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一、前言辽南和唐山地震的震害调查表明,高低跨单层铰接排架厂房,受高振型影响是很突出的,主要表现在高低跨交接处柱截面的断裂或牛腿的竖向劈裂.但此种高低跨排架的高振型计算是很繁杂的,因此《工业与民用建筑抗震设计规范》(TJ11-78)中提供了一个计算高低跨单层铰接排架动力特性的简化方法.此法是在分析了204栋厂房的内力后取得的,其中有144栋为二自由度体系,60栋为三自由度体系.进一步研究表明,当
I. Preface Earthquake damage investigations in the earthquakes in southern Liaoning and Tangshan indicate that high and low span single-story articulated and trussed powerhouses are highly affected by high vibration modes. They are mainly manifested in fractures at the cross section of the high and low cross sections or vertical Cracking. However, the calculation of the high vibration mode of this type of high and low straddle is very complicated. Therefore, the “Code for Seismic Design of Industrial and Civil Buildings” (TJ11-78) provides a method for calculating the dynamic characteristics of a single-layer articulated bent frame with high and low spans. Simplified method. This method was obtained after analyzing the internal forces of 204 buildings, of which 144 were two degrees of freedom and 60 were three degrees of freedom. Further studies showed that when