高层钢框架结构变形控制设计方法研究

Research on Deformation Control Design Method of High-rise Steel Frame Structures

目的改进现阶段基于承载能力极限状态分析法应用在高层钢结构设计中的不足.方法选取二阶效应参数c、结构高宽比H/L、框架柱长细比λ和梁柱总线刚度比KZ等参数对单跨12层钢框架结构1B12F及双跨32层钢框架支撑结构2B32F进行工况设计与参数分析.结果由滞回曲线结果看出,对于不同参数的钢框架结构,其一层柱顶的滞回曲线均为饱满的梭形.对于1B12F钢框架结构及2B32F钢框架支撑结构,在荷载达到一级加载制度的峰值时,结构柱顶水平侧移与层间相对侧移均已经超过了规范的位移容许值.结论对于钢框架结构以及弱支撑的钢框架支撑结构,在低周往复荷载作用下刚度退化迅速,由于其侧向刚度较低,框架的侧移超过了正常使用极限状态的位移容许值,其抗震设计应由位移作为控制标准.

The main purpose of this paper is to improve based on bearing capacity limit state analysis method used in the current lack of high-rise steel structure design.The test method is based on the second-order effect parameter c,The structure aspect ratio H/L,The frame column slenderness ratio λ and Beam-column bus stiffness ratio K_Z can be used by the design and parameter analysis from twelve to thirty layer of steel frame structure and from 1B to 2B of working condition of steel framework-support structure.The research has been seen by the hysteresis curve,one layer of steel frame structure for different parameters are pillars of hysteresis curve are for the spindle,and are relatively full,in addition,the 1B12F and 2B32F steel frame structure and steel frame supporting structure when the load reached the peak of my level of loading system,the structure of the pillars and lateral layer between the relative displacement of the lateral has exceeded the standard tolerance value conclusion for steel frame structure and weak support steel frame supporting structure,the stiffness degradation under lowcycle reciprocating load quickly,due to its lowlateral stiffness,the framework of lateral more than the allowable displacement of normal use limit state,thus for high soft steel frame structure and steel frame supporting structure with weak support,its seismic design should be determined by the displacement as control standard.Also has been clear about the scope of application of direct analysis method based on displacement control,which are verified by an example with displacement as the control design method based on the direct analysis of applicability.