International Journal of Civil Engineering
IJCE
Engineering & Technology
http://ijce.iust.ac.ir
18
agent2
1735-0522
2383-3874
10.22068/IJCE
en
jalali
1393
3
1
gregorian
2014
6
1
12
2
online
1
fulltext
en
The Effect of Foundation Uplift on Elastic Response of Soil-Structure Systems
Structure-Earthquake
Structure-Earthquake
Research Paper
Research Paper
It is well-known that the behavior of soil-structure systems can be well described using a limited number of non-dimensional parameters. This is the outcome of researches based on the premise that the foundation is bonded to the ground. Here, it is shown the concept can be extended to systems with foundation uplift. A set of non-dimensional parameters are introduced which controls the main features of uplifting systems. The effect of foundation uplift on response of soil-structure systems are investigated parametrically through time history analysis for a wide range of systems subjected to ground motions recorded on different soil types. In particular, the effects of uplift on displacement ratio, defined as the ratio of maximum displacement of the uplifting system to that of the elastic system without uplifting and drift ratio, defined as the ratio of maximum drift of the structure as a part of uplifting soil-structure system to that of the elastic system without uplifting, are investigated. It is observed that in general foundation uplift reduces the drift response of structures, which in turn, results in lower base shear. The reduction reaches about 35 percent for slender structures located on relatively soft soils subjected to strong ground motions. Simplified expressions are suggested to estimate this reduction in the base shear.
Soil-Structure Interaction, Foundation Uplift, Displacement Ratio, Drift Ratio
146
157
http://ijce.iust.ac.ir/browse.php?a_code=A-10-361-1&slc_lang=en&sid=en
Amir Hossein
Jafarieh
amir_jafarieh@yahoo.com
`180031947532846008011`

180031947532846008011
No
P.O. Box: 11155-9313, Tehran, Iran
Mohammad Ali
Ghannad
ghannad@sharif.edu
`180031947532846008012`

180031947532846008012
Yes
P.O. Box: 11155-9313, Tehran, Iran