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| 1 | 地震激励下参数不确定的相邻建筑结构重叠分散保性能混合控制方法显示文摘研究阐述了具有不确定结构参数的两个相邻建筑物在地震激励下的混合控制方法。利用包含原理和具有保证性能控制算法的重叠分散控制策略,提出了一种不确定参数结构系统的重叠分散保性能混合控制算法。基于包含原理,将一个大尺度结构分为一组具有共同部分的成对子结构,其共同部分即重叠的部分。使用保性能算法设计每个成对子结构的控制器,然后利用收缩原理,形成原系统的控制器。将重叠分散保性能混合控制算法应用于具有不确定参数的12层和9层两个相邻建筑物的振动控制问题,并与集中的保性能振动控制方法进行了比较,两种方法下结构层间位移的最大控制率分别为50%~60%和60%~70%。数值结果表明:对于具有不确定结构参数的两个相邻建筑物,该方法可以有效地抑制结构的动力响应,确保控制系统稳定性,提高了控制器设计的灵活性和可靠性。 | 许庆虎 王建国 康小方 汪权 | 2017 | 应用力学学报2017，34，4： | 5 |
| 2 | 不规则消能减震结构的地震反应分析显示文摘本文运用有限元软件SAP2000,对不规则高层RC框架结构进行地震反应分析,分别计算原结构和布置粘弹性阻尼器的消能减展结构的自振周期、总位移、层间位移等,并进行对比分析。计算表明,消能减震结构在地震作用下总位移明显小于原结构的总位移,总位移降幅在50%-60%,层间剪力降幅在20%左右,从而达到明显的消能减震效果。 | 干洪 钱锡梅 周强 | 2018 | 安徽建筑大学学报2018，26，1： | 1 |
| 3 | The role of viscoelastic damping on retrofitting seismic performance of asymmetric reinforced concrete structures显示文摘The primary purpose of this research is to improve the seismic response of a complex asymmetric tall structure using viscoelastic(VE) dampers. Asymmetric structures have detrimental effects on the seismic performance because such structures create abrupt changes in the stiffness or strength that may lead to undesirable stress concentrations at weak locations. Structural control devices are one of the effective ways to reduce seismic impacts, particularly in asymmetric structures. For passive vibration control of structures, VE dampers are considered among the most preferred devices for energy dissipation. Therefore, in this research, VE dampers are implemented at strategic locations in a realistic case study structure to increase the level of distributed damping without occupying significant architectural space and reducing earthquake vibrations in terms of story displacements(drifts) and other design forces. It has been concluded that the seismic response of the considered structure retrofitted with supplemental VE dampers corresponded well in controlling the displacement demands. Moreover, it has been demonstrated that seismic response in terms of interstory drifts was effectively mitigated with supplemental damping when added up to a certain level. Exceeding the supplemental damping from this level did not contribute to additional mitigation of the seismic response of the considered structure. In addition, it was found that the supplemental damping increased the total acceleration of the considered structure at all floor levels, which indicates that for irregular tall structures of this type, VE dampers were only a good retrofitting measure for earthquake induced interstory deformations and their use may not be suitable for acceleration sensitive structures. Overall, the research findings demonstrate how seismic hazards to these types of structures can be reduced by introducing additional damping into the structure. | Zeshan Alam Chunwei Zhang Bijan Samali | 2020 | Earthquake Engineering and Engineering Vibration2020，19，1： | 0 |
| 4 | An alternative practical design method for structures with viscoelastic dampers显示文摘Viscoelastic dampers(VEDs) are one of the most common passive control devices used in new and retrofit building projects which reduce the structure responses and dissipate seismic energy during an earthquake.Various methods to design this kind of dampers have been proposed based on the desired level of additional damping,eigenvalue assignment,modal strain energy,linear quadratic regulator control theories,and other approaches.In the current engineering practice,the popular method is the one based on the modal strain energy that uses the inter-story lateral stiffness as one of the main variables for damper design.However,depending on the configuration of the structure,in some cases the resulting interstory lateral stiffness can be very large.Consequently,the dampers size would also be large producing much more damping than that effectively necessary,resulting in an increase of the overall cost of the supplemental damping system and causing excessive stress on the structural elements connected to the dampers.In this paper an alternative practical design method for structures with VEDs is proposed.This method uses the inter-story shear forces as one of the main variables to accomplish the damper design compared to what was done in previous studies.Nonlinear time-history analyses were conducted on a 7-story reinforced concrete(RC) structure to check the reliability and effectiveness of the proposed method.Comparisons on the seismic performance between the structure without dampers and that equipped with VEDs were carried out.It is concluded that the proposed method results in a very suitable size of dampers,which are able to improve the performance of the structure at all levels of earthquake ground motions and satisfying the drift requirement prescribed in the codes. | Joaquim Mimusse Tchamo Zhou Ying | 2018 | Earthquake Engineering and Engineering Vibration2018，17，3： | 0 |
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