scholarly journals Flexural Behavior of Posttensioned Flat Plates Depending on Tendon Layout

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Min Sook Kim ◽  
Young Hak Lee
Keyword(s):  
Maximum Load ◽  
Flexural Behavior ◽  
Test Results ◽  
Flat Plates ◽  
Yield Line ◽  
Yield Line Theory ◽  
Posttensioned Concrete ◽  
Line Theory ◽  
Line Analysis ◽  
Good Agreement

This paper discusses the experimental results on the flexural behavior and deflections of posttensioned concrete flat plates depending on tendon layout. One reinforced concrete flat plate and two posttensioned concrete flat plates were manufactured and tested. One-way posttensioning layout and two-way posttensioning layout were considered in this paper. The load-deflection behavior and modes of crack are presented from the test results. Posttension systems effectively controlled crack and deflection. One-way and two-way posttensioning layouts both showed similar maximum load. However, serviceability improved with two-way posttensioning layout compared to one-way posttensioning layout. Also, the yield-line theory was applied to predict the ultimate load for the posttensioned flat plates. The comparison between the test results and estimation by yield-line analysis generally showed good agreement.

Limit Analysis and Yield-Line Theory

1968 ◽  
Vol 35 (2) ◽  
pp. 357-362 ◽  
Author(s):  
Antoni Sawczuk ◽  
P. G. Hodge
Keyword(s):  
Limit Analysis ◽  
Single Point ◽  
Point Load ◽  
Simply Supported ◽  
Yield Line ◽  
Yield Line Theory ◽  
Line Theory ◽  
The Relationship ◽  
Line Analysis ◽  
General Method

The relationship between limit analysis and yield-line analysis is investigated. Attention is restricted to simply supported, isotropic slabs subjected to single-point loadings. It is found that conventional yield-line analyses quite often give substantial overestimates of the carrying capacity. A general method is formulated for finding the yield-point load, and various examples are considered.

Ultimate loads of orthotropic bridges continuous over isolated interior supports

1985 ◽  
Vol 12 (3) ◽  
pp. 547-558 ◽  
Author(s):  
John B. Kennedy ◽  
Ibrahim S. El-Sebakhy
Keyword(s):  
Prestressed Concrete ◽  
Structural Engineering ◽  
Ultimate Load ◽  
Test Results ◽  
Yield Line ◽  
Yield Line Theory ◽  
Truck Loading ◽  
Line Theory ◽  
Prestressed Concrete Bridge ◽  
Bridge Models

The collapse loads of orthotropic bridges continuous over isolated interior column supports are predicted by means of the yield-line theory. Equations for the collapse loads are derived for bridges of skew and rectangular planforms, and for an arbitrary angle of inclination of the line joining the centres of the interior columns. The analytical results are verified by experimental test results from prestressed concrete bridge models. Uniformly distributed and concentrated loads as well as Ontario Highway Bridge Design truck loading can be accommodated. A design example illustrating the use of the derived equations is presented. Key words: bridges (orthotropic), isolated supports, model tests, skew, structural engineering, ultimate load.

Strength analysis of RHS double chord joints with separated chords

1985 ◽  
Vol 12 (2) ◽  
pp. 370-381 ◽  
Author(s):  
R. M. Korol ◽  
H. S. Mitri
Keyword(s):  
Strength Analysis ◽  
Failure Model ◽  
Hollow Section ◽  
Geometrical Properties ◽  
Yield Line ◽  
Yield Line Theory ◽  
Plastic Strength ◽  
Theory Of Plates ◽  
Line Theory ◽  
Good Agreement

A plastic failure model that is based on the yield line theory of plates is developed to provide a means for predicting the plastic strength of double chord RHS K-joints with separated chords. The model accounts for both localized bending of the chord face and shearing of its inner and outer walls in the gap between the mated diagonals.The results of a series of 24 tests conducted on RHS twin shear beams are reported. Predictions of joint strength were compared with experimental results and were found to be generally in good agreement for both the RHS twin shear beams and isolated K-joint specimens of square hollow section from previous work. A study on the effect that varying the geometrical properties of the joint has on its strength is also presented. Key words: experiments, K-joints, mechanism, plastic analysis, rectangular hollow sections, steel, yield lines.

Computer-Aided Plastic Limit Analysis of Plates

2016 ◽  
Vol 821 ◽  
pp. 547-554
Author(s):  
Vladimír Vančík ◽  
Milan Jirásek
Keyword(s):  
Degrees Of Freedom ◽  
Optimized Design ◽  
Plastic Limit ◽  
Multiple Degrees Of Freedom ◽  
Yield Line ◽  
Yield Line Theory ◽  
Plastic Limit Analysis ◽  
Line Theory ◽  
Primary Focus ◽  
Line Analysis

This article reports on a new tool for optimized design of reinforced concrete plates based on the yield-line theory. The primary focus is on the development of a computer program which can analyze arbitrary yield-line systems with one degree of freedom. The program includes a GUI for quick and intuitive input, and automatically performs analysis of yield-line systems regardless of the complexity of their analytical solution. Furthermore, optimization of orthotropic reinforcement is implemented. The possibility of yield-line analysis of systems with multiple degrees of freedom by linear programming is examined.

scholarly journals Automatic yield-line analysis of slabs using discontinuity layout optimization

2014 ◽  
Vol 470 (2168) ◽  
pp. 20140071 ◽  
Author(s):  
Matthew Gilbert ◽  
Linwei He ◽  
Colin C. Smith ◽  
Canh V. Le
Keyword(s):  
Effective Means ◽  
Maximum Load ◽  
Layout Optimization ◽  
Benchmark Problems ◽  
Potential Yield ◽  
Yield Line ◽  
The Past ◽  
Critical Yield ◽  
Line Patterns ◽  
Line Analysis

The yield-line method of analysis is a long established and extremely effective means of estimating the maximum load sustainable by a slab or plate. However, although numerous attempts to automate the process of directly identifying the critical pattern of yield-lines have been made over the past few decades, to date none has proved capable of reliably analysing slabs of arbitrary geometry. Here, it is demonstrated that the discontinuity layout optimization (DLO) procedure can successfully be applied to such problems. The procedure involves discretization of the problem using nodes inter-connected by potential yield-line discontinuities, with the critical layout of these then identified using linear programming. The procedure is applied to various benchmark problems, demonstrating that highly accurate solutions can be obtained, and showing that DLO provides a truly systematic means of directly and reliably automatically identifying yield-line patterns. Finally, since the critical yield-line patterns for many problems are found to be quite complex in form, a means of automatically simplifying these is presented.

Yield-line theory and plasticity

1972 ◽  
Vol 24 (78) ◽  
pp. 37-42
Author(s):  
D. H. Clyde
Keyword(s):  
Yield Line ◽  
Yield Line Theory ◽  
Line Theory
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