特定限位U型软钢阻尼器设计与数值分析
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摘要
设计了一种特定限位U型软钢阻尼器,并以该阻尼器为单元设计了一种耗能装置,可在消能支撑、消能连接中使用,弥补了以往研究中缺少对U型软钢阻尼器屈曲失稳的解决办法,更加贴近于工程实际。首先对该阻尼器的结构进行了设计,然后应用有限元软件ANSYS对不同厚度和不同宽度的U型软钢阻尼器进行数值模拟,得到了各工况下该阻尼器的恢复力-位移滞回曲线。结果表明:本阻尼器力学性能良好,耗能强;其屈服前刚度随U型软钢板的厚度和宽度的增加而增大。经分析得出最大恢复力与位移荷载幅值的关系公式,且U型软钢板的厚较宽对阻尼器的出力影响更加明显。根据最大恢复力随U型软钢板的厚度及宽度变化的趋势,得到阻尼器力学模型计算公式,经验证,其效果良好。因此,在各类工程抗震结构中可依此计算公式选择相应尺寸的该阻尼器。
A special constrained U-shaped soft steel damper is designed in this paper, and a kind of energy dissipation device is designed by taking the damper as a unit, which can be used in energy dissipation support and energy dissipation connection. It makes up for that lack of solution to the buckling instability of the U-shape soft steel damper in the previous research and is more suitable for engineering practice. First, the structure of the damper is designed, then U-shape soft steel dampers with different thickness and different widths are numerically simulated by using the finite element software ANSYS. The hysteretic curves of the damper under various working conditions are obtained which show that the damper has good mechanical properties, strong energy consumption, the pre-yield stiffness increases with the increase of thickness and width of U-shaped soft steel plate. Through analysis, the relational formula between the maximum restoring force and the load amplitude of displacement is obtained, and the thickness of U-shaped soft steel plate has more obvious influence on the output of damper than the width. According to the trend that the maximum restoring force changes with the thickness and width of the U-shaped soft steel plate, the calculation formula which is proved to be effective of the damper mechanical model is obtained. Therefore, the corresponding size of the damper can be selected by this formula invarious engineering seismic structures.
A special constrained U-shaped soft steel damper is designed in this paper, and a kind of energy dissipation device is designed by taking the damper as a unit, which can be used in energy dissipation support and energy dissipation connection. It makes up for that lack of solution to the buckling instability of the U-shape soft steel damper in the previous research and is more suitable for engineering practice. First, the structure of the damper is designed, then U-shape soft steel dampers with different thickness and different widths are numerically simulated by using the finite element software ANSYS. The hysteretic curves of the damper under various working conditions are obtained which show that the damper has good mechanical properties, strong energy consumption, the pre-yield stiffness increases with the increase of thickness and width of U-shaped soft steel plate. Through analysis, the relational formula between the maximum restoring force and the load amplitude of displacement is obtained, and the thickness of U-shaped soft steel plate has more obvious influence on the output of damper than the width. According to the trend that the maximum restoring force changes with the thickness and width of the U-shaped soft steel plate, the calculation formula which is proved to be effective of the damper mechanical model is obtained. Therefore, the corresponding size of the damper can be selected by this formula invarious engineering seismic structures.
引文
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[9] 赵珍珍,张爱军,等. U型金属阻尼器的力学公式推导及阻尼性能研究[J]. 结构工程师,2017, 33(2): 144-150Zhao Zhen-zhen, Zhang Ai-jun, et al. Study on mechanics formula deduction and damping performance of U-shaped metal damper[J]. Structural Engineers, 2017, 33(2): 144-150(in Chinese)
[10] 杜红凯,韩淼,等. U型钢板力学性能受硬度和层数的影响分析[J]. 工程力学,2016, 33(S1): 101-106Du Hong-kai, Han Miao, et al. Mechanical properties analysis of U-shaped steel plates of different hardness and numbers of layers[J]. Engineering Mechanics, 2016, 33(S1): 101-106(in Chinese)
