The　current　code-conforming　seismic　lateral　load　patterns　are　implicitly　derived　based　on　the　dynamic　solutions　of　fixed-base　elastic　structural　systems,　without　considering　the　effects　of　hysteretic　characteristic　and　soil-structure-interaction　(SSI).　Consequently,　such　lateral　force　patterns　may　not　be　applicable　for　the　seismic　design　of　nonlinear　deteriorating　structural　systems.　In　this　study,　the　analytical　model　was　constructed　using　the　shear　building　model.　The　peak-oriented　modified　I-K　model　and　sway-rocking　(S-R)　model　were　employed　to　simulate　the　deteriorating　behavior　and　SSI　effects,　respectively.　A　practical　optimization　design　procedure　for　optimal　lateral　load　pattern　was　developed　based　on　the　uniform　damage　distribution.　The　influence　of　main　parameters　on　the　new　lateral　load　pattern　was　comprehensively　investigated,　including　the　parameters　of　the　S-R　model　and　the　peak-oriented　modified　I-K　model,　ground　motion　excitations,　fundamental　period,　target　ductility,　damping　ratio　and　so　on.　The　quantified　expression　of　the　new　lateral　load　distribution　was　proposed　as　a　function　of　fundamental　period,　the　target　ductility,　aspect　ratio　and　shear　wave　velocity.　The　results　show　that　the　structures　designed　according　to　the　proposed　lateral　force　pattern　experienced　obviously　less　damage　than　the　code-conforming　pattern.