在基于性能的抗震设计理论和方法的研究中，结构弹塑性地震反应分析方法和工具占有重要地位。本文为了检验弹塑性分析程序及所选计算模型的可靠性，借助一大型火电厂主厂房纵向框架—剪力墙结构试验模型及其结果，开展了评估研究。用Pushover 分析方法以及弹塑性动力分析方法对模型结构进行了理论分析计算，并与试验结果进行了较核。此外，本文还采用作者建议的一种简化抗震性能评估方法——改进能力谱方法对模型结构和原型结构进行了抗震性能评估，并与弹塑性时程分析结果进行了分析比较，证明了该方法的实用性。

本文对一幢在1985年墨西哥城大地震中受损的10层钢筋混凝土框架-剪力墙结构楼房建立起空间三维杆系分析模型，并在弹塑性滞回模型中考虑了钢筋混凝土构件的退化特性，输入结构原型附近场地实际加速度记录进行三维时程分析，通过与1/10 比例钢筋混凝土整体模型的三维振动台试验数据进行对比，验证了采用的弹塑性时程分析工具和振动台试验技术的有效性，讨论了其中需要进一步研究解决的问题。

文章对现有的几种评估建筑结构抗震性能的近似方法，其中包括推覆分析、能力谱方法等，进行了深入研究，就其中若干问题进行了讨论。在此基础上，提出了对能力谱方法的进一步改进。通过一典型结构的分析实例，初步证明了作者建议的方法简便有效，在基于结构性能的抗震设计中具有潜在的实用价值。

Current seismic design philosophy is changing from ‘safety’ to ‘performance’. The philosophy of the performance-based seismic design has also been implied in the newly updated seismic design code of China [1]. Nevertheless, its engineering application will depend on simplified methods for engineers to acquire the structural inelastic seismic response. The capacity spectrum method (CSM) based on the pushover analysis is one of the approximate approaches. In this paper, three improved CSMs proposed by Chopra and one substitute method suggested by the authors are used to evaluate the seismic performance of three types of building structures, which have same plane design but different column shapes - rectangular column frame, special-shaped column frame and short-leg shear wall structure, respectively. The results obtained are also compared with those of the inelastic dynamic analysis. In this way, the practicability and reliability of four simplified methods are checked and evaluated.

Case-study is carried out on a large-scale thermal power plant structure with and without energy dissipating bracing system. The plant is designed for construction in a region of high seismicity in China. The project is 8-story 40.77 meters high, 6-bay RC frame in the longitudinal direction. The seismic design proposed to add X-type steel bracing in the longitudinal frame and to adopt a new type of lead-alloy damper of energy-dissipation bracing system. The study is to carry out elastic and nonlinear time history analysis to variable levels of earthquake input so to provide the design with the information of the effectiveness of the damper installation. The paper presents the results of analytical evaluation on the longitudinal frame's seismic responses. In order to compare the damping effects of different installations, four structural models with and without bracing and dampers are used to conduct nonlinear dynamic response analysis subjected to three different levels of ground motion input, respectively. The peak acceleration levels correspond to the frequently occurred earthquake, moderate earthquake in seismic fortification intensity (in 8-degree area), and expected once in the lifespan the rare-intensive earthquake according to Chinese Code for seismic design of buildings [1]. The seismic performance of the four structural models is evaluated based on the analysis results (such as the vibration period, earthquake force, story shear force, floor displacements, dynamic amplification factors, etc). It is found that the installation of the lead-alloy dampers are effective to the steel bracing frame structure subjected to the rare-intensive earthquake and it reduces significantly the stress in the frame structure. Setting up the dual seismic resistant system, it can be effectively controlled the deformation of the frame structure and the damage of main structural elements. Based on the investigation, some suggestions are given in this paper towards the optimal structural design.

本文扼要介绍了计算机数值模拟钢盘混凝土结构地震反应及破损所涉及的非线性动力分析技术，包括结构振动分析模型的构成，单元分析模型及其恢复力模型的选择，逐步积分法的诮用及不平衡力的修正，地震反应的能量表达，典型的非线性动力分析程序等。最后列举了一个结构地震反应数值模拟的实例。

本文扼要介绍了近似评估结构弹塑性抗震性能的能力谱方法，并提出了一个计算简便、概念直观的改进方法。所列举的分析实例，证明了经改进的能力谱方法的实用性。

This paper presents the results from shaking table tests of a one-tenth-scale reinforced concrete (RC) building model. The test model is a protype of a building that was seriously damaged during the 1985 Mexico earthquake. The input ground excitation used during the test was from the records obtained near the site of the prototype building during the 1985 and 1995 Mexico earthquakes. The tests showed that the damage pattern of the test model agreed well with that of the prototype building. Analytical prediction of earthquake response has been conducted for the prototype building using a sophisticated 3-D frame model. The input motion used for the dynamic analysis was the shaking table test measurements with similarity transformation. The comparison of the analytical results and the shaking table test results indicates that the response of the RC building to minor and the moderate earthquakes can be predicated well. However, there is difference between the predication and the actual response to the major earthquake.

介绍了结构弹塑性地震反应中的能量反应方程的定义。阐述了在结构抗震工程中运用能量概念的意义，结合非线性动力时程分析。建立了多自由度体系能量项的实用计算方法。通过具体结构分析实倒，说明了能量分析方法在地震反应与破损评估研究中的应用价值。