防屈曲支撐框架設(shè)計方法研究
趙瑛，郭彥林
- 摘 要
-
(清華大學(xué)土木工程系，北京 100084)［摘要］采用數(shù)值手段，研究了防屈曲支撐框架和普通中心支撐框架在性能上的差異?；趶椝苄詴r程分析，由大量防屈曲支撐框架算例，建立支撐框架結(jié)構(gòu)在大震下的層間位移角最大值隨抗側(cè)剛度比k變化的關(guān)系曲線，按照大震不倒的要求，獲得k值的合理取值范圍。分別對不同k值下支撐框架結(jié)構(gòu)的設(shè)計進行研究，得到相應(yīng)k值下允許設(shè)計的最弱框架(即框架設(shè)計的臨界點)，供結(jié)構(gòu)設(shè)計參考。［關(guān)鍵詞］防屈曲支撐；防屈曲支撐框架；中心支撐框架；抗側(cè)剛度比；設(shè)計方法Research on design method of buckling restrained braced framesZhao Ying, Guo Yanlin (Civil Engineering Department, Tsinghua University, Beijing 100084, China)Abstract:The behavior differences of buckling restrained braces frames (BRBF) and concentrically braced frames (CBF) have been researched by numerical examples. Based on a large number of elasto-plastic time-history analysis of BRBF examples, the relationship between maximum story drift and lateral stiffness ratio k is established for BRBF subjected to large earthquakes, and according to current Chinese codes for structural design, a reasonable range of lateral stiffness ratio k is recommended. The weakest pure frames are achieved for different k values, which are the reference for preliminary design of BRBF.Keywords:buckling restrained braces (BRB); buckling restrained braced frames (BRBF); concentrically braced frames (CBF); lateral stiffness ratio; design method教育部博士點基金資助項目(20060003045)。作者簡介：趙瑛，碩士，Email:ying_zhao02@mails.tsinghua.edu.cn。參考文獻［1］WAKABAYASHI M, NAKAMURA T, et al. Experimental study on the elasto-plastic behavior of braces enclosed by precast concrete panels under horizontal cyclic loading: parts 1 and 2［R］. Summaries of Technical Papers of Annual Meeting, Architectural Institute of Japan, Structural Engineering Section. 10: 1041-1044.［2］KIMURA K, YOSHIZAKI, TAKEDA T. Tests on braces encased by mortar in-filled steel tubes［C］//Summaries of Technical Papers of Annual Meeting, Architectural Institute of Japan,1976, 1041: 1-42.［3］FUJIMOTO M, WADA A, et al. A study on the unbonded brace encased in bucklingrestraining concrete and steel tube［J］. Journal of Structural and Construction Engineering,(34B): 249-258.［4］KIM J, SEO Y. Seismic design of low-rise steel frames with buckling-restrained braces［J］. Engineering Structures, 2004,26(5): 543-551.［5］劉建彬.防屈曲支撐及防屈曲支撐鋼框架設(shè)計理論研究［D］.北京：清華大學(xué)， 2005.［6］郭彥林，劉建彬, 等.結(jié)構(gòu)的耗能減震與防屈曲支撐［J］. 建筑結(jié)構(gòu)，2005，35(8)：18-23.［7］CHOI H, KIM J. Energy-based seismic design of buckling-restrained braced frames using hysteretic energy spectrum［J］. Engineering Structures, 2006, 28: 304-311.［8］程光煜.基于能量抗震設(shè)計方法及其在鋼支撐框架結(jié)構(gòu)中的應(yīng)用［D］.北京：清華大學(xué)，2007.［9］KAZUO INOUE. Hysteresis-type vibration dampers-design of steel frames incorporating hysteretic vibration dampers (1)［J］. Steel Construction Today & Tomorrow, 2004(7):4-6.［10］KAZUO INOUE. Hysteresis-type vibration dampers-design of steel frames incorporating hysteretic vibration dampers (2)［J］. Steel Construction Today & Tomorrow, 2004(8):4-6.［11］GB50011—2001 建筑抗震設(shè)計規(guī)范［S］.北京：中國建筑工業(yè)出版社，2001.
