A performance-based design method for high-rise buildings using reduction and inverse expansion of frame models

本研究的目的是开发一个合理实用的计算机辅助结构设计系统，以最大限度地提高结构工程师的效率，适用于高层建筑（包括具有被动阻尼器的建筑）。本文的主要研究成果包括：(1)提出了一种具有橡胶隔振器和粘性阻尼器的三维建筑框架的优化设计方法。提出的优化设计方法的基本思想是将剪力框架模型扩展为由梁单元组成的全框架模型。这是将普通结构设计中常用的全框架模型简化为共享框架模型的一种逆方法。(2)将日本2000年修订的建筑规范中引入的“响应和极限强度计算”作为去年开发的建筑结构优化设计方法进行了扩展，考虑了地表响应放大的影响。(3)针对具有非单调位移谱的设计地震，提出了一种新的抗剪结构刚度设计方法。目标函数是代表“成本”的基本自然周期和代表“性能”的最大位移水平的组合，它被引入到设计方法中，以找到响应约束下的一组层刚度。我们进一步扩展了这种方法，使其可以处理多个设计地震。

The purpose of this research is to develop a rational and practical computer aided structural design system, which is intended to maximize the efficiency of structural engineers, for high-rise buildings (including those with passive dampers). The main results of our research include:(1) We have proposed an optimum design method for a 3D building frame having lubber isolators and viscous dampers at a mid story. The basic idea behind the proposed optimum design method is to expand a shear frame model to a full frame model composed of beam elements. This is an inverse approach to the reduction of the full frame model to the share frame model, which is often used in ordinary structural design.(2) We have extended the optimum design method developed last year for building structures based on "the calculation of response and limit strength," which was introduced in the Japanese building code-revised in 2000, by taking into account the effect of response amplification in the ground surface.(3) A new stiffness design method has been developed for shear buildings subject to a design earthquake with non-monotonic displacement spectrum. The objective function that is a combination of the fundamental natural period which represents 'cost' and the level of the maximum displacements which represents 'performance' is introduced into the design method to find a set of story stiffness under response constraints. We have further extended this method so that it can deal with multiple design earthquakes.