Experimental dynamic characterization of a new composite glubam-steel truss structure

Abstract The main characteristics of an original bamboo-steel composite truss structure are presented in this work. Specifically, the considered system is a spatial truss structure whose upper chord and diagonal bars are made by glubam elements whereas its lower chord is made by steel members with a hollow cross-section. This novel structural system has been conceived to build roofs and low/mid-span bridges (for example, footbridges), in such a way to ensure easy and rapid construction, efficient use of the constituent materials, low manufacturing costs and good environmental sustainability. A prototype spatial truss beam for laboratory tests is initially described by providing details about geometry, connections and materials properties. The results obtained from dynamic experimental tests are then discussed. In particular, the dynamic response under ambient vibrations and the free-decay response of this truss structure have been recorded and analyzed in order to estimate its modal properties. Design values of the viscous damping ratio for glubam truss structures with steel bolted connections are finally recommended. The numerical assessment of the human-induced vibration serviceability conditions for footbridges built by means of this structural system is finally performed.

[1]  Juan F. Correal,et al.  Dowel-Bearing Strength Behavior of Glued Laminated Guadua Bamboo , 2012 .

[2]  Carlos E. Ventura,et al.  Damping estimation by frequency domain decomposition , 2001 .

[3]  Georgios Grigoropoulos,et al.  Design and Experimental Verification of Easily Constructible Bamboo Footbridges for Rural Areas , 2017 .

[4]  Chanakya Arya,et al.  Design in timber to BS 5268 , 2009 .

[5]  Francesco Ricciardelli,et al.  Design of Footbridges against Pedestrian-Induced Vibrations , 2016 .

[6]  Maximilian Bock,et al.  Engineered bamboo for structural applications , 2015, Nonconventional and Vernacular Construction Materials.

[7]  Jim Woodhouse,et al.  LINEAR DAMPING MODELS FOR STRUCTURAL VIBRATION , 1998 .

[8]  G. Quaranta,et al.  Experimental Dynamic Testing and Numerical Modeling of Historical Belfry , 2016 .

[9]  J. S. Wang,et al.  Thermal insulation performance of bamboo- and wood-based shear walls in light-frame buildings , 2018, Energy and Buildings.

[10]  Guillaume Habert,et al.  Environmental impacts of bamboo-based construction materials representing global production diversity , 2014 .

[11]  Alberto Maria Avossa,et al.  Deterministic and Probabilistic Serviceability Assessment of Footbridge Vibrations due to a Single Walker Crossing , 2018 .

[12]  José J. García,et al.  A new joint to assemble light structures of bamboo slats , 2015 .

[13]  Francesco Ricciardelli,et al.  Transient Response of Supported Beams to Moving Forces with Sinusoidal Time Variation , 2011 .

[14]  Arfa N. Aijazi,et al.  Comparison of the structure and flexural properties of Moso, Guadua and Tre Gai bamboo , 2015 .

[15]  B. Moor,et al.  Subspace identification for linear systems , 1996 .

[16]  Jian Song,et al.  Fatigue characterization of structural bamboo materials under flexural bending , 2017 .

[17]  Luisa María Gil-Martín,et al.  Engineered Bamboo I-Joists , 2010 .

[18]  Alberto Maria Avossa,et al.  Design Procedures for Footbridges Subjected to Walking Loads: Comparison and Remarks , 2017 .

[19]  A.A.J.F. Van den Dobbelsteen,et al.  An environmental, economic and practical assessment of bamboo as a building material for supporting structures , 2006 .

[20]  Juan F. Correal,et al.  Cyclic behavior of Laminated Guadua Mat sheathing-to-framing connections , 2015 .

[21]  Kent A. Harries,et al.  Bamboo reinforced concrete: a critical review , 2018, Materials and Structures.

[22]  Sanjay R. Arwade,et al.  Development of Laminated Bamboo Lumber: Review of Processing, Performance, and Economical Considerations , 2011 .

[23]  Mike Schlaich,et al.  Guidelines for the design of footbridges , 2005 .

[24]  M. Habibi,et al.  Viscoelastic damping behavior of structural bamboo material and its microstructural origins , 2016 .

[25]  Yan Xiao,et al.  Experimental studies on roof trusses made of glubam , 2014 .

[26]  S AMADA,et al.  Viscoelastic properties of bamboo , 1997 .

[27]  Ana Gatóo,et al.  Effect of processing methods on the mechanical properties of engineered bamboo , 2015 .

[28]  Yan Xiao,et al.  Production, environmental impact and mechanical properties of glubam , 2013 .

[29]  Yan Xiao,et al.  Steel and glubam hybrid space truss , 2018, Engineering Structures.

[30]  Chanakya Arya,et al.  Eurocode 3: Design of steel structures , 2018, Design of Structural Elements.

[31]  Yan Xiao,et al.  Design and Construction of Modern Bamboo Bridges , 2010 .

[32]  Juan F. Correal,et al.  Experimental evaluation of physical and mechanical properties of Glued Laminated Guadua angustifolia Kunth , 2014 .

[33]  Kihong Shin,et al.  Fundamentals of Signal Processing for Sound and Vibration Engineers , 2008 .

[34]  Qi-sheng Zhang,et al.  Compressive performance of laminated bamboo , 2013 .

[35]  Faris Albermani,et al.  Lightweight Bamboo Double Layer Grid System , 2007 .

[36]  Rune Brincker,et al.  Modal identification of output-only systems using frequency domain decomposition , 2001 .

[37]  Zhi Li,et al.  Lateral Loading Behaviors of Lightweight Wood-Frame Shear Walls with Ply-Bamboo Sheathing Panels , 2015 .

[38]  R. C. Adhikari,et al.  Low-cost bamboo lattice towers for small wind turbines , 2015 .

[39]  Yan Xiao,et al.  Studies of Nail Connectors Used in Wood Frame Shear Walls with Ply-Bamboo Sheathing Panels , 2015 .