In　this　paper,　the　effectiveness　of　the　modeling　method　is　verified　by　the　finite　element　analysis　of　the　preliminary　test.　Three　finite　element　models　of　traditional　air-cooled　support　structure,　＇large　diameter　RC　tubular　columns　+　LBRB＇　energy　dissipation　structure　and　＇small　diameter　RC　tubular　columns　+　LBRB＇　energy　dissipation　structure　are　established.　Based　on　IDA　method,　the　fragility　of　air-cooled　support　structure　and　energy　dissipation　structures　is　studied.　The　study　shows　that　the　addition　of　LBRB　can　effectively　improve　the　horizontal-torsional　coupling　phenomenon　of　the　structure,　improve　the　ductility　and　seismic　performance,　and　reduce　the　failure　probability　of　the　structure.　Adding　LBRBs　and　reducing　the　diameter　of　RC　tubular　columns　can　play　the　role　of　LBRB　energy　dissipation　to　a　greater　extent,　so　that　the　structure　can　obtain　stronger　anticollapse　capacity　and　better　economy,　which　is　more　conducive　to　the　realization　of　seismic　performance-based　fortification　goal.　It　is　suggested　that　three-dimensional　ground　motion　input　should　be　used　for　fragility　analysis.　If　the　dimension　of　ground　motion　input　is　reduced,　the　assessment　results　will　be　biased　to　danger.