【摘要】 本市第二毛纺厂中南楼是一幢三层四跨的纯框架结构，它在１９７６年７月２８日的唐山地震中，结构遭受了严重的破坏．后经过加固，在同年的１１月１５日的宁河地震作用下，房屋全部倒塌．笔者利用平面杆系模型，对其结构进行弹塑性分析，以期得到影响该房屋倒塌的因素．更多还原

【Abstract】 Zhong Nan Building of Tianjin Second Woolen Mill is a R. C. frame structure of three stories and four spans. It was damaged seriously after Tangshan earthquake on 28th July,1976. Then it was strengthened and was thoroughly collapsed under the action of Ninghe earthquake on 15th Nov. 1976. Using the model of plane rod system, this paper gives a elastoplastic snalysis for the structure, and then finds the factors of affecting the collapse of the building.更多还原