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土木工程结构振动控制的研究进展 总被引：21，自引：2，他引：21
综述了近年来土木工程结构振动控制领域的研究进展和发展现状，指出了其发展前景和有待解决的问题，并介绍了主要变刚度阻尼控制系统的工作原理和组成。 相似文献
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土木工程结构健康诊断中的统计识别方法综述 总被引：11，自引：1，他引：11
本文对土木工程结构健康诊断中的统计识别方法进行了综述。对统计识别中的统计系统识别方法(Bayes模型修正、随机有限元模型修正)、统计模式识别方法和概率神经网络方法的基本理论及其在土木工程结构健康诊断中的研究现状进行了论述，在此基础上提出了土木工程结构健康诊断中统计识别方法需要解决的关键问题和研究发展方向。 相似文献
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本系统讨论了土木工程结构的主动控制和混合控制设备的构造和性能及其实际应用的效果；对一般非线性优化控制方法及其效用做了分析介绍；对当前土木工程结构控制研究中存在的困难和问题以及今后的发展趋势进行了分析讨论和展望。 相似文献
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在过去的20年里，近场问题受到了地震学家和土木工程师的共同关注，一方面原因旨在阐明地震本身的机理，解释新现象；另一方面是由于地震动作为一种主要的输入荷载，在某些情况下将对整个结构设计的最终结果起到控制作用. 同时试验和评估等其它领域的相关研究也均以指定的荷载形式为前提，荷载形式的变化直接影响了土木工程中的诸多方面，所以希望研究这种荷载的规律并获得其与结构反应之间的关系. 本文回顾了近场问题研究的历史，介绍了近年来国内外针对近场地震动所展开的相关研究工作，其中包括近场地震动本身的特性与近场地震动对土木工程结构的影响等方面，指出了目前存在的问题和进一步应该研究的方向，对于近场问题的深入研究具有一定的参考价值. 相似文献
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土木工程结构安全性评估、健康监测及诊断述评 总被引：106，自引：6，他引：106
阐述了土木工程结构的安全性评估、健康监测及损伤诊断的必要性和迫切性，系统论述了结构健康监测和诊断的概念、理论和方法，重点讨论了传感器的优化布置、损伤识别等健康监测中的关键问题，介绍了光纤等新型传感器的应用情况，最后指出了值得进一步研究的问题。 相似文献
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智能结构控制发展综述 总被引：48，自引：7，他引：41
本文介绍了智能结构的基本概念和基本特点,并对智能结构控制理论的形成和发展进行了综合论述;重点阐述了在土木工程结构控制中应用较成功的人工神经网络和模糊逻辑的理论和应用的现状,提出了今后应重点解决的问题。 相似文献
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深圳市民中心屋顶网架结构支撑钢牛腿瞬时应力场的识别 总被引：6，自引：2，他引：6
结构健康智能监测是当前国内外土木工程界新的研究热点和难点，具有重要的理论和工程应用价值。本文以深圳市民中心屋顶网架结构的智能监测系统为实际应用背景，系统地阐述了网架结构支撑钢牛腿基于神经网络的瞬时应力场识别方法及关键点工作状态评估与多级报警的方法。 相似文献
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智能控制算法及其在结构振动控制中的应用 总被引：6，自引：0，他引：6
本文首先概述了智能控制理论的形成、发展及主要内容，其中着重介绍了智能控制领域中的三个研究热点：模糊逻辑、神经网络、遗传算法的研究现状和发展方向；其次，详细地介绍了近年来智能控制算法在结构控制上的进展和应用，指出智能控制算法的研究是土木工程结构振动智能控制的重要组成部分，并对其研究和应用发展趋势进行了展望。 相似文献
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基于市场机制结构控制策略的研究和应用进展 总被引：5，自引：0，他引：5
半主动控制装置以其廉价、耗能低及控制稳定性好的优势成为目前结构控制领域的研究热点,由此势必产生具有大量半主动控制装置形成的复杂的结构控制系统,但足对于由大量半主动控制装置组成的结构控制系统,其形式非常复杂。相比于传统的集中式控制策略,分布式控制策略更适应此类复杂系统的控制要求。而基于市场机制的控制策略（Market-basedControl,简称MBC）属于分布式控制策略,它利用市场来模拟复杂的控制系统,用销售商和消费者来代替控制器和能源输出,从而将整个控制系统离散化,利用自由市场经济对有限资源合理分配的特点,对结构的振动实施高效的控制。介绍了分布式控制的概念,回顾了基于市场控制理论的发展过程,重点介绍丁其在土木工程领域的应用,存在的问题及未来发展方向。 相似文献
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Considerable effort has been devoted to develop passive and active methods for reducing structural response under seismic excitations. Passive control approaches have already found application in practice. Active control methods, on the other hand, are being vigorously examined for application to civil structures. This paper investigates the application of active and semi-active control schemes to structures subjected to seismic excitations, and it focuses on the use of the sliding-mode control approach for the development of the control algorithms. The possibility of control redundancy with respect to the number of sliding constraints is taken into account in the controller design. Several sets of numerical results are obtained for a realistic 10-storey shear building, subjected to earthquake-induced ground motions and controlled by active or semi-active control schemes. It is observed that both active and semi-active control schemes can be used to reduce the dynamic response. Active control performs very effectively in reducing the structural response, but the required control force values can be quite large to limit its practical application in the case of large and massive buildings. Active regulation of linear viscous dampers was found unnecessary for this type of structural system, as it did not induce any significantly more reduction in the response than the dampers acting passively. On the other hand, it is shown that active regulation of stiffness can be used with advantage to reduce the response. © 1997 by John Wiley & Sons, Ltd. 相似文献
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结构控制技术在桥梁工程中的应用综述 总被引：1，自引：0，他引：1
就桥梁结构的被动控制和主动控制以及控制算法等三方面,系统综述了桥梁工程中振动控制技术的应用现状与进展,总结了桥梁结构主、被动控制所取得的一些研究成果和结论,同时,指出目前研究工作中存在的尚待进一步完善的问题,提出了今后的研究方向。 相似文献
