新型鋼框架-熔斷子結構體系的受力機制與塑性分析

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中圖分類號：TU391 文獻標志碼：A

Load Mechanism and Plasticity Analysis of New-type Steel Frame-Fuse Substructure System

LIN Chen’， PENG Xiaotong 2 ， CHEN Dingyu 2 ，WANG Peng （1.School of Architectureand Landscape Design，Shandong Universityof Art and Design，Jinan ，Shandong，China; 2.School of Civil Engineeringand Architecture，Universityof Jinan，Jinan 25OO22，Shandong，China）

Abstract：To explore anew-type energy-disipating structural system and optimize structure of the system，acording to existing research onreplaceable energy disipationbeam segmentsand recoverable functional structureat homeand abroad，anew-type stel frame-fuse structural system was designed.Onthebasis of plasticanalysis theory，a typical yielding mechanism ofthesystemunderultimatestate was established，andsimplified calculation formulas for elastic lateral stiffessand ultimate bearing capacity were proposed.Push-over calculations onthe system wereconducted byusing finite element software SAP2oo，and push-over calculation results werecompared with thoseof simplifiedcalculation formulas.The results show thatconcentrating energy-dissipating beamsegments to form an energy-disipating substructure and combining it witha steel frame tocreatea steel frame system with afuse substructure，the system has a good seismic performance，and canrealize ideal energy dissipation and failure modes.Stifessand bearing capacity erors are both less than 5% ，indicating that the proposed simplified calculation formulas can predict elastic lateral stiffness and ultimate bearing capacity of the structure accurately.

Keywords： stel frame;fusesubstructure；plasticityanalysis;load mechanism;elastic lateral stifness；ultimate bearing capacity

耗能梁段是改善鋼結構抗震性能的關鍵構件，通過采用可更換式耗能梁段能降低結構震后的維修成本。（剩余7342字）