延性比概念在人防设计中的应用

Application of the Ductility Ratio in Designing Civil Air-Defence Construction

文章首先论述延性比在人防结构设计中的作用,得出等效静载与延性比成反比关系;然后对常用的一种主次梁结构在人防荷载作用下进行估算,提出让次梁中部率先出现塑性铰,从而形成一种大板块的屈服模式,可以缓和主梁承受的剪力,提高它的安全度。

The importance of the ductility ratio in designing civil air-defence construction is illustrated,and the inverse ratio relationship of equivalent static load and ductility ratio is deduced.By analysizing a normal beam-slab structure under the force of air-defence structure,a new design method is proposed to allow plastic hinge firstly be formed in the secondary beam so as to engender the big plate plastic model.In application of that,the shear force of primary beam is reduced,then the safty degree of the structure is improved.