Frontiers of Structural and Civil Engineering
>> 2017,
Volume 11,
Issue 2
doi:
10.1007/s11709-017-0391-0
RESEARCH ARTICLE
Application of a vertex chain operation algorithm on topological analysis of three-dimensional fractured rock masses
. Department of Geotechnical Engineering, School of Civil Engineering, Tongji University, Shanghai 200092, China.. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University.. State Key Laboratory for Geomechanics and Deep Underground Engineering, Xuzhou 221008, China.. Shanghai?Tunnel?Engineering?&?Rail?Transit?Design?and?Research?Institute, Shanghai 200235, China
Accepted: 2017-04-19
Available online: 2017-05-19
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Abstract
Identifying the morphology of rock blocks is vital to accurate modelling of rock mass structures. This paper applies the concepts of directed edges and vertex chain operations which are typical for block tracing approach to block assembling approach to construct the structure of three-dimensional fractured rock masses. Polygon subtraction and union algorithms that rely merely on vertex chain operation are proposed, which allow a fast and convenient construction of complex faces/loops. Apart from its robustness in dealing with finite discontinuities and complex geometries, the advantages of the current methodology in tackling some challenging issues associated with the morphological analysis of rock blocks are addressed. In particular, the identification of complex blocks with interior voids such as cavity, pit and torus can be readily achieved based on the number and the type of loops. The improved morphology visualization approach can benefit the pre-processing stage when analyzing the stability of rock masses subject to various engineering impacts using the block theory and the discrete element method.
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