冷弯薄壁型钢组合楼盖振动性能及静力挠度研究

管宇; 周绪红; 卫世杰; 石宇

doi:10.6052/j.issn.1000-4750.2017.01.0060

冷弯薄壁型钢组合楼盖振动性能及静力挠度研究

管宇^1,,
周绪红^1,2,
卫世杰¹,
石宇²

1.
长安大学建筑工程学院, 西安 710061;
2.
山地城镇建设与新技术教育部重点实验室, 重庆大学, 重庆 400045

基金项目: 国家自然科学基金面上项目（51678060）；国家重点研发计划“绿色建筑及建筑工业化”专项（2016YFC0701201）；中央高校基本科研业务费专项资金项目（310828171011）

详细信息

作者简介:
周绪红(1956-),男,湖南南县人,教授,工学博士,中国工程院院士,重庆大学校长,主要从事钢结构和钢筋-混凝土组合结构基本理论及应用研究(E-mail:zhouxuhong@126.com);卫世杰(1990-),男,山西人,硕士生,主要从事轻型钢结构研究(E-mail:weishijiexa@163.com);石宇(1978-),女(苗族),湖北宣恩人,副教授,工学博士,主要从事轻型钢结构理论与应用研究(E-mail:shiyu7811@163.com).

通讯作者:
管宇(1988-),男,天津人,讲师,工学博士,主要从事轻型钢结构和钢-混凝土组合结构研究(E-mail:guanyu88927@163.com)

中图分类号: TU392.5;TU398
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- 文章访问数: 467
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出版历程
- 收稿日期: 2017-01-13
- 修回日期: 2017-07-20
- 刊出日期: 2018-05-24

STUDY ON VIBRATION PERFORMANCE AND STATIC DEFLECTION OF COLD-FORMED THIN-WALLED STEEL COMPOSITE FLOORS

1.
School of Civil Engineering, Chang'an University, Xi'an 710061, China;
2.
Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of Education, Chongqing University, Chongqing 400045, China

摘要

摘要: 对冷弯薄壁型钢-压型钢板楼盖和冷弯薄壁型钢—石膏基自流平砂浆组合楼盖足尺模型进行了人行荷载和激励锤冲击下的振动试验以及1 kN集中荷载作用下的静载试验，研究楼面板形式以及钢丝网布置对组合楼盖自振频率、阻尼比以及跨中竖向挠度的影响。研究表明：在压型钢板上浇筑石膏基自流平砂浆会降低组合楼盖的自振频率、阻尼比以及跨中竖向挠度，而在石膏基自流平砂浆中加入钢丝网并不会显著增加楼盖的动力特性以及减小楼盖的竖向挠度。采用ABAQUS有限元软件对试验模型进行模态分析，并对验证后的有限元模型进行了变参数分析，研究表明：增大楼盖梁腹板高度、楼盖梁板厚以及楼盖面板厚度，加强楼盖端部约束会提高冷弯薄壁型钢组合楼盖的基频、减小楼盖跨中挠度。理论计算时，可将楼盖等效为具有均匀质量和刚度的简支梁模型用于预测冷弯薄壁型钢组合楼盖的基频；推荐使用加拿大木楼盖挠度计算公式用于预测冷弯薄壁型钢组合楼盖在1 kN集中荷载作用下的跨中挠度。
- 冷弯薄壁型钢 /
- 石膏基自流平砂浆 /
- 组合楼盖 /
- 振动性能 /
- 试验研究
Abstract: Full scale models of cold-formed thin-walled steel-profiled steel sheet floors and cold-formed thin-walled steel-gypsum based self-leveling mortar composite floors were subjected to vibration test under dynamic loading including walking and hammer impact, and to static test under 1 kN concentrated load. The effects on the fundamental frequency, damping ratio and mid-span vertical deflection of the composite floors were studied when floor panels were different and steel meshes were installed. The study shows that casting gypsum based self-leveling mortar on the profiled steel sheet could reduce the fundamental frequency, damping ratio and mid-span vertical deflection of composite floors. Nevertheless, it did not significantly increase the dynamic characteristics and decrease the vertical deflection of composite floor via installing steel mesh into gypsum based self-leveling mortar. ABAQUS finite element software was used to conduct modal analysis of the test models as well as variable parametric analysis based on the calibrated model. The research shows that the floor fundamental frequency could be improved and floor mid-span deflection could be reduced by increasing the web height, slab thickness of the floor joist and slab thickness of gypsum based self-leveling mortar, along with strengthening the floor end constraints. In theoretical calculation, the floor could be equivalent to a simply supported beam with uniform mass density and stiffness for predicting the fundamental frequency of cold-formed thin-walled steel composite floors. Additionally, the timber floor deflection calculation formula of Canada was recommended to predict the mid-span deflection of cold-formed thin-walled steel composite floors under 1 kN concentrated load.
- cold-formed steel /
- gypsum based self-leveling mortar /
- composite floor /
- vibration performance /
- experimental study

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参考文献(24)

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文章访问数: 467
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冷弯薄壁型钢组合楼盖振动性能及静力挠度研究

通讯作者: 管宇(1988-),男,天津人,讲师,工学博士,主要从事轻型钢结构和钢-混凝土组合结构研究(E-mail:guanyu88927@163.com)

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出版历程

STUDY ON VIBRATION PERFORMANCE AND STATIC DEFLECTION OF COLD-FORMED THIN-WALLED STEEL COMPOSITE FLOORS

期刊类型引用(11)

其他类型引用(13)

计量

出版历程

目录

通讯作者:
管宇(1988-),男,天津人,讲师,工学博士,主要从事轻型钢结构和钢-混凝土组合结构研究(E-mail:guanyu88927@163.com)