柔性钢框架结构受力性能分析

唐强; 刘强; 王连坤; 杨惠贤; 郭语; 严自强; 王吉琮

doi:10.13206/j.gjgS20092302

柔性钢框架结构受力性能分析

doi: 10.13206/j.gjgS20092302

1. 五邑大学土木建筑学院, 广东江门 529020;
2. 江阴市三江钢结构设计有限公司, 江苏无锡 214400

详细信息

作者简介:
唐强，男，1992年出生，硕士研究生

通讯作者:
王连坤，博士研究生，副教授，硕士研究生导师，630291053@qq.com

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- 被引次数: 0
出版历程
- 收稿日期: 2020-09-23
- 网络出版日期: 2022-01-26

Analysis of Mechanical Performance of Steel Frames Composed of Non-Compact Members

1. School of Civil Engineering, Wuyi University, Jiangmen 529020, China;
2. Jiangyin Sanjiang Steel Structure Design Co., Ltd., Wuxi 214400, China

摘要

摘要: 为了分析强弱轴、梁柱截面宽厚比、高跨比、轴压比对柔性框架结构在低周往复荷载作用下初始刚度、承载力、变形能力的影响, 首先对一榀双层无轴压条件下的柔性钢框架进行拟静力试验研究, 以试验结果为依据, 在此基础上建立非线性有限元模型, 并对以下内容进行了研究: 1)轴压比为0.1、0.2、0.3、0.4时对结构的峰值位移、峰值荷载、初始刚度及变形能力的影响; 2)通过分别改变结构层高和跨度来改变高跨比, 研究结构受力性能变化; 3)通过分别改变腹板和翼缘宽厚来改变宽厚比, 研究其对结构受力性能的影响; 4)柱的强、弱轴对构件受力性能的影响。结果表明: 1)增大轴压比时, 承载力、变形能力和初始刚度均降低; 2)结构的承载能力、初始刚度与高跨比成反相关, 变形能力随着高跨比的增大而增大; 3)随宽厚比增大, 承载能力、初始刚度均增大; 4)强、弱轴方向的改变对结构整体性能的影响较大, 当钢柱从强轴方向变为弱轴方向时, 承载能力下降了40%, 初始刚度下降了65%。
- 柔性钢框架 /
- 抗震性能 /
- 有限元分析
Abstract: To analyze the influence of the strength-weakness axis, the width-thickness ratio, the high span ratio, and the axial compression ratio on initial stiffness bearing capacity of flexible frame structure under low cyclic reciprocating load, the quasi-static test study of a single-span and double-layer steel frame was carried out, and the test results were obtained. Based on the test results, a nonlinear finite element model was established. The specific content: 1)Study the effect of the axial compression ratio of 0.1, 0.2, 0.3, 0.4 on the peak displacement, peak load, initial stiffness, and deformation capacity of the structure. 2)Study the structural performance, by changing the height of the structure layer and the span. 3)Study the effect of the width-to-thickness ratio to structural performance by changing the width-to-thickness ratio of the web and the flange. 4)Study the influence of the strength-weakness axis of the column on the members.Specific conclusions: 1)With the axial compression ratio increasing, the bearing capacity, deformation capacity, and initial stiffness were all reduced. 2)The bearing capacity, initial stiffness, and height-span ratio of the structure were inversely related, and the deformation capacity increased with the increase of the height-span ratio. 3)The width-to-thickness ratio increased the load-bearing capacity and the initial stiffness. 4)The change in the direction of the strong and weak axis had a greater impact on the overall performance of the structure. When the steel column changed from the strong axis to the weak axis, the bearing capacity decreased by 40%, the initial stiffness dropped by 65%.
- flexible steel frames /
- seismic performance /
- finite element analysis

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参考文献(10)

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