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ASTM Selected Technical Papers
Behavior of Deep Foundations
By
R Lundgren
R Lundgren
1
Regional Managing Principal, Executive Vice President
,
Woodward-Clyde Consultants
,
San Francisco, Calif. 94111
;
editor
.
Search for other works by this author on:
ISBN-10:
0-8031-0291-7
ISBN:
978-0-8031-0291-0
No. of Pages:
622
Publisher:
ASTM International
Publication date:
1979

Information needed to compute the nominal strengths of various pile cross sections that are subjected to combined compressive thrust and bending moments is presented, with examples of moment-thrust interaction diagrams for several typical kinds of pile sections.

The components of the factor of safety are examined, with particular emphasis on the reliable strength of the pile section. The use of a “strength reduction factor,” a multiplier that is less than 1.0, to establish a reliable or minimum expected failure load that is somewhat lower than the nominal failure load to be expected from an ideal member is discussed.

This strength reduction factor may vary with the number of piles in an individual footing and should be higher for piles that can be inspected than for those that cannot be inspected after completion. Precast piles and piles that are cast in permanent metal cylinders are examples of members that can be inspected to different extents, while piles cast-in-place in unlined holes or that have the liner pulled out of the hole after the concrete is cast are examples of members that cannot be easily inspected after construction.

1.
Richart
,
F. E.
and
Brown
,
R. L.
, “
An Investigation of Reinforced Concrete Columns
,” Bulletin 267,
Engineering Experiment Station
,
University of Illinois, Urbana
,
1934
.
2.
Richart
,
F. E.
,
Draffin
,
J. O.
,
Olson
,
T. A.
, and
Heitman
,
R. H.
, “
Effect of Eccentric Loading, Protective Shell, Slenderness Ratios, and Other Variables in Reinforced Concrete Columns
,” Bulletin 368,
Engineering Experiment Station University of Illinois
,
Urbana
,
1948
.
3.
Hognestad
,
E.
, “
A Study of Combined Bending and Axial Load in Reinforced Concrete Members
,” Bulletin 399,
Engineering Experiment Station University of Illinois
,
Urbana
,
1951
.
4.
Davisson
,
M. T.
,
Proceedings
, Design, Construction and Performance of Deep Foundations,
American Society of Civil Engineers—University of California
,
Berkeley
,
08
1975
.
5.
Ferguson
,
P. M.
,
Reinforced Concrete Fundamentals
, 3rd ed.,
Wiley
,
New York
,
1973
.
6.
Lacey
,
H. S.
, “
Load Testing of Instrumented 225-Ft-Long Prestressed Concrete Piles
,” this volume.
7.
Hernandez
,
H. D.
and
Gamble
,
W. L.
, “
Time-Dependent Prestress Losses in Pre-tensioned Concrete Construction
,” Civil Engineering Studies, Structural Research Series No.
417
,
University of Illinois
at
Urbana-Champaign
,
05
1975
.
8.
Davisson
,
M. T.
and
McDonald
V. J.
in
Performance of Deep Foundations, ASTM STP 444
,
American Society for Testing and Materials
,
1969
, pp. 295–337.
9.
Watstein
,
D.
,
Proceedings
, American Concrete Institute, Vol.
49
,
04
1953
, pp. 729–744.
10.
McHenry
,
D.
and
Shideler
,
J. J.
in
Speed and Testing, ASTM STP 185
,
American Society for Testing and Materials
,
1956
, pp. 72–82.
11.
Awad
,
M. E.
, and
Hilsdorf
,
H. K.
, “
Strength and Deformation Characteristics of Plain Concrete Subjected to High Repeated and Sustained Loads
,” Civil Engineering Studies, Structural Research Series No.
372
,
University of Illinois
at
Urbana-Champaign
,
02
1971
.
12.
Rusch
,
H.
,
Proceedings
, American Concrete Institute, Vol.
57
,
07
1960
, pp. 1–28.
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