[11] 邓开来,潘鹏,等. 开槽U型金属屈服阻尼器横向性能试验研究[J]. 振动与冲击,2015, 34(12): 158-163Deng Kai-lai, Pan Peng, et al. Experimental study on lateral performance of slotted U-shaped steel damper[J]. Journal of Vibration and Shock, 2015, 34(12): 158-136(in Chinese)
[12] 李爱群,瞿伟廉.工程结构减震控制[M].北京:机械工业出版社,2007Li Ai-qun, Qu Wei-lian. Damping control of engineering structure [M]. Beijing: Machinery Industry Press, 2007(in Chinese)
[13] 徐赵东,赵鸿铁,等. 粘弹性阻尼结构的现代控制理论分析[J]. 西安建筑科技大学学报,2000, 32(2): 109-111Xu Zhao-dong, Zhao Hong-tie, et al. Theoretical analysis on modern control over the viscoelastic structure[J]. J. Xi ′an Univ. of Arch. & Tech, 2000, 32(2): 109-111(in Chinese)
[14] 王新敏. ANSYS结构分析单元与应用 [M]. 北京:建筑工业出版社,2011Wang Xin-min. Structural analysis unit and application in ANSYS [M]. Beijing: Building Industry Press, 2011(in Chinese)
[15] 孙训方,方孝淑,等. 材料力学 [M]. 北京:高等教育出版社,2009Sun Xun-fang, Fang Xiao-shu, et al. Mechanics of materials [M]. Beijing: Higher Education Press, 2009(in Chinese)
[2] 王奇,干钢. 基于线性化等效方法的消能减震结构有效附加阻尼比计算[J]. 建筑结构学报,2012, 33(11): 46-52Wang Qi, Gan Gang. Calculation of effective additional damping ratio of energy dissipation structure based on linear equivalent method[J]. Journal of Building Structures, 2012, 33(11): 46-52(in Chinese)
[3] Curadelli O, Amani M. Integrated structure-passive control design of linear structures under seismic excitations[J]. Engineering Structures, 2014, 81: 256-264
[4] 杨朋超,薛松涛,等. 地震动作用下消能构件的动力可靠度性分析[J]. 土木工程学报,2016, 49(S1): 115-130Yang Peng-chao, Xue Song-tao, et al. Dynamic reliability analysis of passive energy dissipation devices subjected to seismic excitations[J]. China Civil Engineering Journal, 2016, 49(S1): 115-130(in Chinese)
[5] 邹银生,陈敏,等. 黏滞阻尼器消能减震结构的简化设计[J]. 湖南大学学报(自然科学版),2005,32(6): 2-5Zhou Yin-sheng, Chen Min, et al. Simplified design method for energy dissipation systems using viscous dampers[J]. Journal of Hunan University (Natural Sciences), 2005,32(6): 2-5(in Chinese)
[6] 李广收,田雨. 金属阻尼器在剪力墙结构消能减震技术中的应用设计[J]. 建筑结构,2012, 42(S1): 452-455Li Guang-shou, Tian Yu. Engineering design of energy dissipation of shear-wall structure with metallic dampers[J]. Building Structure, 2012, 42(S1): 452-455(in Chinese)
[7] 杨明飞,徐赵东. 金属阻尼器的试验研究与应用[J]. 安徽理工大学学报(自然科学版),2014, 34(3): 2-5Yang Ming-fei, Xu Zhao-dong. Test research of the metal damper and its application[J]. Journal of Anhui University of Science and Technology (Natural Science), 2014, 34(3): 2-5(in Chinese)
[8] 周福霖,工程结构减震控制 [M]. 北京:地震出版社,1997Zhou Fu-lin. Engineering structure vibration-mitigation control [M]. Beijing: Seismological Press, 1997(in Chinese)
[9] 赵珍珍,张爱军,等. U型金属阻尼器的力学公式推导及阻尼性能研究[J]. 结构工程师,2017, 33(2): 144-150Zhao Zhen-zhen, Zhang Ai-jun, et al. Study on mechanics formula deduction and damping performance of U-shaped metal damper[J]. Structural Engineers, 2017, 33(2): 144-150(in Chinese)
[10] 杜红凯,韩淼,等. U型钢板力学性能受硬度和层数的影响分析[J]. 工程力学,2016, 33(S1): 101-106Du Hong-kai, Han Miao, et al. Mechanical properties analysis of U-shaped steel plates of different hardness and numbers of layers[J]. Engineering Mechanics, 2016, 33(S1): 101-106(in Chinese)
[11] 邓开来,潘鹏,等. 开槽U型金属屈服阻尼器横向性能试验研究[J]. 振动与冲击,2015, 34(12): 158-163Deng Kai-lai, Pan Peng, et al. Experimental study on lateral performance of slotted U-shaped steel damper[J]. Journal of Vibration and Shock, 2015, 34(12): 158-136(in Chinese)
[12] 李爱群,瞿伟廉.工程结构减震控制[M].北京:机械工业出版社,2007Li Ai-qun, Qu Wei-lian. Damping control of engineering structure [M]. Beijing: Machinery Industry Press, 2007(in Chinese)
[13] 徐赵东,赵鸿铁,等. 粘弹性阻尼结构的现代控制理论分析[J]. 西安建筑科技大学学报,2000, 32(2): 109-111Xu Zhao-dong, Zhao Hong-tie, et al. Theoretical analysis on modern control over the viscoelastic structure[J]. J. Xi ′an Univ. of Arch. & Tech, 2000, 32(2): 109-111(in Chinese)
[14] 王新敏. ANSYS结构分析单元与应用 [M]. 北京:建筑工业出版社,2011Wang Xin-min. Structural analysis unit and application in ANSYS [M]. Beijing: Building Industry Press, 2011(in Chinese)
[15] 孙训方,方孝淑,等. 材料力学 [M]. 北京:高等教育出版社,2009Sun Xun-fang, Fang Xiao-shu, et al. Mechanics of materials [M]. Beijing: Higher Education Press, 2009(in Chinese)