楼盖振动等效连续梁计算方法

Calculation method of equivalent continuous beam for floor vibration

介绍了采用等效连续梁模型模拟楼盖振动的基本原理和《多层厂房楼盖抗微振设计规范》(GB 50190—93)中频率密集区和位移系数等概念的理论基础及计算方法;对粘滞阻尼、滞变阻尼两种阻尼模式对计算结果的影响和理想铰、实际柱的支座形式对等效连续梁模型的自振特性和峰值位移的影响进行了分析。分析结果表明,采用等效连续梁模型模拟楼盖振动可简化计算,并可满足工程精度要求。

The basic principle of floor vibration simulation with equivalent continuous beam calculation model was introduced as well as theoretical basis and calculation methods of frequency-intensive area and displacement coefficient in Code for design of anti-microvibration of multistory factory floor（ GB 50190-93 ）. The effects of viscous damping and lag variable damping on calculation results were analyzed. The effects of the bearing form with ideal hinge and actual column on the natural vibration characteristics and peak displacement of equivalent continuous beam model were analyzed. The results show that the equivalent continuous beam model for floor vibration analysis makes calculation simple and can meet the accuracy requirements of the project.