(1 江苏科技大学土木系，镇江212003;2 武汉市建筑设计院，430014)

［提要］将框架结构简化为鱼骨型模型，能够考虑框架横梁刚度对结构性能的影响，是一种合理的简化方法。基于静态缩合方法，推导了鱼骨形模型结构刚度矩阵的解析式，通过算例提出了实际单跨平面框架结构和鱼骨型振动模型之间的线刚度转化关系。例题分析表明，提出的模型能够模拟结构的实际地震反应，计算精度满足工程要求。

［关键词］鱼骨型振动模型；非线性静力分析；平面框架；时程分析

Study on Simplified Method of Planar Frame to Fishbone-shaped Vibration Model/Pei Xingzhu1,Zhou Xiaosong2(1 Department of Civil Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China; 2 Wuhan Designing Institute,Wuhan 430014,China)

Abstract:The fishbone-shaped model can be used to simplify the frame structure considering the influence of the beam rigidity on the structure system. Based on the static condensation method, the structural rigidity matrix is derived. The line rigidity transferring relation between the single span planar frame and the fishbone-shaped vibration model is presented. The analysis results show that the suggested model can simulate the structure earthquake response and the precision meets the engineering requirement.

Keywords:fishbone-shaped vibration model; nonlinear static analysis; planar frame; dynamic analysis