Based on the visual graphical procedure of capacity spectrum method (CSM), a new method, called capacity-demand curves method (CDCM), is proposed for performance/displacement seismic design in this paper. The new method can be drawn from CSM but could avoid its disadvantages in difficult determination of demand point and larger error induced for long period system. Then the method is developed to determine the seismic performance/displacement including damage degree of structures and the corresponding probability under multiple earthquake hazard levels. All the procedures are presented in illustrative format which are easy to be understood and the values are easy to be determined. The demand curves, reflecting the relations of elastic and inelastic response, are based on the suggestion of R-μd relations in previous studies, and comparison of different models is discussed.

本文从结构抗震设计方法的发展历史，总结了结构抗震性能与结构抗震能力的关系，以及抗震性能指标之间的关系，建议以承载力和能综合反映结构滞回耗能和损伤的等效延性系数（位移）作为抗震性能设计指标。随后又进一步讨论了抗震设防水准与结构抗震性能需求之间的关系。根据能力设计方法的概念，研究了具有多道抗震防线结构的性能、抗震设防水准和地震位移反应模式，指出将多道抗震防线概念、能力设计方法与位移模式结合的基于性能/位移抗震设计方法，可更易把握结构的抗震性能和性能目标的确定，从而易于实现基于性能／位移抗震设计方法。

Seven specimens were tested to investigate shear strength of reinforced concrete columns strengthened by wrapping carbon fiber reinforced plastic sheet. All specimens were tested under lateral reversal cyclic loading and a constant axial load. The main parameters considered were CFRP sheet amount, shear span/depth ratio and axial load ratio. Many strain gauges were attached to CFRP sheet to obtain its shear contribution. It was found that the shear behavior of RC part of the strengthened column was almost the same as that of the unstrengthened one. The parameters were found to have an influence on the shear contribution of CFRP sheet, which could be explained by truss-arch shear resistance mechanism. A simple superposition method is suggested to calculate the shear strength of the strengthened column, in which a shear coefficient (ν) is proposed to evaluate the shear contribution of CFRP sheet based on the test results. The calculated results of suggested method are shown to be in reasonable agreement with test ones.

本文根据近年来国内外高强混凝土的研究成果，总结了高强混凝土有关强度指标的换算关系，建议了用于正截面承载力计算的高强混凝土受压应力-应变曲线。采用所建议的关系和曲线分析了高强混凝土构件的正截面承载力，提出了应力-应变曲线参数的取值。在此基础上，进一步给出了等效矩形应力图形系数。

本文根据国内外对钢骨混凝土结构的研究，介绍了钢骨混凝土结构的发展和特点，钢骨与混凝土的共同工作，梁、柱构件的正截面和斜截面受力性能、刚度和裂缝、抗震性能及其有关计算理论，梁柱节点的受力性能和适合我国工程应用的梁柱节点连接构造形式及试验研究，还介绍了钢骨混凝土结构在我国的工程应用情况。