Development of Seismic Isolation and Seismic Response Control Technologies for the Damage Control of Structures using Performance-Based Design

研究了隔震和地震反应控制技术在土木工程结构抗震性能中的应用。对二级地震的抗震性能要求进行了分析，并对应用隔震和地震反应控制技术的结构性能进行了研究，研究了隔震和地震反应控制技术的工程可行性和存在的问题。主要进行了以下几个方面的研究：(1)变阻尼系统对相邻结构半主动地震反应控制的验证。对比了传统的粘性阻尼控制、线性二次型控制以及新开发的伪负刚度控制三种控制方案，全尺寸试验结果表明，所提出的伪负刚度控制方案具有最佳的控制性能。(2)研究了减震器的试验性能评价方法，并对惯性力驱动减震器加载试验系统的有效性进行了研究。(3)研究了摩擦式隔震支座在桥梁结构隔震中的应用，并对该类隔震装置的建模进行了研究，以预测隔震桥梁结构的地震反应，重点是建立该类隔震支座的合理设计方法。(4)对既有大跨度桥梁进行了隔震和地震反应控制技术的抗震加固研究，实例分析表明，采用隔震和地震反应控制技术可以有效地改善既有大跨度桥梁的抗震性能。

Application of the seismic isolation and seismic response control technologies in order to ensure the required performance for the civil engineering structures is investigated. The analysis of performance requirement to resist the level-2 earthquakes and the study on the performance of structures with the application of seismic isolation and seismic response control technologies are conducted, and the engineering feasibility and issues in those technologies are studied. The research has been conducted in mainly the following topics:(1) Verification of semi-active seismic response control of adjacent structures using the variable damper system. Three types of control schemes, namely the conventional viscous damping control, linear quadratic control method, as well as the newly developed pseudo-negative stiffness control methods are compared, and the full-scale test results show that the proposed pseudo-negative stiffness control method gives the best control performance.(2) The experimental performance evaluation methods for the seismic dampers are investigated, and the effectiveness of the Inertia Force Driven Damper Loading Test system is investigated.(3) The use of friction-type bearing in the seismic isolation to bridge structures and the modeling of this type of isolation devices to predict the seismic response of isolated bridge structures are investigated, with the emphasis of establishing rational design methods for this type of isolation bearings.(4) Seismic retrofit of existing long-span bridges with seismic isolation and seismic response control technologies are investigated, and some case studies show that the improvement of seismic performance can be effectively achieved by using these technologies.