PDF(2494 KB)
步行激励下大跨度钢-混凝土空心板组合梁振动舒适度研究
Jiepeng Liu, Shu Huang, Jiang Li, Y. Frank Chen
工程（英文） ›› 2022, Vol. 19 ›› Issue (12) : 93-104.
PDF(2494 KB)
PDF(2494 KB)
步行激励下大跨度钢-混凝土空心板组合梁振动舒适度研究
Vibration Serviceability of Large-span Steel–Concrete Composite Beam with Precast Hollow Core Slabs Under Walking Impact
大跨度预制钢-混凝土空心板组合梁（CBHCS）是一种新型的楼板结构，可用于各种大跨度结构。然而，人为引起的振动会对此类结构的使用产生影响。为了减轻振动，需要探究由人引起的步行力与楼板状态之间的关系。本文首先使用测力板获取了25 名测试者的150 个步行力，确定了单步行走的傅里叶级数中的动态载荷系数和相位角。其次，对7 个CBHCS试样进行了行走测试，获取了模态振型、固有频率、阻尼比和加速度等基本动态特性。CBHCS楼板系统通常表现出高频（>10 Hz）和低阻尼（阻尼比低于2%）的特性。本文还使用有限元方法进行了灵敏度研究，以研究CBHCS楼板系统的振动性能，考虑了楼板厚度、
钢梁类型、接触时间和人体重量。最后，本文推导了基频和峰值加速度的解析表达式，与实验结果吻合较好，具有实际的应用价值。
A large-span steel–concrete composite beam with precast hollow core slabs (CBHCSs) is a relatively new floor structure that can be applied to various long-span structures. However, human-induced vibrations may present serviceability issues in such structures. To alleviate vibrations, both the walking forces excited by humans and the associated floor responses must be elucidated. In this study, 150 load–time histories of walking, excited by 25 test participants, are obtained using a force measuring plate. The dynamic loading factors and phase angles in the Fourier series functions for one-step walking are determined. Subsequently, walking tests are performed on seven CBHCS specimens to capture the essential dynamic properties of mode shapes, natural frequencies, damping ratios, and acceleration time histories. The CBHCS floor system generally exhibits a high frequency (> 10 Hz) and low damping (damping ratio < 2%). Sensitivity studies using the finite element method are conducted to investigate the vibration performance of the CBHCS floor system, where the floor thickness, steel beam type, contact time, and human weight are considered. Finally, analytical expressions derived for the fundamental frequency and peak acceleration agree well with the experimental results and are hence proposed for practical use.
Composite beam / Hollow core slab / Walking force / Floor vibration / Mode shape
| [1] |
Girhammar UA, Pajari M. Tests and analysis on shear strength of composite slabs of hollow core units and concrete topping. Constr Build Mater 2008;22 (8):1708–22.
|
| [2] |
Ibrahim IS, Elliott KS, Abdullah R, Kueh ABH, Sarbini NN. Experimental study on the shear behaviour of precast concrete hollow core slabs with concrete topping. Eng Struct 2016;125:80–90.
|
| [3] |
Baran E. Effects of cast-in-place concrete topping on flexural response of precast concrete hollow-core slabs. Eng Struct 2015;98:109–17.
|
| [4] |
Kankeri P, Prakash SS. Experimental evaluation of bonded overlay and NSM GFRP bar strengthening on flexural behavior of precast prestressed hollow core slabs. Eng Struct 2016;120:49–57.
|
| [5] |
Lam D, Elliott KS, Nethercot DA. Steel-concrete composite construction with precast concrete hollow core floor. In: Proceedings of The Second International Conference on Advances in Steel Structures; 1999 Dec 15–17; Hong Kong, China. Amsterdam: Elsevier; 1999. p. 459–66.
|
| [6] |
Lam D, Elliott KS, Nethercot DA. Experiments on composite steel beams with precast concrete hollow core floor slabs. Proc Inst Civ Eng, Struct Build 2000;140(2):127–38.
|
| [7] |
Lam D, Elliott KS, Nethercot DA. Parametric study on composite steel beams with precast concrete hollow core floor slabs. J Construct Steel Res 2000;54 (2):283–304.
|
| [8] |
Lam D, Nip TF. Effects of transverse reinforcement on composite beam with precast hollow core slabs. In: Proceedings of the Third International Conference on Advances in Steel Structures; 2002 Dec 9–11; Hong Kong, China. Amsterdam: Elsevier; 2002. p. 503–10.
|
| [9] |
Lam D. Capacities of headed stud shear connectors in composite steel beams with precast hollowcore slabs. J Construct Steel Res 2007;63(9):1160–74.
