Parameter Study of a New Strut-and-Tie Model for a Thick Cap with Six Piles
Publication: International Journal of Geomechanics
Volume 16, Issue 1
Abstract
A comprehensive strut-and-tie model is a function of the nodes, struts, ties, model types, and pile reaction force. Because each element has more than one solution, the function is a problem of permutations and combinations. This paper presents a new strut-and-tie model that yields a satisfactory simulation result. In the model, a model type of truss action, direct arch action, or a combination of both actions was selected independently for the side and angle piles. The node and tie parameters were also modified. The pile reaction force distribution and the failure mechanism for inclined struts were also considered. However, because the authors’ previous study did not include a detailed analysis or an in-depth exploration, the effect of these critical factors is discussed in this paper at length. The model, which was programmed using the MATLAB language, was used to sequentially analyze the possible solutions for each member (nodes, ties, and struts). Different solutions for the ratio of truss action and direct arch action were also compared. The inclined struts with variable cross sections were tested under various failure mechanisms. Furthermore, the effect of the pile reaction force, which was distributed using model test measurements and theoretical (elastic or rigid) analyses, was analyzed. Comparison of the solutions indicated that the function , which included the essential elements described above, was both rational and accurate.
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Acknowledgments
This research was supported by the National Key Basic Research Program of China (2013CB036304), a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) and the National Natural Science Foundation of China (51478109).
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Published In
International Journal of Geomechanics
Volume 16 • Issue 1 • February 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Feb 28, 2014
Accepted: Mar 3, 2015
Published online: Jun 24, 2015
Discussion open until: Nov 24, 2015
Published in print: Feb 1, 2016
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