具有侧向支撑的屈曲约束支撑整体稳定性分析
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摘要
传统的屈曲约束支撑是由外包构件、内核构件及填充在两者之间的砂浆所组成,具有良好的耗能能力,但也存在在反复荷载作用下由于砂浆开裂而产生的刚度退化和承载力劣化等缺点,因此提出了一种新型屈曲约束支撑,即在内核构件和外包构件之间不再灌注砂浆,而是设置钢板侧向支撑,并建立基于欧拉屈曲理论的力学模型,采用解析法和ANSYS有限元方法进行了理论分析,对临界荷载、外包构件的刚度及侧向支撑的数量得到了解析公式,对在具体结构中的使用得到了相应的设计步骤.
The traditional buckling restrained braces(BRB) consists of a core section encased in a outer tube filled with mortar.It performs a superb energy dissipation capacity.But the traditional BRB has the shortcomings such as rigidity degrading and abrupt change of carrying capacity,so we propose a new type of BRB.Between the new BRB's core section and the outer tube,no mortar is filled in and instead lateral braces are installed.From the configuration,we have set up the mechanical models based on the Euler's stability theory,and made a theoretical analysis by using the analytic method and finite element method with ANSYS software.The analytic formulae related to the critical load,rigidity of the outer tube and the number of lateral braces have been obtained and the design procedure used in the practical structure is also suggested.
The traditional buckling restrained braces(BRB) consists of a core section encased in a outer tube filled with mortar.It performs a superb energy dissipation capacity.But the traditional BRB has the shortcomings such as rigidity degrading and abrupt change of carrying capacity,so we propose a new type of BRB.Between the new BRB's core section and the outer tube,no mortar is filled in and instead lateral braces are installed.From the configuration,we have set up the mechanical models based on the Euler's stability theory,and made a theoretical analysis by using the analytic method and finite element method with ANSYS software.The analytic formulae related to the critical load,rigidity of the outer tube and the number of lateral braces have been obtained and the design procedure used in the practical structure is also suggested.
引文
[1]Wakabayashi M,Nakamura T,Kashibara A.ExperimentalStudy of Elasto-Plastic Properties of Precast Concrete WallPanels with Built-in Insulating Braces[A].Summaries of Tech-nical Papers of Annual Meeting[C].Architectural Institute ofJapan,1973,1 041-1 044.
[2]Fujimoto M,Wada A,Sacki E.A Study on The UnbondedBrace Encased in Buckling-restrained Concrete and Steel Tube[J].Journal of Structural Engineering,Architectural Instituteof Japan,1988,034B:249-258.
[3]Clark P,Aiken L,Kasai K.Design Procedures for Buildings In-corporating Hysteretic Damping Devices[A].Proceedings 69thAnnual Convention[C].SEAOC,1999,355-372.
[4]Black C,Makris N,Aiken L.Component Testing,Seismic Eval-uation and Characterization of Buckling-Restrained Braces[J].Journal of Structural Engineering,2004,130(6):880-894.
[5]陈绍蕃.钢结构稳定设计指南[M].北京:中国建筑工业出版社,2004.
[6]刘光栋,罗汉泉.杆系结构稳定[M].北京:人民交通出版社,1988.
[7]王秀丽,陈祥勇,殷占忠.约束屈曲支撑对K6型球面网壳减震效果的分析[J].甘肃科学学报,2007,19(1):122-126.
[8]朱彦鹏,张宪江.地震作用下约束屈曲支撑损伤量的数值分析[J].甘肃科学学报,2007,19(4):108-111.
[2]Fujimoto M,Wada A,Sacki E.A Study on The UnbondedBrace Encased in Buckling-restrained Concrete and Steel Tube[J].Journal of Structural Engineering,Architectural Instituteof Japan,1988,034B:249-258.
[3]Clark P,Aiken L,Kasai K.Design Procedures for Buildings In-corporating Hysteretic Damping Devices[A].Proceedings 69thAnnual Convention[C].SEAOC,1999,355-372.
[4]Black C,Makris N,Aiken L.Component Testing,Seismic Eval-uation and Characterization of Buckling-Restrained Braces[J].Journal of Structural Engineering,2004,130(6):880-894.
[5]陈绍蕃.钢结构稳定设计指南[M].北京:中国建筑工业出版社,2004.
[6]刘光栋,罗汉泉.杆系结构稳定[M].北京:人民交通出版社,1988.
[7]王秀丽,陈祥勇,殷占忠.约束屈曲支撑对K6型球面网壳减震效果的分析[J].甘肃科学学报,2007,19(1):122-126.
[8]朱彦鹏,张宪江.地震作用下约束屈曲支撑损伤量的数值分析[J].甘肃科学学报,2007,19(4):108-111.
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