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In a real-time hybrid simulation, a transfer system is used to enforce the interface interaction between computational and physical substructures. A model-based, multilayer nonlinear control system is developed to accommodate extensive performance variations and uncertainties in a physical substructure. The aim of this work is to extend the application of real-time hybrid simulation to investigating failure, nonlinearity, and nonstationary behavior. This Self-tuning Robust Control System (SRCSys) consists of two layers: robustness and adaptation. The robustness layer synthesizes a nonlinear control law such that the closed-loop dynamics perform as intended under a broad range of parametric and nonparametric uncertainties. Sliding mode control is employed as the control scheme in this layer. Then, the adaptation layer reduces uncertainties at run time through slow and controlled learning of the control plant. The tracking performance of the SRCSys is evaluated in two experiments that have highly uncertain physical specimens. 相似文献
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Base isolated structures have been found to be at risk in near-fault regions as a result of long period pulses that may exist in near-source ground motions.Various control strategies,including passive,active and semi-active control systems,have been investigated to overcome this problem.This study focuses on the development of a semi-active control algorithm based on several performance levels anticipated from an isolated building during different levels of ground shaking corresponding to various earthquake hazard levels.The proposed performance-based algorithm is based on a modified version of the well-known semi-active skyhook control algorithm.The proposed control algorithm changes the control gain depending on the level of shaking imposed on the structure.The proposed control system has been evaluated using a series of analyses performed on a base isolated benchmark building subjected to seven pairs of scaled ground motion records.Simulation results show that the newly proposed algorithm is effective in improving the structural and nonstructural performance of the building for selected earthquakes. 相似文献
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分散控制与集中控制策略相比可以提高结构控制系统的可靠性。文中将分散控制和滑移模态控制算法原理相结合,导出分散滑移模态控制(decentralized sliding mode control,DSMC)算法并应用于高层结构振动控制中。该方法是将结构分解为若干个子结构,分别进行滑移模态控制。文中以某20层钢结构Benchmark模型为例,分别进行3个子结构与4个子结构的分散控制数值计算,与线性二次型最优控制(Linear quadratic optimal control,LQR)效果相比,DSMC算法可以有效地抑制结构位移和加速度反应。 相似文献
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Sine sweep and earthquake excitation tests have been performed on a one-story spatial steel frame building equipped with two
identical semi-active assemblies described and fully characterized in a companion paper. The tests allowed identifying and
validating simple mathematical models of the building in its passive configurations as well as in semi-active operation according
to an energy storing and suddenly dissipating algorithm. In order to eliminate or at least attenuate the detrimental effects
of control delays due to adopted software, electronic apparatus and mechanical inertia of variable dampers' moving parts,
a simple ‘sine-fit’ prediction method was conceived, evaluated and adopted in subsequent tests. It is shown that, with adequate
anticipation of device operation, the selected control algorithm produces a satisfactory reduction of building response compared
to that obtained in passive configurations, with overall system efficiency practically independent of the earthquake input
and related only to the properties of the semi-active assembly.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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Design approaches for active, semi-active and passive control systems based on analysis of characteristics of active control force 总被引：1，自引：0，他引：1
In this paper,the characteristics of forces in active control systems connected to adjacent levels of a building are analyzed.The following characteristics are observed:(1) active control can provide signifi cantly superior supplemental damping to a building,but causes a small frequency shift;(2) the linear quadratic regulator(LQR)-based control force is composed of an elastic restoring force component and a damping force component,where the damping force is almost identical to the total control force,howev... 相似文献
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双向偏心结构扭转耦联地震反应的序列最优控制 总被引：1，自引：0，他引：1
本文分析了不对称建筑结构平移-扭转耦联振动的动力特性及地震作用下的响应;根据地震动输入结构的过程,推导出一种更为一般的最优控制算法,所获得的控制力表达式同时包括地震响应和地震激励。通过对一非规则四层框架结构的扭转耦联地震反应控制分析表明,该算法不仅能有效地控制结构的平移地震反应,而且更有效地抑制结构的扭转耦联地震反应。 相似文献