Study on Safety of Anchored Jointed Rockmass Based on Mesoscale Fracture Mechanics

扫码查看

原文链接

NETL

外文摘要：Present numerical simulation of anchored discontinuous jointed rockmass can not pertinently reflect the actual anchorage effects。 This paper establishes complex calculation model in line with the actual condition: an entity element is used to simulate an anchor and a contact element is applied between the bolt and the rockmass。 The stress intensity factor at the wing crack tip is used as the basis for evaluating the stability， and the calculated results are compared with the results produced by the virtual spring model (the calculation model which enables the anchor to be equivalent with the virtual spring)。 The crack-propagation prevention capacity of the entity element with bending degree of freedom is obviously better than that of the virtual spring anchor which only has tension and compression degree of freedom。 The calculated results reveal the disadvantage of virtual spring model which is widely applied in engineering and more practical and effective method is brought forward。 Inaddition， the optimal anchoring angle can also be produced via the contact entity element。

外文关键词：

Anchorage effectstress intensity factorvirtual springsafety analysis

作者：

Qin Hao、LI Shucai

展开 >

作者单位：

Research Center of Geotechnical and Structural Engineering,Shandong University,Jinan,Shandong 250061,P.R.China

会议名称：

International symposium on risk control and managment of design, construction and operation in underground engineering;IRCM' 09

会议地点：

Dalian(CN);Dalian(CN)

会议母体文献：

Proceedings of 2009 international symposium on risk control and managment of design, construction and operation in underground engineering

页码：

p.155-158

出版时间：

2009