冷弯薄壁型钢—石膏基自流平砂浆组合楼盖基频研究

管宇1,石宇2,高立1

振动与冲击 ›› 2018, Vol. 37 ›› Issue (20) : 207-215.

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PDF(2225 KB)
振动与冲击 ›› 2018, Vol. 37 ›› Issue (20) : 207-215.
论文

冷弯薄壁型钢—石膏基自流平砂浆组合楼盖基频研究

  • 管宇1,石宇2,高立1
作者信息 +

A study on fundamental frequency of cold-formed thin-walled steel-gypsum based  self-leveling mortar composite floor

  • GUAN Yu1, SHI Yu2, GAO Li1
Author information +
文章历史 +

摘要

对2个冷弯薄壁型钢—石膏基自流平砂浆组合楼盖足尺模型进行了人沿平行和垂直楼盖梁方向行走、人沿楼盖对角线方向行走、激励锤冲击4种不同动力荷载工况下的振动试验,研究钢丝网布置对组合楼盖自振频率的影响。研究表明:组合楼盖的自振频率不会随着外部激励的改变而发生较大变化,在石膏基自流平砂浆中加入钢丝网不会显著增加组合楼盖的自振频率。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:增大楼盖梁板厚和减小楼盖跨度会显著提高冷弯薄壁型钢组合楼盖的基频,而改变楼盖面板厚度、楼盖的宽度以及增设扁钢带和刚性支撑件对冷弯薄壁型钢组合楼盖的基频影响较小。在参数分析的基础上,可将组合楼盖等效为具有均匀质量和刚度的简支梁模型来计算冷弯薄壁型钢组合楼盖的基频。

Abstract

Two full scale models of cold-formed thin-walled steel-gypsum based self-leveling mortar composite floor were carried out for vibration test under four dynamic loadings which included walking along and transverse to the floor joist, walking along the diagonal direction of floor and hammer impact.The effects to the natural frequency of composite floors were studied when steel mesh was installed.The study showed that the natural frequency of composite floor did not change greatly with the change of external excitation.It did not significantly increase the natural frequency of composite floor via installing steel mesh into the gypsum based self-leveling mortar.The ABAQUS finite element software was used to conduct modal analysis of test models as well as variable parameter analysis based on the calibrated model.The research shows that fundamental frequency of cold-formed thin-walled steel composite floor can be improved by increasing plate thickness of floor joist and reducing floor span.The change of floor slab thickness and floor width along with strengthening flat strap and blocking brings little effect to the fundamental frequency of cold-formed thin-walled steel composite floor.Based on parameter analysis, composite floor can be equivalent to a simply supported beam with uniform quality and stiffness for computing the fundamental frequency of cold-formed thin-walled steel composite floor.

关键词

冷弯薄壁型钢 / 石膏基自流平砂浆 / 组合楼盖 / 基频 / 试验研究

Key words

cold-formed steel / gypsum based self-leveling mortar / composite floor / fundamental frequency / experimental study

引用本文

导出引用
管宇1,石宇2,高立1. 冷弯薄壁型钢—石膏基自流平砂浆组合楼盖基频研究[J]. 振动与冲击, 2018, 37(20): 207-215
GUAN Yu1, SHI Yu2, GAO Li1. A study on fundamental frequency of cold-formed thin-walled steel-gypsum based  self-leveling mortar composite floor[J]. Journal of Vibration and Shock, 2018, 37(20): 207-215

参考文献

[1] Parnell R A, Davis B W, Xu L. Vibration performance of lightweight cold-formed steel floors [J]. Journal of Structural Engineering, 2010, 136(6): 645-653.
[2] Xu L. Floor vibration in lightweight cold-formed steel framing [J]. Advances in Structural Engineering, 2011, 14(4): 659-672.
[3] 贾子文, 周绪红. 冷弯薄壁型钢—混凝土组合楼盖振动性能试验研究[J]. 土木工程学报, 2011, 44(4): 42-51.
Jia Ziwen, Zhou Xuhong. Experimental study of vibration behavior of cold-formed steel concrete composite floor [J]. China Civil Engineering Journal, 2011, 44(4): 42-51.
[4] AISC/ CISC. Steel design guide series 11- floor vibrations due to human activity [M]. American Institute of Steel Construction, Chicago, 1997.
[5] BS EN 1998-1:2004, Design of structures for earthquake resistance [S]. European Committee for Standardization, Management Centre, rue de Stassart, 2005
[6] CECS 261: 2009, 钢结构住宅设计规范[S]. 北京: 中国建筑工业出版社, 2009.
CECS 261: 2009, Code for design of steel structure residential buildings [S]. Beijing: China Architecture and Building Press, 2009.
[7] JGJ 99-2015, 高层民用建筑钢结构技术规程[S]. 北京: 中国建筑工业出版社, 2015.
JGJ 99-2015, Technical specification for steel structure of tall building [S]. Beijing: China Architecture and Building Press, 2015.
[8] 魏健. 冷弯薄壁型钢—意杨胶合板组合楼盖振动性能研究[D]. 南京: 南京林业大学硕士学位论文, 2014.
Wei Jian. Vibration performance of cold-formed steel-Italian poplar structure plywood composite floor system [D]. Nan jing: Master's degree thesis of Nanjing Forestry University, 2014.
[9] 周绪红, 高婷婷, 石宇. 冷弯薄壁型钢梁—OSB板组合楼盖静力挠度及振动性能试验研究[J]. 工程力学, 2014, 31(5): 211-217.
Zhou Xuhong, Gao Tingting, Shi Yu. Experimental study on static deflection and vibration behavior of cold-formed steel OSB composite floor [J]. Engineering Mechanics, 2014, 31(5): 211-217.
[10] 贾子文, 周绪红. 冷弯薄壁型钢—混凝土组合楼盖基频研究[J]. 工程力学, 2010, 27(11): 144-153.
Jia Ziwen, Zhou Xuhong. Study on fundamental frequency of cold-formed steel concrete floor [J]. Engineering Mechanics, 2011, 27(11): 144-153.
[11] GB/T 228.1-2010, 金属材料 拉伸试验 第1部分:室温试验方法[S]. 北京: 中国标准出版社, 2010.
GB/T 228.1-2010, Metallic materials-tensile testing-Part I: Method of at room temperature [S]. Beijing: China Standard Press, 2010.
[12] GB 50018-2002, 冷弯薄壁型钢结构技术规范[S]. 北京: 中国计划出版社, 2002.
GB 50018-2002, Technical code of cold-formed thin-wall steel structures [S]. Beijing: China Planning Press, 2002.
[13] JGJ 227-2011, 低层冷弯薄壁型钢房屋建筑技术规程[S]. 北京: 中国建筑工业出版社, 2011.
JGJ 227-2011, Technical specification for low-rise cold-formed thin-walled steel buildings [S]. Beijing: China Architecture and Building Press, 2011.
[14] GB 50016-2014, 建筑设计防火规范[S]. 北京: 中国计划出版社, 2014.
GB 50016-2014, Code for fire protection design of buildings [S]. Beijing: China Planning Press, 2014.

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