Study of Material, Diameter, Loading and Internal Angles Effects on Joints Displacements in Truss Members

Document Type : Research Paper

Authors

1 M.Sc. of Mechanical Engineering, Department of Mechanical Engineering, Ahar Branch, Islamic Azad University, Ahar, Iran.

2 Assistant Professor, Department of Mechanical Engineering, Ahar Branch, Islamic Azad University, Ahar, Iran.

Abstract

Trusses is one of most usable structures in engineering. Truss is combination of bar elements created. Triangle shape is most stable possible are formed by bar elements in truss. In this research, effects of variations in internal angles, elastic modulus, diameters and loading on truss members and displacement in joints were evaluated. For this purpose, 45 models in Sigma/w analyzed. Results of present study showed that with decreasing elastic modulus in members, vertical and horizontal displacement in joints increase. Also, horizontal displacement in supports with two freedom degree is more than supports including one freedom degree. 

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1- فرشی، ب و علی نیا زیازی، ع.، 1390، به کارگیری روش نیرو و روش مرکزها در بهینه سازی وزن خرپاها، مجله مهندسی مکانیک شریف، سال بیست و هفتم، شماره 2.   
2- قدوسیان، ع و نیکوبین، ا و ریاحی، م.، 1395، بهینه سازی اندازه و شکل سازه های خرپا با روش بهینه سازی الگوریتم مثلث بهینه گر، فصلنامه مدل سازی در مهندسی ، شماره 46.
3- کاوه، ع و کلات جاری، و و منصوریان، پ.، 1392، بهینه یابی سریع خرپا با استفاده از الگوریتم ژنتیک موازی تحت قید قابلیت اعتماد با بهبود روش جبری نیروها و هوش مصنوعی، نشریه مهندسی عمران، سال بیست و چهارم، شماره 2.
4- Bekdas, G., Nigdeli, S. and Yang, X., 2015, Sizing optimization of truss structures using flower pollination algorithm, Applied Soft Computing, 37, 322–331.
5- David, G. and Morsy, M., 2016, Vertical load capacities of roof truss cross members, International Journal of Mining Science and Technology, 26, 517–520.
6-Islam, A. and Phillips, D., 2017, an experimental analysis of a timber Howe truss, Engineering Structures, 10, 39-48.
7- Zhao, X., Yan, Sh., Chen, Y., Xu, Zh. and Lu, Y., 2017, Experimental study on progressive collapse-resistant behavior of planar trusses, Engineering Structures, 135, 104-116.