共查询到18条相似文献,搜索用时 46 毫秒
1.
组合钢板耗能器—一种新型耗能减震装置 总被引:7,自引:0,他引:7
本文在吸收普通钢板耗能器和Pall摩擦耗能器优点的基础上提出了组合钢板耗能器,建立了相应的力学分析和计算模型;通过地震反应分析检验了其减振效果,并与普通钢板耗能器进行了对比。研究结果表明,组合钢板耗能器是一种构造简单,耐久性好,减效果和经济效果俱佳的抗震效果,具有广阔手应用前景。 相似文献
2.
本文讨论了随机等价线性化方法(ESL)作为一种对考虑力学参数随机性的非线性滞回结构进行可靠性分析的工具具有的灵活性,这种方法还被推广用来处理由于重力荷载的影响导致滞回曲线非对称引起的零平均输入非零平均输出的响应过程,利用此方法分析了一座按8度要求设计的钢筋混凝土规划框架结构和不规则框架,本文提出的方法可以分析范围更广泛的问题。 相似文献
3.
4.
一种新型抗震耗能剪力墙结构—结构的抗震性能研究 总被引:3,自引:0,他引:3
本文根据两个十层新型抗震耗能剪力墙结构模型的振动台试验结果,研究了这种结构的地震反应、变形特性和耗能机理、提出了进行非线性地震反应分析的计算模型,并与试验结果进行了对比,在此基础上进行了参数研究,分析了结构主要参数的变化对抗震性能的影响。 相似文献
5.
6.
耗能减震技术研究及应用的新进展 总被引:18,自引:5,他引:18
本文总结了耗能减震技术近年来的研究与应用情况,主要包括各种新型耗能减震装置的原理、性能及应用。文中介绍了有关国家耗能减振技术标准发展的情况,提出了该项技术今后应加强研究的若干问题,并预测了其发展前景。 相似文献
7.
将结构前两阶振型各自等效为单自由度,采用模态pushover分析确定各等效单自由度的屈服强度系数和延性系数,然后由反应谱计算各阶振型耗散能量需求,利用各振型能量分布曲线,求得各层耗散能量需求,叠加得到各层地震总能量需求,据此确定耗能装置的类型及设计参数.运用该方法对9层钢框架进行了设计,并通过非线性动力分析进行了验证,结果表明该方法精确度符合实际工程需求. 相似文献
8.
9.
耗能减震结构的抗震设计原则与设计方法 总被引:10,自引:0,他引:10
根据国内外耗能减震器和耗能减 研究成果,结合我国正在修订的建筑结构抗震设计规范,提出了耗能减震结构的实用抗震设计方法。 相似文献
10.
基于MPA方法的结构滞回耗能计算 总被引:2,自引:0,他引:2
在能量反应分析中,滞回耗能是最具明确工程意义的而又便于工程应用的能量指标,可用以衡量结构的塑性累积损伤。然而,以往研究中,在计算多自由度体系的滞回耗能时,通常采用时程分析法,计算比较烦杂,不利于工程实际的应用。因此,本文提出了一种采用模态pushover分析(MPA)计算多层结构滞回耗能的简便方法,并通过两个高层结构算例,验证了该方法的精度。结果表明:基于模态pushover分析的结构滞回耗能计算方法精度良好,结果可靠;对于框架结构,可以直接采用第一阶模态(倒三角)加载模式对结构进行pushover分析计算,对于高层框架剪力墙结构,必须组合高阶模态的滞回耗能计算结果。 相似文献
11.
This paper presents qualitative investigations on the energy behaviour of structures into which hysteretic dampers are incorporated. Emphasis was given to the ratio of the structural stiffness after the yielding of hysteretic dampers to the initial elastic stiffness, with a premise that this ratio, termed α in this study, tends to be large for structures with hysteretic dampers. Structures concerned were represented by discrete spring–mass systems having bilinear restoring force behaviour, in which the second stiffness relative to the initial stiffness is α. It was found that with the increase of α the total input energy tends to increase, but the increase is confined to a narrow range of natural periods. Both the total input energy and hysteretic energy were found to become less sensitive to the yield strength with the increase of α. A simple formula was also proposed to estimate the maximum deformation given the knowledge of the hysteretic energy. Analysis of MDOF systems revealed that, even when α is large, the total input energy and hysteretic energy for MDOF systems are approximately the same as those of the equivalent SDOF system, and the hysteretic energy can be distributed uniformly over the stories if α is large. 相似文献
12.
