高强混凝土结构的延性抗震设计

利用Ｍａｒｔｉｎｅｚ和Ｂｊｅｒｋｅｌｉ等人建议的高强约束混凝土的应力－应变关系，编写了弯矩－曲率关系的计算程序，并通过试验结果验算了计算模型的正确性，借助该分析模型对欧洲桥梁的抗震规范所规定的约束混凝土的最低含箍率进行评价，结果表明，本文所采用的应力－应变关系曲线及弯矩－曲率的计算方法可以用于高强混凝土柱的曲率延性分析，欧洲桥梁抗震设计规范所规定的最低含箍率同样适用于高强度混凝土结构的抗震设计。

The Seismic Ductility Design of High-Strength Concrete Structures

In this paper, based on the idealized stress-strain relation of the confined higher strength concrete suggested by Martinez & Bjerkeli, a calculating program of curvature ductility is written, and the analytical model is confirmed by comparing the test results with the analytical results. The minimum amount of the confining reinforcement requirement required by Eurocode 8(draft, April 1993) is introduced and evaluated by some calculating examples of curvature ductility of confined high--strength concrete sections. The results show that the minimum amount of the confining reinforcement required by Eurocode & can be applied to aseismic designs of ductility structures of high--strength concrete, and the used theoretical model of the stress -- strain and the written calculating program can be utilized in curvature ductility analyses of high--strength concrete column sections.