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为了便于计算V形偏心支撑钢框架结构体系的层间侧移与耗能连梁转角,更好地理解V形偏心支撑受力特点,基于结构力学基本假定,给出其在侧向力作用下的耗能连梁剪力和支撑轴力计算式;依据侧向位移拆分原则,利用连梁剪力和支撑轴力表达式,推导出V形偏心支撑结构的弹性抗侧刚度,通过30个算例对比说明,抗侧刚度算式有较高的精度;在V形偏心支撑结构弹性内力分析的基础上,对比GB 50017—2003《钢结构设计规范》,对支撑杆件的设计提出新的建议;基于虚功原理和小变形假定:当已知外力分布时,依据偏心支撑达到极限状态时的典型屈服机制,推导出V形偏心支撑极限承载力算式,利用SAP 2000对10层算例进行推覆分析,验证极限承载力计算式。
In order to facilitate the calculation of the inter-story lateral displacement and the energy-consuming connecting beam angle of the V-shaped eccentrically supported steel frame structural system and to better understand the force characteristics of the V-shaped eccentric support, based on the basic assumptions of the structural mechanics, its lateral force is given. The energy dissipation beam shear force and the support axial force calculation formula; According to the lateral displacement splitting principle, using the expression of the coupling beam shear force and the support axial force, the elastic anti-side stiffness of the V-shaped eccentric support structure is deduced, through 30 The comparison of examples shows that the anti-side stiffness formula has higher accuracy; based on the analysis of the elastic internal force of the V-shaped eccentric support structure, the GB 50017-2003 “Steel Structure Design Code” is compared with new recommendations for the design of the support bar. Based on the principle of virtual work and small deformation assumption: When the external force distribution is known, according to the typical yield mechanism when the eccentric support reaches the limit state, the ultimate bearing capacity formula of the V-shaped eccentric support is deduced, and the SAP2000 is used to push the 10-story calculation example. Overlay analysis to verify the formula for ultimate bearing capacity.