Innovative Timber Connection Research Paper Example

Innovative construction materials are increasingly revolutionizing the construction industry. While BIM was thought to be the most innovative technology the construction industry, innovative timber connection is also becoming one of the key game changers that would bring costs down and improve structural integrity without compromising on aesthetics and reliability of the connected timber (Ber, Premrov, Sustersic & Dujic, 2013).

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Research Aim and Objectives

The main research objectives would be to determine the following

• To review various types of innovative timber connections
• Ductility levels of various innovative timber connection
• To analyze the impairment of resistances of the selected innovative timber connections to determine the connection equivalent viscous damping ratio.
• To determine the causes of innovative timber connections
• To analyze the extreme bending movements and the area of the section where the highest bending moment occurs.
• To investigate the ductility of timber and timber members connected

Rationale

Both cross laminated structures, large span timber trusses and timber framing structures may be expensive considering the number of materials used and waste in the process of contraction. The innovative timber connection is supposed to help in cost-cutting by using either single connector types placed at the corners of the timbers such as the cross-laminated timber panels. Over the past, the structural integrity of the connection especially in relations to the cross-laminated timber structures has been combined with various materials to help in the exploitation of the full potential of the cross-laminated timber connection while improving ductility responses of such connection. Innovation timber connection is designed and adopted with the aim o g achieving construction modularity, increased the speed of assembly and disassembly and enable prefabrication.

According to Leijten (2001), timber connection can be improved through mechanical fastening techniques to improve the structural integrity. For example, the expanded tube fastener can be used to locally connect and locally reinforced the timber connection at the joint areas where dandified plywood is used and in most cases, the densified wood is mainly used to prevent the connections from premature failure. There are a number of traditional connections that are relatively weak because the strength and stiffness of that connection are not reliable and have poor ductility (Kanocz, Bajzecerova & Mojdis, 2014). For example, Valipour, Khorsandnia, Crews & Palermo, (2016) argues that the innovative timber connection produce excellent dynamics test results to prove that the joints have the ability to withstand larger deflection without compromising the strength of the connection (Cambiaso & Pietrasanta, 2014). It is easy to design statistically indeterminate structures cheaply veneer wood can be used to reinforce the timber as the sheets of veneer are glued to the timber members as the veneer has been reported by (Kala, Salajka & Hradil, 2012).

To prevent timber splits leading to failure. the densified veneer wood (DWV) is high strength plywood. The material stresses and elastic strains affect the timber connection strength (Lesmana & Suhendi, 2017). It is, therefore, important to determine if the innovative timber connection meet the qualities of good timber connection such as structural integrity, connection capacity, better load-bearing capacity, and environmental changes. The researcher would also examine the type of timber suitable for different innovative timber connections and make recommendations

Methodology

Research design

The research will be an experimental research method where the properties of traditional timber connection and innovative timber connection would be analyzed and compared in term of their ductility, strength capacity, reliability, durability, stiffness, impairment in resistance and their Moment rotation behavior, pinching and displacements

Data collection and analysis

Data would be collected throughout the experiment sessions. The researcher would randomly selected ten different timber connections from the entire sample, space of timber connection in the city. The randomly selected innovative timber selection would then be examined over the eight months during which the research would be conducted and the observation would be recorded for further reanalysis. The research would collect both quantitative and qualitative data to be analyzed. The qualitative data would be collected from the building and constructing engineers who are currently using the innovative timber connection. the Quantitative data would be collected from observation recorded from the experiment. Information such as the compression forces, the elasticity of the timbers, the euro codes used, the types move Dowel type fasteners used whether nails, staples, - punched metal plates, - screws, - dowels and bolts. The types of connectors used whether they are Shear plates - Split-rings, types of nails, bolts, screw and dowels used in the timber connections.

The researcher would also collect information such as metal plate fasteners used. The researcher must also collect information on the fastener spacing requirements (bolts) especially the Spacing and end/edge Angle distances, the timber dimension, the member width (Polastri, Giongo & Piazza, 2017). Information on the types of loads whether the connection is laterally loaded or axially loaded and the material used as they can be either r timber or plywood nail plate, heavy gauge steel or dowelled fin plate (Pearson, Evernden & Harris, 2012). The embedment strength would be calculated based on the displacement before and after drilling the nails (Araki, Endo & Iwata, 2011). Finally, the researcher would also collect information on the types of timber whether coniferous or deciduous woods to help in the re-evaluation of the parallel to grain embedment results.

