Buildings subjected to a large intensity ground motion often deform well into the inelastic range.In particular asymmetric buildings undergo coupled inelastic lateral and torsional deformations that couldbe more complex. Hence there are many difficulties for studies in this field

and some controversies stillexist. This paper focuses on the effects of modelling

stiffness

strength

and mass eccentricities on the in-elastic behavior of asymmetric building systems under lateral loads. The elastic behavior of asymmetricbuildings under lateral loads is related to stiffness and mass eccentricities

while the inelastic behavior ofasymmetric buildings under lateral loads is dependent upon modeling

stiffness eccentricity

mass eccen-tricity and strength eccentricity as well. The strength eccentricity can more exactly reflect the inelastic be-havior of asymmetric buildings under lateral loads than stiffness eccentricity. A brief summary on the in-elastic behavior of asymmetric buildings under lateral loads is provided in this paper. The existing studiesarrived at different

and even contradicting conclusions

the causes of which are explored in this paper.