Optimization Techniques for Generating Yield-Line Patterns

2009 ◽  
Author(s):  
J.J. McKeown ◽  
A. Jennings ◽  
A. Thavalingam ◽  
D. Sloan
Keyword(s):  
Optimization Techniques ◽  
Yield Line ◽  
Line Patterns

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.

A comparative study on yield line mechanisms for four bolted extended end-plated connection

2021 ◽  
Vol 7 (2) ◽  
pp. 93
Author(s):  
Yasin Onuralp Özkılıç
Keyword(s):  
Experimental Data ◽  
Numerical Analysis ◽  
Plate Thickness ◽  
Economic Feasibility ◽  
Moment Connections ◽  
Yield Line ◽  
End Plate ◽  
Moment Resisting ◽  
Plate Connections ◽  
Line Patterns

Extended end-plated connections are preferred in moment resisting frames due to their advantages such as no required in-situ welding, accurate fabrication and economic feasibility compared to flange welded moment connections. The capacity of the extended end-plated connections depends on bolt configurations, end-plate thickness, bolt diameter and their material properties excluding column part. The thickness of end-plate can be computed using yield line mechanisms. Different yield line patterns are available in the literature and some of these are adopted in seismic codes to estimate the thickness of end-plate. In this study, the accuracy of different yield line patterns is compared using collected experimental data and numerical analysis. A parametric numerical analysis was conducted utilizing the finite element tool, ABAQUS. The results of experimental data and parametric study were evaluated for both unstiffened and stiffened four bolted extended end-plated connections. The results revealed that the capacity of the end-plate connections significantly depends on the yield line mechanism. Therefore, selecting an accurate yield line mechanism is essential in order not to overestimate the thickness of the end-plate. More importantly is that these yield line mechanisms can be directly implemented to AISC 358 and Turkish Building Earthquake Code 2018 (TBEC-2018).

Computer-assisted generation of yield-line patterns for uniformly loaded isotropic slabs using an optimisation strategy

1999 ◽  
Vol 21 (6) ◽  
pp. 488-496 ◽  
Author(s):  
A. Thavalingam ◽  
A. Jennings ◽  
D. Sloan ◽  
J.J. McKeown
Keyword(s):  
Computer Assisted ◽  
Yield Line ◽  
Line Patterns

Yield line patterns of T-stubs connected by thread-fixed one-side bolts under tension

2020 ◽  
Vol 166 ◽  
pp. 105932 ◽  
Author(s):  
Yue Zhang ◽  
Mei Liu ◽  
Qijie Ma ◽  
Zhenhua Liu ◽  
Peijun Wang ◽  
...  
Keyword(s):  
Yield Line ◽  
Line Patterns

Full-range behaviour of T-stubs with various yield line patterns

2021 ◽  
Vol 186 ◽  
pp. 106919
Author(s):  
Xianzhong Zhao ◽  
Shubin He ◽  
Shen Yan
Keyword(s):  
Full Range ◽  
Yield Line ◽  
Line Patterns

Optimisation of Yield Line Patterns

2009 ◽  
Author(s):  
A. Jennings ◽  
A. Thavalingam ◽  
J.J. McKeown ◽  
D. Sloan
Keyword(s):  
Yield Line ◽  
Line Patterns
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