一种四角钢组合约束型防屈曲支撑外围连接的设计方法研究:数值分析

发布时间：2018-06-22 19:34

本文选题：装配式 + 防屈曲支撑　；参考：《工程力学》2014年02期

【摘要】：与传统外围整体式防屈曲支撑不同的是,装配式组合防屈曲支撑的外围构件由多个组件通过连接件拼装而成,故外围连接的设计方法是此类防屈曲支撑构件设计理论的重要组成部分。针对一种四角钢组合约束型防屈曲支撑,已有适用于单向弯曲状态的外围连接螺栓内力的简化计算方法。但上述方法的适用性尚需经过精细有限元数值分析加以验证,并需进行适当修正,使其具有足够的计算精度,这是该文进行的研究工作之一。另外,由于内核构件与外围构件之间间隙的存在,防屈曲支撑构件更为常见的变形模式表现为双向弯曲变形,所以该文还将在单向弯曲状态所得到的螺栓内力计算公式的基础上进行进一步的组合,得到双向弯曲状态下的螺栓内力计算公式。该文最终给出了适用于四角钢组合约束型防屈曲支撑的外围螺栓连接的完整设计方法。
[Abstract]:Unlike traditional peripheral integral anti-buckling support, the assembled composite anti-buckling support peripheral member is composed of a plurality of components assembled through connectors. Therefore, the design method of peripheral connection is an important part of the design theory of this kind of buckling braced member. A simplified method for calculating the internal forces of peripheral connection bolts under unidirectional bending condition has been developed for a four-angle steel composite restrained anti-buckling bracing. However, the applicability of the above method needs to be verified by fine finite element numerical analysis, and it needs to be modified properly to make it have sufficient calculation accuracy. This is one of the research work in this paper. In addition, due to the gap between the core component and the peripheral member, the more common deformation mode of the buckle-resistant bracing member is biaxial bending deformation. In this paper, the formula for calculating the internal force of bolts in the state of biaxial bending is further combined on the basis of the formula for calculating the internal force of bolts in the state of unidirectional bending, and the formula for calculating the internal force of bolts in the state of two-way bending is obtained. This paper finally presents a complete design method of the peripheral bolt connections suitable for the four-angle steel combination restrained buckle-proof braces.
【作者单位】：清华大学土木工程系;
【基金】：国家自然科学基金项目(51178243)
【分类号】：TU318

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