Experimental and Numerical Investigation of Pile Group With and Without Building Frame Subjected to Axial Load

Self Cite

In the design of pile foundations, stiffness of the frame is neglected and superstructure is analyzed without considering the flexibility of soil mass. This leads to the inaccurate estimation of design forces (shear force and bending moments) and settlements. ANSYS software which is based on finite element method is used to analyze the influence of sand bed relative density of (35 and 70%), and pile spacing (3D and 4D) on the behavior of building frame supported by group of piles (2×2) when it subjected to vertical loads. Differential settlement and rotation are observed in case of the pile supported building frame. In addition to the pile cap rotation, pile head deflection in the horizontal direction is observed which is due to the interaction of super structure with substructure. The bending moment is negative for the dense sand compare to lose sand because of the more restraint of the piles even at the top layers.

Section: Results and Discussion Load-pile Head Deflection (Phd) Behaviormentioning

confidence: 97%

Influence of Relative Density and Pile Spacing on the Behavior of Building Frame Resting on Pile Groups - A Numerical Study

Koteswara¹,

Krishna

Vangari³

2022

Self Cite

“…Several investigators have given well-established theories for evaluating piles and pile groups behavior under different independent loading conditions viz. lateral, vertical and uplift loading [3][4], [8][9][10][11][12][13][14][15][16][17][18][19][20][21], [23][24][25][26][27], [29], [34][35][36], [42]. Various authors have conducted studies on combined lateral-uplift loading, lateral-vertical loading [18,41].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Vertical and Batter Piles under Lateral Loading Conditions: A Review

Premjani

Yadu

Bajaj

2022

Laterally loaded piles are generally used where high lateral load acts on the structures. Vertical piles along with batter piles are used in structures such as chimneys, towers, dock and harbor structures, and high-rise buildings. Various techniques have been used in literature to solve the laterally loaded pile problems. Among them p-y method is preferred over all other methods. Various researchers have provided analytical solutions for vertical and batter pile problems and are discussed in this paper. Experimental investigations were also carried out by various researchers on vertical and batter piles, indicating that the negative batter piles offer large resistance to lateral loads when compared with the vertical piles. The deflection values obtained from the analytical solutions were also compared with the model tests and were found to be in a good agreement. Numerical modeling conducted by various researchers on vertical and batter pile foundation by various researchers is also discussed in this paper.

“…Batter piles are known for resisting high lateral loads but in current study the focus is on finding the uplift load capacity of the vertical as well as the batter pile having different angles. Various researchers ( [1], [3], [10][11][12][13][14][15][16][17][18][19][20], [22], [26], [28]) have already performed study on vertical and batter piles under lateral loads, but only a few have conducted study on uplift capacity of the vertical and batter piles [4], [9], [21], [27]. In the current study experiments were conducted on small scale model piles and it also includes the change of the slenderness ratios and variation of batter angles.…”

Section: Introductionmentioning

confidence: 99%

Study on Vertical Piles Batter Piles and Pile Groups Under Uplift Load Conditions in Non-Cohesive Sub-soil

Yadu

Bajaj

Premjani

2022

Model study was carried out in the laboratory to know the effect of uplift loads on vertical piles, batter piles and pile groups. Mild steel piles having 22 mm outer diameter and 1 mm thickness were considered for the study. Different slenderness ratios of 18, 28, and 38 and various angles such as 0°, 15°, 25°, 35°, and 45° were considered for the study. Sand was poured at a fixed relative density in the mild steel tank. The experimental study shows that the pile and pile group attain a maximum value of uplift load capacity when the batter angle reaches to 35°. Further, increase in batter angle causes a reduction in the uplift capacity of the pile. It is also noticed from the experiment that the uplift capacity increases with the slenderness ratio of the pile but its variation is not linear. Pile group of four piles with two vertical piles having L/D ratio 38 and two batter piles of L/D ratio 28 offers same resistance as of the same pile group with all the piles having L/D ratio 38. Numerical modeling was performed using Plaxis-3D to analyse the behavior of vertical piles, batter piles and pile groups under uplift loads. A good correlation between Plaxis-3D results and experimental results was observed.