  A summary is presented of ATLAS searches for gluinos and first- and
second-generation squarks in final states containing jets and missing
transverse momentum, with or without leptons or b-jets, in the $\sqrt{s}$ = 8
TeV data set collected at the Large Hadron Collider in 2012. This paper reports
the results of new interpretations and statistical combinations of previously
published analyses, as well as a new analysis. Since no significant excess of
events over the Standard Model expectation is observed, the data are used to
set limits in a variety of models. In all the considered simplified models that
assume R-parity conservation, the limit on the gluino mass exceeds 1150 GeV at
95% confidence level, for an LSP mass smaller than 100 GeV. Furthermore,
exclusion limits are set for left-handed squarks in a phenomenological MSSM
model, a minimal Supergravity/Constrained MSSM model, R-parity-violation
scenarios, a minimal gauge-mediated supersymmetry breaking model, a natural
gauge mediation model, a non-universal Higgs mass model with gaugino mediation
and a minimal model of universal extra dimensions.
