Experimental Study on Seismic Performance of Ungrouted Confined Concrete Masonry Walls with Unbonded Tendons

2017 ◽  
Vol 17 (3) ◽  
pp. 333-346 ◽  
Author(s):  
Zhanggen Guo ◽  
Songlin Zheng ◽  
Zhenwen Xu ◽  
Weimin Sun
Keyword(s):  
Experimental Study ◽  
Seismic Performance ◽  
Confined Concrete ◽  
Masonry Walls ◽  
Unbonded Tendons ◽  
Concrete Masonry ◽  
Concrete Masonry Walls

Stress-Strain Relationship and Seismic Performance of Cast-in-Situ Phosphogypsum

2017 ◽  
Vol 15 (1_suppl) ◽  
pp. 62-68 ◽  
Author(s):  
Yichao Zhang ◽  
Shaobin Dai ◽  
Wanlin Weng ◽  
Jun Huang ◽  
Ying Su ◽  
...  
Keyword(s):  
Seismic Performance ◽  
Masonry Walls ◽  
Stress Strain ◽  
Element Analysis ◽  
Concrete Masonry ◽  
Earthquake Resistant ◽  
Strain Relationship ◽  
Aerated Concrete ◽  
Concrete Masonry Walls

Background Phosphogypsum is a waste by-product during the production of phosphoric acid. It not only occupies landfill, but also pollutes the environment, which becomes an important factor restricting the sustainable development of the phosphate fertilizer industry. Research into cast-in-situ phosphogypsum will greatly promote the comprehensive utilization of stored phosphogypsum. The aim of this study was to clarify the mechanical properties of phosphogypsum. Methods Stress-strain relationships of cast-in-situ phosphogypsum were investigated through axial compressive experiments, and seismic performance of cast-in-situ phosphogypsum walls and aerated-concrete masonry walls were simulated based on the experimental results and using finite element analysis. Results The results showed that the stress-strain relationship fitted into a polynomial equation. Moreover, the displacement ductility index and the energy dissipation index of cast-in-situ phosphogypsum wall were 6.587 and 3.425, respectively. Conclusions The stress-strain relationship for earthquake-resistant performance of cast-in-situ phosphogypsum walls is better than that of aerated-concrete masonry walls. The curve of stress-strain relationship and the evaluation of earthquake-resistant performance provide theoretical support for the application of cast-in-situ phosphogypsum in building walls.

In-plane flexural strength of unbonded post-tensioned concrete masonry walls

2017 ◽  
Vol 136 ◽  
pp. 245-260 ◽  
Author(s):  
Reza Hassanli ◽  
Mohamed A. ElGawady ◽  
Julie E. Mills
Keyword(s):  
Flexural Strength ◽  
Masonry Walls ◽  
Concrete Masonry ◽  
Concrete Masonry Walls ◽  
Post Tensioned

scholarly journals Behavior of Partially Grouted Concrete Masonry Walls under Quasi-Static Cyclic Lateral Loading

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2424
Author(s):  
Sebastián Calderón ◽  
Laura Vargas ◽  
Cristián Sandoval ◽  
Gerardo Araya-Letelier
Keyword(s):  
Shear Strength ◽  
Aspect Ratio ◽  
Load Capacity ◽  
Masonry Walls ◽  
Lateral Stiffness ◽  
Edge Elements ◽  
Vertical Reinforcement ◽  
Concrete Masonry ◽  
Resistance Degradation ◽  
Concrete Masonry Walls

Eight partially grouted (PG-RM) concrete masonry walls were tested to study the influence of the strength and width of blocks, the wall aspect ratio, the horizontal and vertical reinforcement ratio, and the presence of edge elements (flanges). The results were analyzed in terms of the failure mode, damage progression, shear strength, lateral stiffness degradation, equivalent viscous damping ratio, and displacement ductility. Additionally, the performances of some existing shear expressions were analyzed by comparing the measured and predicted lateral load capacity of the tested walls. Based on the results, a slight increment in the lateral stiffness was achieved when employing stronger blocks, while the shear strength remained constant. Besides, increasing the width of concrete blocks did not have a significant effect on the shear strength nor in the initial tangential stiffness, but it generated a softer post-peak strength degradation. Increasing the wall aspect ratio reduced the brittleness of the response and the shear strength. Reducing the amount of vertical reinforcement lowered the resulting shear strength, although it also slowed down the post-peak resistance degradation. Transversal edge elements provided integrity to the wall response, generated softer resistance degradation, and improved the symmetry of the response, but they did not raise the lateral resistance.

scholarly journals Experimental and numerical analysis on the structural fire behaviour of three-cell hollowed concrete masonry walls

2021 ◽  
Vol 228 ◽  
pp. 111439
Author(s):  
Rafael G. Oliveira ◽  
João Paulo C. Rodrigues ◽  
João Miguel Pereira ◽  
Paulo B. Lourenço ◽  
Rúben F.R. Lopes
Keyword(s):  
Numerical Analysis ◽  
Masonry Walls ◽  
Fire Behaviour ◽  
Structural Fire ◽  
Concrete Masonry ◽  
Concrete Masonry Walls
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