浅谈BRB+黏滞阻尼器组合体系及其在云南地区应用
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摘要
结合云南省地方规定有控结构与无控结构位移角之比应小于0. 75的要求,介绍了BRB+黏滞阻尼器组合体系的优势和减震机理。以云南某项目为例,重点分析了该体系在地震作用下的性能。计算结果表明:BRB+黏滞阻尼器组合体系既可以有效控制位移角又可以降低地震作用;随着地震作用强度的增加,黏滞阻尼器的附加阻尼比减弱,能量法计算的附加阻尼比偏小,自由衰减法和规范方法计算结果接近。
Combined with rules in Yunnan province,the ratio of drift must be less than between controlled structural and uncontrolled structural,the advantages and damping mechanism of BRB + viscous dampers combination system were introduced. Based on a practical structure in Yunnan province,the performance of system was analyzed in earthquake.The result show that this system could work in both controlling drift and decreasing earthquake effect. The added damping ratio provided by viscous dampers would decrease with increasing earthquake effect. The result of energy method is small in added damping ratio,but it was proximate between code method and free damped vibration method.
Combined with rules in Yunnan province,the ratio of drift must be less than between controlled structural and uncontrolled structural,the advantages and damping mechanism of BRB + viscous dampers combination system were introduced. Based on a practical structure in Yunnan province,the performance of system was analyzed in earthquake.The result show that this system could work in both controlling drift and decreasing earthquake effect. The added damping ratio provided by viscous dampers would decrease with increasing earthquake effect. The result of energy method is small in added damping ratio,but it was proximate between code method and free damped vibration method.
引文
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[2]建筑消能减震技术规程:JGJ 297—2013[S].北京:中国建筑工业出版社,2013.
[3]周福霖,崔鸿超,安部重孝,等.东日本大地震灾害考察报告[J].建筑结构,2012,42(4):1-20.
[4]李爱群.日本东北大地震之隔减震建筑考察与思考[J].工程力学,2012,29(Ⅱ):69-78.
[5]陈思聪,周云. BRB+VD消能减震结构体系分析研究[J].建筑结构,2016,46(11):85-90.
[6]陈彦江,吴晓杰.自锚式悬索桥减震控制的试验研究[J].科学技术与工程,2017,17(28):264-268.
[7]丁洁民,吴宏磊.黏滞阻尼技术工程设计与应用[M].北京:中国建筑工业出版社,2016.
[8]建筑抗震设计规范:GB 50011—2010[S].北京:中国建筑工业出版社,2010.
[9]陈云.基于虚功原理布置屈曲约束支撑方法的研究[C]//第十届中国钢铁年会.上海:2015:1-5.
[10]巫振弘,薛彦涛,王翠坤,等.多遇地震作用下消能减震结构附加阻尼比计算方法[J].建筑结构学报,2013,34(12):19-25.