CAJ | 학술논문

为了给屈曲约束支撑框架设计提供参考，对单层屈曲约束支撑框架的抗震参数进行了研究．通过结构侧移分析，推导出表征该结构体系受力和变形特性的3个关键参数：支撑框架刚度比、支撑框架屈服强度比和梁柱线刚度比．以特定地震动下结构最大位移和残余位移作为评价指标，对结构进行了参数化分析．分析结果表明：当支撑框架刚度比和梁柱线刚度比较小时，增大刚度比可以明显减小结构位移；支撑框架屈服强度比主要对结构的屈服位移和机制影响较大；支撑框架刚度比、支撑框架屈服强度比和梁柱线刚度比的合理值分别为2，0.7和0.45～5.00．据此设计了2个单层算例，并进行了抗震性能分析．结果表明：在结构中，形成了支撑梁柱屈服机制；当支撑屈服后，框架承担的剪力比逐渐增大；支撑布置方式对结构顶点位移响应基本无影响，对相邻柱的轴力影响则较大．
위료급굴곡약속지탱광가설계제공삼고，대단층굴곡약속지탱광가적항진삼수진행료연구．통과결구측이분석，추도출표정해결구체계수력화변형특성적3개관건삼수：지탱광가강도비、지탱광가굴복강도비화량주선강도비．이특정지진동하결구최대위이화잔여위이작위평개지표，대결구진행료삼수화분석．분석결과표명：당지탱광가강도비화량주선강도비교소시，증대강도비가이명현감소결구위이；지탱광가굴복강도비주요대결구적굴복위이화궤제영향교대；지탱광가강도비、지탱광가굴복강도비화량주선강도비적합리치분별위2，0.7화0.45～5.00．거차설계료2개단층산례，병진행료항진성능분석．결과표명：재결구중，형성료지탱량주굴복궤제；당지탱굴복후，광가승담적전력비축점증대；지탱포치방식대결구정점위이향응기본무영향，대상린주적축력영향칙교대．
To provide the design reference for the frame structure with buckling-restrained brace ( BRB) , the seismic parameters of the single-layer buckling-restrained braced frame ( BRBF) struc-ture are studied.By lateral displacement analysis, three key parameters characterizing the structural force and deformation, the BRB-to-frame stiffness ratio, the BRB-to-frame yield strength ratio and the beam-to-column line stiffness ratio, are derived.By taking the maximum displacement and the residual displacement under the specific ground motion as the evaluation indexes, parametric analyses are carried out.The analysis results show that when the BRB-to-frame stiffness ratio and the beam-to-column line stiffness ratio are small, both kinds of displacements decrease with the increase of the ratios.The BRB-to-frame yield strength ratio influences greatly on the structural yield displacement and mechanism.The reasonable values of the BRB-to-frame stiffness ratio, the BRB-to-frame yield strength ratio and the beam-to-column line stiffness ratio are 2, 0.7 and 0.45~5.00, respectively. Base on these reasonable values, two examples are designed and the corresponding seismic perform-ance is analyzed.The results show that the BRB-beam-column yield mechanism is formed in the structures.After the BRB yields, the ratio of the shear forces of the frame increases gradually.The layout principle of BRB has almost no obvious influence on the roof displacement response, but af-fects significantly the axial force of the adjacent columns.