随机结构分析的扩阶系统方法(Ⅱ)——结构动力分析 总被引:3,自引:0,他引:3
李杰 《地震工程与工程振动》1995,(4)
本文论述随机结构系统在确定性时程激励下的分析方法。文中提供的扩阶系统动力方程的一般公式,适用于同时具有随机质量、随机阻尼、随机刚度参数的多自由度动力系统。文中并对此扩阶动力方程建议了基于线性加速度假定的递归聚缩算法。 相似文献
13.
采用耗能减震装置修复震后有损伤钢筋混凝土框架的试验研究 总被引:3,自引:1,他引:3
本文通过地震模拟振动台试验研究用耗能减震装置修复后震后有损伤钢筋混凝土框架的效果和可行性,文中制作了两层和三层两座钢筋混凝土剪切型框架,首先进行了地震损伤模拟试验,其次提出了震后有损伤结构的参数识别方法,修复准则和修复用耗能减震装置的设计准则;在此基础上,采用了软钢屈服型耗能器驿两座试验框架在地震损伤后进行修复,并再次对修复后的框架模型进行地震模拟试验,证实了采用这种修复措施可以恢复震后有损伤结构 相似文献
14.
可控消能减震原理及结构分析 总被引:3,自引:0,他引:3
阎兴华 《地震工程与工程振动》1997,17(3):66-72
本文介绍一种新的减震结构体系及其分析方法。这种结构体系的减震系统由控制装置及耗能装置组成,控制装置根据结构反馈的相关信号,在回头点处启动耗能装置,耗散大量地震能量,属于半主动控制范畴。试验及理论分析表明,这种结构体系的减震效果良好,能够将结构的地震位移反应降低50%以上。本文介绍了这种结构体系的减震工作原理、数学模型、理论分析方法及算例,并给出了相应的结论。 相似文献
15.
本文提出了抗震耗能剪力墙结构的新型式,新型剪力墙的墙板中人为地设置了竖缝,并在竖缝中设置各种型式的耗能装置来控制结构的动力性能,如:结构的侧向刚度、延性、自振频率等,为了验证这一设想,本文进行了两个10带层竖缝剪力墙模型的振动台试验,通过试验数据分析和结构非线性动力反应计算分析对两个模型的抗震性能进行了研究。 相似文献
16.
Most real-life structural/mechanical systems have complex geometrical and material properties and operate under complex fuzzy environmental conditions. These systems are certainly subjected to fuzzy random excitations induced by the environment. For an analytical treatment of such a system subjected to fuzzy random excitations, it becomes necessary to establish the general theory of dynamic response of a system to fuzzy random excitations. In this paper, we extend the work published in Reference [1], and discuss the case of Multi-Degree-of-Freedom (MDF) fuzzy stochastic dynamical systems. The theory of the response, fuzzy mean response and fuzzy covariance response of multi-degree-of-freedom system to fuzzy random excitations in the time domain and frequency domain is put forward. Two cases to determine the fuzzy response statistics of the fuzzy stochastic dynamical system with multiple degrees of freedom are discussed. Two examples are considered in order to demonstrate the rationality and validity of the theory. © 1997 by John Wiley & Sons, Ltd. 相似文献
17.
Most real-life structural/mechanical systems have complex geometrical and material properties and operate under complex fuzzy environmental conditions. These systems are certainly subjected to fuzzy random excitations induced by the environment. For an analytical treatment of such a system subjected to fuzzy random excitations, it becomes necessary to establish the general theory of dynamic response of a system to fuzzy random excitations. In this paper, the theory of response, fuzzy mean response and fuzzy covariance response of a single-degree-of-freedom (sdf) system to fuzzy random excitations in the time domain and frequency domain is put forward. The theory of response analysis of an sdf system to both stationary and non-stationary fuzzy random excitations in the time domain and frequency domain is established. Two examples are considered in order to demonstrate the rationality and validity of the theory, and the models of stationary filtered white noise and non-stationary filtered white noise fuzzy stochastic processes of the earthquake ground motion are set up. Methods of analysis for fuzzy random seismic response of sdf systems are put forward using the principles of response analysis of an sdf fuzzy random dynamic system. 相似文献
18.
本文通过一座三层的耗能-隔震柔性底层钢管混凝土结构模型和一座三层普通钢筋混凝上结构模型的振动台实验,着重研究了耗能-隔震柔性底层钢管混凝上结构的抗震性能和减震效果,并与普通的钢筋混凝土结构的实验进行了分析比较,研究了两种结构体系在地震作用下的耗能分布和地震累积损伤情况。实验结果表明,耗能-隔震柔性底层能够有效地吸收地震输入的大部分能量,防止和减小了上部结构的地震破坏.文中还讨论了耗能-隔震柔性底层结构中钢管混凝土柱与橡胶隔震器之间的轴力分配以及在水平变形下的稳定性问题. 相似文献