装配式建筑双槽钢组合截面梁整体稳定系数研究  

GLOBAL STABILITY COEFFICIENT OF PREFABRICATED BEAMS WITH DUAL-CHANNEL COMBINED SECTION

作　　者：张爱林[1,2] 郭志鹏[1] 刘学春[1,2] 李超 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]北京工业大学北京市高层和大跨度预应力钢结构工程技术研究中心,北京100124

出　　处：《工程力学》2018年第2期67-75,共9页Engineering Mechanics

基　　金：国家自然科学基金项目(51678010);北京市自然科学基金重点项目(8131002)

摘　　要：提出了一种模块化装配式柱贯通梁实腹式钢结构框架体系,对板块拼接形成的双槽钢组合截面梁的整体稳定性进行了研究。首先证明了双槽钢组合截面梁有限元模型建立方法的可行性,然后分析了不同螺栓布置方式下螺栓间距对双槽钢组合截面梁静力性能的影响,得到合理的螺栓间距。对比分析了梁截面高度、翼缘宽度和厚度、腹板厚度、梁长、双槽钢间隙宽度、螺栓布置方式和荷载类型等参数对钢梁整体稳定性的影响,用拟合的方法得到了等效弯矩系数的计算公式以及弹塑性稳定系数和弹性稳定系数的关系公式。通过对纯弯荷载作用下弹性稳定系数计算公式的等效弯矩系数修正和弹塑性修正,得到了不同荷载类型下的弹塑性稳定系数的计算公式。A kind of modularized prefabricated steel frame with through column and solid-web beam is presented. Global stability of beams with dual-channel combined section formed through the assembly of plates is studied. Firstly, the feasibility of establishment method of the finite element model is proved. Then the effect of bolt pitch on the static performance of beams with dual-channel combined section under different bolt arrangement is analyzed and reasonable bolt pitch is investigated. The influence of beam section height, flange width and thickness, web thickness, beam length, width between double channels, bolt arrangement and load type on the global stability of steel beams is analyzed. The formula for calculating the equivalent bending moment coefficient and the relationship between the elastic-plastic stability coefficient and the elastic stability coefficient are obtained by the fitting method. The formula for calculating the elastic-plastic stability coefficient under different load types are obtained through the equivalent bending moment coefficient and elastic-plastic correction of calculation formula of elastic stability coefficient under pure moment.

关 键 词：双槽钢组合截面梁 弹性稳定系数 弹塑性稳定系数 等效弯矩系数 拟合方法 

分 类 号：TU392.1[建筑科学—结构工程] TU311.2