目的 研究高强度钢材钢框架的受力性能和设计方法,以及与普通强度钢材钢框架相比的优越性.方法 以一个实际工程实例,利用PKPM软件分别对三种不同强度钢材(Q345、Q420、Q460)的钢框架进行设计,给出了设计结果,并对三种钢材框架结构的经济性和受力性能进行了对比.结果 随着钢材强度的提高,钢框架结构的自振周期增大,侧移和层间位移转角增大,可节约20％左右的用钢量和造价.结论 随着钢材强度的提高,可以提高钢框架的经济性,减小结构的地震作用,但同时高强度钢材钢框架在地震作用下,其主要的控制因素是层间位移.%In this paper,the mechanical behavior and design methods of high strength steel frames are studied, and the advantages of high strength steel frames over ordinary strength steel frames are discussed. By designing a practical steel fames with the software PKPM.the design results of steel fames,made of three different strength steel (Q345 ,Q420 and Q460) ,are compared in the mechanical behavior and the economical efficiency. It is showed that,with the increase of steel strength,the natural vibration period,the drift and the storey relative rotation angles of steel frames increase, while the total steel quantity and project cost decrease by about 20%. Thus it can be concluded that,with the increase of steel strength,the economical efficiency of steel frames increase and seismic responses of steel frames decrease, but inter-storey drift is the governing factor for the design of high strength steel frames.
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