(1. Engineering Institute of Corps Engineers and College of Science,PLA University of Science and Technology,Nanjing,Jiangsu,210007,China;2. Key Laboratory of Bridge-structure Engineering,Chongqing Jiaotong University,Chongqing 400074,China;3. Department of Architectural Engineering,Engineering College of Chinese Armed Police Force,Xi?an,Shaanxi 710086,China;4. Key Laboratory of Structural Analysis for Defense Engineering and Equipment,Hohai University,Nanjing,Jiangsu 210098,China)
Abstract:When the centre of explosion is at one side of structure,only part of the structure will subject to explosion load. In this condition,the inner stress and the types of failure of the structure will change greatly. Load distribution is discussed for side blast. The calculation of load is given out. A damping action is used to replace the interaction between structure and the surrounding soil. So the soil-structure interaction is inserted into the controlling equation. And then the exact solution can be obtained by solving the equation. Method is obtained to calculate reaction of the structure when the centre of explosion is in arbitrary position far enough from the structure. And the distribution of displacement and maximum moment are got for side blast.
[1] MA G W,ZHOU H Y,LU Y,et al. In-structure shock of underground structures:A theoretical approach[J]. Engineering Structures,2010,32(12):3 836–3 844.
[2] GJELSVIK A,BODNER S R. Analytical and differential quadrature results for vibration analysis of damaged circular arches [J]. Journal of Sound and Vibration,2005,288:887–906.
[3] PLAUT R H,JOHNSON E R. The effects of initial thrust and elastic foundation on the vibration frequencies of a shallow arch[J]. Journal of Sound and Vibration,1981,78(4):565–571.
[4] KANG K J,BERT C W,STRIZ A G. Vibration and buckling analysis of circular arches using DQM[J]. Computers and Structures,1996,60(1):49–57.
[5] CHIDAMPARAM P,LEISSA A W. Influence of centerline extensibility on the in-plane free vibrations of loaded circular arches[J]. Journal of Sound and Vibration,1995,183(5):779–795.
[6] 赵以贤,王良国. 爆炸荷载作用下地下拱形结构动态分析[J]. 爆炸与冲击. 1995,15(3):201–211.(ZHAO Yixian,WANG Liangguo. Dynamic analysis of underground arch structure subject to blast load[J]. 1995,15(3):201–211.(in Chinese))
[7] 钱七虎,王明洋. 高等防护结构计算理论[M]. 南京:江苏科学技术出版社,2009:315–316.(QIAN Qihu,WANG Mingyang. Calculation theory for advanced protective structures[M]. Nanjing:Jiangsu Science and Technology Press,2009:315–316.(in Chinese))
[8] MILLER C A,COSTANTINO C J. Structure-foundation interaction of a nuclear power plant with a seismic disturbance[J]. Nuclear Engineering and Design,1970,14(2):332–342.
[9] WEIDLINGER P,HINMAN E. Analysis of underground protective structures[J]. Journal of Structural Engineering,1988,114(7):1 658–1 673.
[10] WONG F S,WEIDLINGER P. Design of underground protective structures [J]. Journal of Structural Engineering,ASCE,1983,109(8):1 972–1979.
[11] HENRYCH J. The dynamics of arches and frames[M]. [S.l.]:[s.n.],1981:133–135.