestructive calibration may be performed with any type of cantilever, and the friction may subsequently be measured with any type of substrate or probe.

86 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of steel fibres on key-parameters influencing the shear response of concrete members, with special emphasis on size effect, was investigated for fiber reinforced concrete (FRC) beams.
Abstract: This paper reports some recent results of an experimental campaign on fibre reinforced concrete (FRC) beams under shear loading tested at the University of Brescia: nine full scale beams, having a height varying from 500 to 1,500 mm, were tested for investigating the effect of steel fibres on key-parameters influencing the shear response of concrete members, with special emphasis on size effect. All tested members contained no conventional shear reinforcement and different amounts of steel fibres: 0, 0.64 or 1 % by volume. Results show that a relatively low volume fraction of fibres can significantly increase bearing capacity and ductility. The latter determines visible deflection and prior warning of impending collapse, which is not possible in plain concrete beams (without transverse reinforcement). The size effect issue is substantially limited. Results were compared against the shear formulation incorporated in the final draft of fib Model Code, which can be considered a valuable analytical model for FRC beams under shear loading, even in the case of the three deepest elements herein tested.

86 citations

Journal ArticleDOI
TL;DR: In this paper, an analytical solution is derived to investigate the seismic response of long tunnels, built in non-homogeneous ground, subjected to sinusoidal shear motions, where the tunnel is excavated in two different soil deposits that have a sharp contact and there is a transition zone through the contact.

86 citations

Journal ArticleDOI
TL;DR: In this article, the static performance of steel-concrete-steel (SCS) sandwich slabs was investigated under centrally applied patch load and a large deflection analysis considering plate membrane action was also proposed to predict the force deflection relation.

86 citations


Network Information
Related Topics (5)
Finite element method
178.6K papers, 3M citations
89% related
Beam (structure)
155.7K papers, 1.4M citations
87% related
Numerical analysis
52.2K papers, 1.2M citations
86% related
Ultimate tensile strength
129.2K papers, 2.1M citations
84% related
Composite number
103.4K papers, 1.2M citations
83% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202247
20211,006
20201,140
20191,262
20181,195
20171,215