FRCM/SRG strengthened masonry in diagonal compression: experimental results and analytical approach proposal

2021 ◽  
Vol 283 ◽  
pp. 122766
Author(s):  
Francesca Ferretti ◽  
Claudio Mazzotti
Keyword(s):  
Analytical Approach ◽  
Experimental Results ◽  
Diagonal Compression

scholarly journals In-plane Shear Strengthening of Unreinforced Masonry Walls Using GFRP Jacketing

2017 ◽  
Author(s):  
Enea Mustafaraj ◽  
Yavuz Yardim
Keyword(s):  
Experimental Results ◽  
Test Results ◽  
Compression Tests ◽  
Shear Strengthening ◽  
Plane Shear ◽  
Standard Size ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Diagonal Compression ◽  
Before And After

In this paper, it is presented the experimental results of a campaign on diagonal compression tests, as of ASTM E519-02, to assess and compare the in-plane behavior of standard size of 1200 × 1200 × 250 mm, for three unreinforced and three reinforced wall panels by glass fiber reinforced polymer (GFRP) embedded in an inorganic matrix.From the diagonal compression test results, were determined some of the main mechanical parameters such as: shear strength, modulus of rigidity and ductility, before and after application of the reinforcement.The experimental results showed that the GFRP reinforced panels exhibited a significant increase of 127% in shear resistance, 1100% in ductility and 650% in modulus of rigidity when compared to unreinforced panels.It was concluded that this technique provided satisfactory results and can be considered a suitable method for repair of masonry structures.

An Approximate Model for an Elastic-Plastic Pipe Element Under Combined Loading

1975 ◽  
Vol 97 (1) ◽  
pp. 22-28 ◽  
Author(s):  
L. D. Larson ◽  
W. F. Stokey ◽  
W. E. Franzen
Keyword(s):  
Strain Hardening ◽  
Axial Load ◽  
Analytical Approach ◽  
Limit Load ◽  
Approximate Model ◽  
Experimental Results ◽  
Combined Loading ◽  
Elastic Plastic ◽  
Plastic Pipe ◽  
Plastic Analysis

An approximate model for the elastic-plastic analysis of a pipe element under combined loading is developed. The model is obtained by generalizing a limit load solution for combined pressure, bending, torsion and axial load to include strain hardening. For various combinations of loading of tubes, curvatures and twist angles are predicted and compared with experimental results and those predicted by a more rigorous analytical approach. The comparison shows that good results are obtained from the approximate model.

Seismic Resistance of Unreinforced Brick Masonry Buildings: An Experimental Study

2011 ◽  
Vol 255-260 ◽  
pp. 2622-2626 ◽  
Author(s):  
Azmat Ullah ◽  
Khan Shahzada ◽  
Akhtar Naeem Khan ◽  
Amjad Naseer ◽  
Mohammad Ashraf ◽  
...  
Keyword(s):  
Experimental Study ◽  
Axial Compression ◽  
Rice Husk ◽  
Brick Masonry ◽  
Experimental Results ◽  
Wire Mesh ◽  
Seismic Resistance ◽  
Masonry Buildings ◽  
Wall Surface ◽  
Diagonal Compression

This paper presents a study on seismic resistance of typical single and double storey masonry buildings constructed in the southern districts of Pakhthunkhwa, Pakistan. Two types of bricks; wooden and rice husk burnt bricks, have been investigated in combination with mud and cement-sand mortar. Plane and reinforced specimens have been tested in axial compression and diagonal compression. Analysis of the experimental results show that both single and double storey buildings constructed in the study area with mud mortar and mud plaster are seismically vulnerable. However application of the wire mesh on wall surface subsequently plastered increases the strength significantly and make the structure resistant to the earthquake forces.

Kapees3: A High-Quality VLSI Placement Tool Using Nesterov’s Method for Density Penalty

2018 ◽  
Vol 27 (08) ◽  
pp. 1850122
Author(s):  
Sameer Pawanekar ◽  
Kalpesh Kapoor ◽  
Gaurav Trivedi
Keyword(s):  
Nonlinear Programming ◽  
Nonlinear Equations ◽  
Analytical Approach ◽  
Quadratic Optimization ◽  
Experimental Results ◽  
Standard Cell ◽  
Feng Shui ◽  
High Quality ◽  
Cell Placement ◽  
Number Of Cells

We present an analytical approach that is based on nonlinear programming to perform VLSI standard cell placement. Our method first clusters a netlist to reduce the number of cells and then performs quadratic optimization on the reduced netlist. Finally, it uses Nesterov’s method for solving nonlinear equations for the problem. The framework of our tool, Kapees3, is scalable and generates high quality results. The experimental results for Peko Suite 1 and Peko Suite 2 benchmarks show promising improvements. Our placement tool outperforms NTUPlace3, Dragon, Feng Shui, Capo10.5, by 46%, 57%, 48% and 25%, respectively, on PEKO Suite 1. For PEKO Suite 2, our placement tool outperforms NTUPlace3, Dragon, Feng Shui, Capo10.5 and mPL6 by 30%, 47%, 57%, 69% and 2.7%, respectively. On MMS benchmarks, we obtain wirelength improvement over Capo10.5 by 56.62%, FLOP by 7.84%, FastPlace by 11.55%, ComPLx by 4.58%, POLAR by 23.67%, mPL6 by 9.96% and NTUPlace3-Unified by 2.96%.