|
| [10] |
Aguado JV, Espinos A, Hospitaler A, Ortega J, Romero ML. Influence of reinforcement arrangement in flexural fire behavior of hollow core slabs. Fire Saf J 2012;53:72–84.
|
| [11] |
Aguado JV, Albero V, Espinos A, Hospitaler A, Romero ML. A 3D finite element model for predicting the fire behavior of hollow-core slabs. Eng Struct 2016;108:12–27.
|
| [12] |
Jendzelovsky N, Zabakova Vrablova K. Comparison of natural frequencies of hollow core slabs. Appl Mech Mater 2015;769:225–8.
|
| [13] |
Marcos LK, Carrazedo R. Parametric study on the vibration sensitivity of hollow-core slabs floors. In: Proceedings of the 9th International Conference on Structural Dynamics, EURODYN 2014; 2014 Jun 30–Jul 2; Porto, Portugal. p. 1095–102.
|
| [14] |
Liu F, Battini JM, Pacoste C, Granberg A. Experimental and numerical dynamic analyses of hollow core concrete floors. Structures 2017;12:286–97.
|
| [15] |
Harper FC. The mechanics of walking. Res Appl Ind 1962;15(1):23–8.
|
| [16] |
Blanchard J, Davies BL, Smith JW. Design criteria and analysis for dynamic loading of footbridges. In: Proceeding of a Symposium on Dynamic Behaviour of Bridges at the Transport and Road Research Laboratory; 1977 May 19; Crowthorne, England. Washington, DC: TRID; 1977. p. 90–106.
|
| [17] |
Allen DE, Murray TM. Design criterion for vibrations due to walking. Eng J 1993;30(4):117–29.
|
| [18] |
Zˇivanovic´ S, Pavic´ A, Reynolds P. Probability-based prediction of multimode vibration response to walking excitation. Eng Struct 2007;29(6): 942–54.
|
| [19] |
Chen J, Peng Y, Wang L. Experimental investigation and mathematical modeling of single footfall load using motion capture technology. China Civil Eng J 2014;47(3):79–87. Chinese.
|
| [20] |
Chen J, Ding G, Zˇivanovic´ S. Stochastic single footfall trace model for pedestrian walking load. Int J Struct Stab Dyn 2019;19(03):1950029.
|
| [21] |
Ebrahimpour A, Hamam A, Sack RL, Patten WN. Measuring and modeling dynamic loads imposed by moving crowds. J Struct Eng 1996;122 (12):1468–74.
|
| [22] |
EN 1994-1-1. Euro Code 4. Design of composite steel and concrete structuresPart 1-1: General rules and rules for buildings. European standard. Brussels: European Committee for Standardization; 2004.
|
| [23] |
DHDAS software [Internet]. Jingjiang: Donghua Testing Technology; c2021 [cited 2020 Sep 29]. Available from: http://www.dhtest.com/dhdasrj.
|
| [24] |
ISO 2631-2. Mechanical vibration and shock-Evaluation of human exposure to whole-body vibration—part 2: vibration in buildings (1 Hz to 80 Hz). ISO standard. Geneva: International Organization for Standardization; 2003.
|
| [25] |
Grubbs FE. Procedures for detecting outlying observations in samples. Technometrics 1969;11(1):1–21.
|
| [26] |
Altunisik AC, Bayraktar A, Sevim B, Özdemir H. Experimental and analytical system identification of Eynel arch type steel highway bridge. J Construct Steel Res 2011;67(12):1912–21.
|
| [27] |
Abaqus, Inc. Abaqus analysis user’s manual version 6.14. Boston: Dassault Systemes Simulia Corp., USA; 2014.
|
| [28] |
Bai J, Chen H, Zhao J, Liu M, Jin S. Seismic design and subassemblage tests of buckling-restrained braced RC frames with shear connector gusset connections. Eng Struct 2021;234:112018.
|
| [29] |
Li J, Zhang R, Liu J, Cao L, Chen YF. Determination of the natural frequencies of a prestressed cable RC truss floor system. Measurement 2018;122:582–90.
|
| [30] |
Murray T, Allen D, Ungar E, Davis DB. Floor vibrations due to human activities: design guide 11. 2nd ed. Chicago: American Institute of Steel Construction; 2016.
|
| [31] |
Zhou X, Cao L, Chen YF, Liu J, Li J. Experimental and analytical studies on the vibration serviceability of pre-stressed cable RC truss floor systems. J Sound Vibrat 2016;361:130–47.
|
/
| 〈 |
|
〉 |
