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Strength of footing with punching shear preventers.

Lee SS, Moon J, Park KS, Bae KW - ScientificWorldJournal (2014)

Bottom Line: The punching shear failure is an undesirable failure mode, since it results in a brittle failure of the footing.The validation and effectiveness of PSP were verified through a series of experimental studies.Finally, the design recommendations for the footing with PSPs were suggested.

View Article: PubMed Central - PubMed

Affiliation: Advanced Building Research Division, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang-si, Gyeonggi-do 411-712, Republic of Korea.

ABSTRACT
The punching shear failure often governs the strength of the footing-to-column connection. The punching shear failure is an undesirable failure mode, since it results in a brittle failure of the footing. In this study, a new method to increase the strength and ductility of the footing was proposed by inserting the punching shear preventers (PSPs) into the footing. The validation and effectiveness of PSP were verified through a series of experimental studies. The nonlinear finite element analysis was then performed to demonstrate the failure mechanism of the footing with PSPs in depth and to investigate the key parameters that affect the behavior of the footing with PSPs. Finally, the design recommendations for the footing with PSPs were suggested.

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Loading and boundary condition of the finite element model.
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Related In: Results  -  Collection


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fig11: Loading and boundary condition of the finite element model.

Mentions: Figure 11 represents the loading and the boundary conditions for the finite element models. Since the quarter model was used in this study, displacements in x and y direction were restrained for the left side and the bottom section, respectively, as shown in Figure 11. To simulate the boundary condition of the reaction block, displacements in z direction of the right and top edges were constrained, as shown in Figure 11 (only for 625 mm which is the half width of the reaction block. Refer to test setup shown in Figure 4). In addition, displacements in x and y direction in the location of anchor bar installed in the right and top edges were restrained, respectively. It is noted that the diameter of the anchor bar is 40 mm. Finally, the displacement loading in z direction was applied to simulate the load acting through the column.


Strength of footing with punching shear preventers.

Lee SS, Moon J, Park KS, Bae KW - ScientificWorldJournal (2014)

Loading and boundary condition of the finite element model.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4221878&req=5

fig11: Loading and boundary condition of the finite element model.
Mentions: Figure 11 represents the loading and the boundary conditions for the finite element models. Since the quarter model was used in this study, displacements in x and y direction were restrained for the left side and the bottom section, respectively, as shown in Figure 11. To simulate the boundary condition of the reaction block, displacements in z direction of the right and top edges were constrained, as shown in Figure 11 (only for 625 mm which is the half width of the reaction block. Refer to test setup shown in Figure 4). In addition, displacements in x and y direction in the location of anchor bar installed in the right and top edges were restrained, respectively. It is noted that the diameter of the anchor bar is 40 mm. Finally, the displacement loading in z direction was applied to simulate the load acting through the column.

Bottom Line: The punching shear failure is an undesirable failure mode, since it results in a brittle failure of the footing.The validation and effectiveness of PSP were verified through a series of experimental studies.Finally, the design recommendations for the footing with PSPs were suggested.

View Article: PubMed Central - PubMed

Affiliation: Advanced Building Research Division, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang-si, Gyeonggi-do 411-712, Republic of Korea.

ABSTRACT
The punching shear failure often governs the strength of the footing-to-column connection. The punching shear failure is an undesirable failure mode, since it results in a brittle failure of the footing. In this study, a new method to increase the strength and ductility of the footing was proposed by inserting the punching shear preventers (PSPs) into the footing. The validation and effectiveness of PSP were verified through a series of experimental studies. The nonlinear finite element analysis was then performed to demonstrate the failure mechanism of the footing with PSPs in depth and to investigate the key parameters that affect the behavior of the footing with PSPs. Finally, the design recommendations for the footing with PSPs were suggested.

Show MeSH