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《Journal of Liaoning Technical University(Natural Science)》 2010-04
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Distribution of dynamic stress concentration factor of underground openings

WANG Guangyong,YU Yongqiang,ZHANG Suhua,LIU Xiliang (School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454000,China)  
In order to better reinforce underground openings,the distribution of dynamic stress concentration factor of underground openings under the planar waves was investigated based on experiments and theoretical analysis.The results show that when underground openings are affected by planar waves from vault,there are compressed strains on the wall of underground openings.The most of strains occur on arch foot with the incident direction from vault to rib.The peak strains increase at first and then decrease.It also shows that with the change of incident direction from vault to rib,the dynamic stress concentration factor of face-blast side and back-blast side is smaller than that of the direction vertically to face-blast side.With the increase of incident angle,the range and symmetry of dynamic stress concentration factor also vary.It is very useful for anti-explosion design.
【Fund】: 国家自然科学基金资助项目(50874039);; 河南省杰出青年计划基金资助项目(084100510004);; 河南省重点攻关基金资助项目(092102310313);; 河南理工大学博士基金资助项目(B2010-58)
【CateGory Index】: TU93
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