In　order　to　study　the　seismic　response　reduction　results　for　large-span　space　frame　hangar　structures,　vibration　control　analyses　were　performed　for　Beijing　A380　hangar　structure　subjected　to　three-dimensional　earthquake　ground　motions.　Viscous　dampers　were　adopted　as　the　vibration　control　device.　The　target　of　the　control　was　to　reduce　the　vertical　displacement　of　nodes　of　the　roof　structure.　The　dampers　were　installed　in　the　roof　space　frame,　in　the　lateral　load　resistant　structure,　in　both　roof　space　frame　and　lateral　load　resistant　structure,　respectively.　Different　control　approaches　were　compared.　The　analytical　results　indicated　that　when　the　dampers　were　installed　on　the　roof　frame　structure,　the　nonlinear　dampers　provided　about　the　same　control　effects　as　the　linear　dampers.　The　vibration　control　results　of　＇replacing　approach＇　were　better　than　that　of　＇appending　approach＇,　and　replacing　the　web　members　between　bottom　chord　and　middle　chord　had　better　efficiency　than　replacing　those　between　middle　chord　and　upper　chord.　Installing　the　dampers　at　the　middle　part　of　four　perimeter　sides　was　much　effective　comparing　with　installing　the　dampers　along　the　four　perimeter　sides　uniformly　or　around　the　nodes　which　had　the　maximum　vertical　displacement　of　the　original　structure,　the　number　of　dampers　should　be　properly　determined.　Installing　the　dampers　in　the　lateral　force　resistant　structure　was　more　effective　than　installing　them　in　the　roof　space　frame.　Moreover,　installing　the　dampers　both　in　the　steel　space　frame　and　in　the　lateral　force　resistant　structure　could　improve　the　control　performance.　This　paper　provides　a　useful　reference　for　practical　application　of　viscous　dampers　in　super　long-span　space　frame　structures.