TY - JOUR
JF - IJCE
JO - IJCE
VL - 12
IS - 2
PY - 2014
Y1 - 2014/6/01
TI - The Effect of Foundation Uplift on Elastic Response of Soil-Structure Systems
TT -
N2 - 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.
SP - 146
EP - 157
AU - Jafarieh, Amir Hossein
AU - Ghannad, Mohammad Ali
AD - Sharif University of Technology
KW - Soil-Structure Interaction
KW - Foundation Uplift
KW - Displacement Ratio
KW - Drift Ratio
UR - http://ijce.iust.ac.ir/article-1-795-en.html
ER -