Title: Comparative Study of Pile Cap
Design
Author : Mariam
Saber Hana Collection : M.Sc.
Structural
Abstract
Pile
caps are crucial element for transmitting superstructure and substructure loads
to the piles. The work presented in the thesis is dealing with concentric
loaded pile caps,attached to pile groups symmetrically arranged about the
column. The applied loads acting on pile cap resulted highly nonlinear strain
distribution. The work presented is focused on the analysis of concentrically
loaded pile caps using sectional approach, based on empirical formulas for
flexural element, and, also, using strut and tie model. The two methods were
calibrated with laboratory test results on pile caps published by different
authors. Special attentions were given to the justifications of Egyptian code
of practice for reinforced concrete provision dealing with the design of pile
cap, with the laboratory test results. The same considerations were applied on
ACI 318 provisions.
The work was focused also on the design of pile caps using strut
and tie model. The thesis presented solved problems for obtaining thickness and
reinforcement of pile caps attached to two, three, four, six and nine piles
arranged symmetrically about the column.
The problems were solved using ACI code implementing code defined
critical section and strut and tie model. The object of the solved problems is
to conduct a comparison between the outcome from the two procedures with
respect to pile cap depth and reinforcement. Finally, the strut and tie model
was presented in three dimensions and the forces in strut and tie model were
obtained using commercial software. Comparison between forces in strut and tie
using two and three dimensional models was conducted.
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