平面索桁支承体系动力特性分析

Analysis of Vibration Characteristic of Complex Form Cable-Truss Supporting System

首先阐述了点式幕墙索桁支撑体系常用的布置方式及特点,给出动力特性分析的基本方法。针对平面索桁支撑体系,采用ansys程序对预应力及索、杆截面大小和长度等主要参数进行了系统分析,并求得了各参数与自振频率间的关系。这些结论对该种结构抗风、抗震设计及主次结构共振分析具有重要的指导意义。

This paper deals with the common use of layout patterns and behaviors of the dot-pattern glaze cable-truss supporting system and advances the basic analysis method of the vibration characteristics. For the analysis of plane form cable-truss supporting system, ANSYS program was adopted to exam the influences of parameters of pre-stress, cross-sections and lengths of cables and bars to the vibration characteristic systematically. The relationships between each parameter and self-vibration frequency are obtained. These conclusions are of guiding significance for anti-wind and anti-earthquake design of this structure as well as the analysis of the anti-resonance of main and sub-main structures.