Data analysis would be conducted using statistical analysis software. there are current models and equation thatch can be used to determine the strength of joints and ductility. Therefore, to a researcher would fist represent the timber at macro-scale in a 3D continuum and use the Hooke's generalized law but it the Voigt matrix form. For example, the constitutional law is founded on the belief that there are small strains that must be adapted to the main direction of the wood (Leijten, 2011). The researcher would calculate the angle to grain, the longitudinal force of the embedment and carry out the embedment test of the joints perpendicular to the grain. Finally, the researcher would investigate the failure mode of single and double shear fastener.

Timeline

• Starting date Ending date
• Write introduction and refine research objectives July 2018 September 2018
• Identify peer-reviewed sources and complete the literature review October 2018 November 2018
• Complete the research methodology January 2019 march
• Prepare the research instruments March 2019 March 2019
• Collect data for the study April 2019 July
• Analyze research data July August
• Compile preliminary research findings august September
• Write the first draft for the study September 2019 October 2019
• Meet professor to discuss the search progress October 2019 October 2019
• Complete writing the discussion section October 2019 November 2019
• Complete research conclusion section November 2019 November 2019
• Finalize the research report December 2019 December 2019
• Presentation to the professor and revise based on the feedback and remarks January 2020 January 2020
• Write the final draft January 2020 February 2020
• Presenting final paper February 2020

Bibliography

Araki, Y., Endo, T., & Iwata, M. (2011). Feasibility of improved slotted bolted connection for timber moment frames. Journal of Wood Science, 57(3), 247-253. Doi: 10.1007/s10086-010-1165-7

Ber, B., Premrov, M., Sustersic, I., & Dujic, B. (2013). Innovative earthquake resistant timber-glass buildings. Natural Science, 05(08), 63-71. Doi: 10.4236/ns.2013.58a1008

Cambiaso, F., & Pietrasanta, M. (2014). Innovative Timber Construction: Sustainability and Gigh Performance Building Skin. International Journal Of Engineering And Technology, 6(1), 47-54. Doi: 10.7763/ijet.2014.v6.664

Holy, M., & Vrablik, L. (2018). The Timber-Precast UHPC Composite Connection. Solid State Phenomena, 272, 21-27. Doi: 10.4028/www.scientific.net/ssp.272.21

Kala, J., Salajka, V., & Hradil, P. (2012). Calculation of Timber Outlook Tower with Influence of Behavior of "Steel-Timber" Connection. Advanced Materials Research, 428, 165-168. Doi: 10.4028/www.scientific.net/amr.428.165

Kanocz, J., Bajzecerova, V., & Mojdis, M. (2014). Experimental and Numerical Analysis of Timber-Lightweight Concrete Composite with Adhesive Connection. Advanced Materials Research, 969, 155-160. Doi: 10.4028/www.scientific.net/amr.969.155

Leijten, A. (2001). An Innovative Connection for Timber Engineering. IABSE Symposium Report, 85(1), 13-18. Doi: 10.2749/222137801796349240

Leijten, A. (2011). Requirements for moment connections in statically indeterminate timber structures. Engineering Structures, 33(11), 3027-3032. Doi: 10.1016/j.engstruct.2011.03.014

Lesmana, C., & Suhendi, S. (2017). Experimental investigation of connection performance for prefabricated timber beam. IOP Conference Series: Earth And Environmental Science, 69, 012113. Doi: 10.1088/1755-1315/69/1/012113

Pearson, H., Evernden, M., & Harris, R. (2012). Effect of Timber Grain Orientation on Bonded-In Rod Connection Systems. Key Engineering Materials, 517, 695-704. Doi: 10.4028/www.scientific.net/kem.517.695

Polastri, A., Giongo, I., & Piazza, M. (2017). An Innovative Connection System for Cross-Laminated Timber Structures. Structural Engineering International, 27(4), 502-511. Doi: 10.2749/222137917x14881937844649

Valipour, H., Khorsandnia, N., Crews, K., & Palermo, A. (2016). Numerical modelling of timber/timber-concrete composite frames with ductile jointed connection. Advances In Structural Engineering, 19(2), 299-313. Doi: 10.1177/1369433215624600