Abstract：The theoretical formula of pseudo-static equivalent model for impact dynamic load of underground circular lining and its internal force extreme value solution is given based on the conservation of energy in this paper. The equivalent load forms of different impact are discussed.The theoretical solution of the extreme value of the internal force of the model under transient impact load is derived based on the free deformation method. The internal force calculation formula under different equivalent forms of impact loads is obtained and calculation results contrast with results of existing top blasting model test of circular tunnel. Preliminary validation of internal force and parameter efforts for circular lining under the blasting impact at the top of existing underground structure lining is compared with the model test results. It found that the equivalent model of triangular load is the nearest style with the model test in the equivalent form of all kinds of blasting load. The conclusion is that the theoretical results accord with experimental values very well and the equivalent impact loads form of triangular is most realistic in all equivalent forms. The proposed equivalent model of load and the extreme value of internal force formula are easy to be applied in engineering and design.
郭 璇1，孙文波2，张晓新3，岳焕闯2,马思远2. 地下圆形衬砌动载等效简易模型及内力极值解[J]. 振动与冲击, 2017, 36(20): 91-99.
Guo Xuan1, Sun Wen-bo2,Zhang Xiao-xin3, Yu Huan-chuang2，MA Siyuan2. PSEUDO-STATIC EQUIVALENT MODEL OF IMPACT DYNAMIC LOAD OF UNDERGROUND CIRCULAR LINING AND ITS INTERNAL FORCE EXTREME VALUE SOLUTION. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(20): 91-99.
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