Seismic　behaviors　of　long-span　connected　structures　under　multi-dimensional　and　earthquake　excitation　while　considering　wave　passage　effect　are　investigated　through　both　numerical　simulation　and　a　shaking　table　test　on　a　scaled　model.　It　is　found　that　seismic　responses　will　be　increased　significantly　if　multi-dimensional　earthquake　excitation　is　considered;　and　wave-passage　effect　has　diverse　influence　on　different　elements.　Also　special　attentions　should　be　paid　to　those　elements　near　connections　between　the　main　tower　and　the　corridor　which　inertial　forces　may　change　a　lot　when　subjected　to　Traveling　wave　excitation　with　different　apparent　velocities.　Moreover,　the　vertical　acceleration　responses　of　the　corridor　can　be　increased　significantly　due　to　wave　passage　effect.　Therefore,　it　is　necessary　for　aseismic　design　of　long-span　connected　structure　to　take　into　account　multi-dimensional　earthquake　components　and　multi-support　earthquake　excitations　with　different　apparent　velocities.