Elastic responses of underground circular arches considering dynamic soil-structure interaction:A theoretical analysis  

作　　者：Hai-Long Chen Feng-Nian Jin Hua-Lin Fan 

机构地区：[1]PLA University of Science and Technology [2]Key Laboratory of Bridge-structure Engineering, Chongqing Jiaotong University [3]Laboratory of Structural Analysis for Defense Engineering and Equipment, College of Mechanics and Materials, Hohai University [4]Key Laboratory of Road & Bridge and Underground Engineering of Gansu Province, Lanzhou Jiaotong University

出　　处：《Acta Mechanica Sinica》2013年第1期110-122,共13页力学学报（英文版）

基　　金：supported by the Funds for Creative Research Groups of China(51021001);the National Natural Science Foundation of China(51078351);Program for New Century Excellent Talents in University,Fund of Key Laboratory of Bridge-structure Engineering and Open Fund of Key Laboratory of Road & Bridge and Underground Engineering of Gansu Province(KFJJ-11-03)

摘　　要：Due to the wide applications of arches in underground protective structures, dynamic analysis of circular arches including soil-structure interactions is important. In this paper, an exact solution of the forced vibration of circular arches subjected to subsurface denotation forces is obtained. The dynamic soil-structure interaction is considered with the introduction of an interfacial damping between the structure element and the surrounding soil into the equa- tion of motion. By neglecting the influences of shear, rotary inertia and tangential forces and assuming the arch incompressible, the equations of motion of the buried arches were set up. Analytical solutions of the dynamic responses of the protective arches were deduced by means of modal super- position. Arches with different opening angles, acoustic impedances and rise-span ratios were analyzed to discuss their influences on an arch. The theoretical analysis suggests blast loads for elastic designs and predicts the potential failure modes for buried protective arches.Due to the wide applications of arches in underground protective structures, dynamic analysis of circular arches including soil-structure interactions is important. In this paper, an exact solution of the forced vibration of circular arches subjected to subsurface denotation forces is obtained. The dynamic soil-structure interaction is considered with the introduction of an interfacial damping between the structure element and the surrounding soil into the equa- tion of motion. By neglecting the influences of shear, rotary inertia and tangential forces and assuming the arch incompressible, the equations of motion of the buried arches were set up. Analytical solutions of the dynamic responses of the protective arches were deduced by means of modal super- position. Arches with different opening angles, acoustic impedances and rise-span ratios were analyzed to discuss their influences on an arch. The theoretical analysis suggests blast loads for elastic designs and predicts the potential failure modes for buried protective arches.

关 键 词：Underground protective arches - Dynamic soilstructure interaction Dynamic responses Analytical solution 

分 类 号：TU93[建筑科学—结构工程] TU435