scholarly journals Assessment of the early-age strains and stresses in 2D restrained self-stressed members

2020 ◽  
Vol 19 (4) ◽  
pp. 085-094
Author(s):  
Viktar V. Tur ◽  
Volha H. Sannikava
Keyword(s):  
Analytical Approach ◽  
Experimental Results ◽  
Development Model ◽  
Early Age ◽  
Steel Tubes ◽  
Mesh Reinforcement ◽  
Centre Of Gravity ◽  
Expansive Concrete ◽  
Iterative Procedures ◽  
Concrete Filled Steel Tubes

The paper presents the implementation of the modified strains development model (MSDM) for the two-way restrained self-stressed members such as expansive concrete-filled steel tubes and expansive concrete plane elements with arbitrary orthogonal reinforcement. The analytical approach allows defining the restrained strains and stresses in any 2D restraint conditions by following the iterative procedures and accounting for the elastic-plastic behaviour of expansive concrete at an early age. The consistency of the proposed method was confirmed by assessing the experimental results of the two series of the expansive concrete-filled steel tubes and three series of the expansive concrete plane members with mesh reinforcement in the centre of gravity.

Analysing data with repeated observations on each experimental unit

1976 ◽  
Vol 87 (2) ◽  
pp. 423-432 ◽  
Author(s):  
J. G. Rowell ◽  
D. E. Walters
Keyword(s):  
Analytical Approach ◽  
Experimental Results ◽  
Experimental Unit ◽  
Repeated Observations ◽  
Plot Analysis ◽  
Split Plot ◽  
Scant Attention ◽  
Over Time

SummarySplit-plot (or split-block) analyses are commonly applied to experimental results where several successive observations of the same variable have been recorded on each experimental unit. The assumptions required for such analyses receive scant attention and it often seems unlikely that these assumptions would be satisfied in experimental situations. Five sets of results are presented to support this proposition. An alternative analytical approach is suggested in which contrasts over time are analysed; such a method is always valid, computationally simple, and readily interpretable, and may also be used to gauge the validity of the split-plot analysis.

The stresses induced in reinforced plastic matrix pipes by saddle supports

1982 ◽  
Vol 17 (3) ◽  
pp. 147-155 ◽  
Author(s):  
C B Greatorex ◽  
A S Tooth
Keyword(s):  
Analytical Approach ◽  
Shell Theory ◽  
Experimental Results ◽  
Pipe Material ◽  
Design Features ◽  
Analytical Results ◽  
Reinforced Plastic ◽  
Pipe Radius ◽  
Series Of Experiments ◽  
Plastic Matrix

The results of a series of experiments conducted on reinforced plastic matrix pipes show how the peak stresses, occurring in the saddle support region, can be reduced in magnitude by certain design features. Two methods are found of value: (1) to use a flexible medium, such as PVC or rubber, between the saddle and pipe, and (2) to support the pipe on a saddle with a radius greater than the pipe radius. The experimental results are compared with an analytical approach using shell theory making the assumption that the pipe material is isotropic. The agreement between the experimental and analytical results is promising.

scholarly journals An Analytical Approach for Deformation Shapes of a Cylindrical Shell with Internal Medium Subjected to Lateral Contact Explosive Loading

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Xiangyu Li ◽  
Zhenduo Li ◽  
Minzu Liang
Keyword(s):  
Cylindrical Shell ◽  
Explosive Charge ◽  
Analytical Approach ◽  
Plastic Hinge ◽  
Experimental Results ◽  
Rigid Plastic ◽  
Lateral Contact ◽  
Internal Medium ◽  
Contact Explosion ◽  
Spring Force

An experimental investigation on deformation shape of a cylindrical shell with internal medium subjected to lateral contact explosion was carried out briefly. Deformation shapes at different covered width of lateral explosive were recovered experimentally. Based on the experimental results, a corresponding analytical approach has been undertaken with rigid plastic hinge theory. In the analytical model, the cylindrical shell is divided into end-to-end rigid square bars. Deformation process of the cylindrical shell is described by using the translations and rotations of all rigid square bars. Expressions of the spring force, buckling moment, and deflection angle between adjacent rigid square bars are conducted theoretically. Given the structure parameters of the cylinder and the type of the lateral explosive charge, deformation processes and shapes are reported and discussed using the analytical approach. A good agreement has been obtained between calculated and experimental results, and thus the analytical approach can be considered as a valuable tool in understanding the deformation mechanism and predicting the deformation shapes of the cylindrical shell with internal medium subjected to lateral contact explosion. Finally, parametric studies are carried out to analyze the effects of deformation shape, including the covered width of the lateral explosive, explosive charge material, and distribution of initial velocity.

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