基于耗散结构理论,从能量理论角度对煤矿开采区建筑物的动力破坏过程进行了系统的定量分析.提出了建筑物能量耗散的理论判据,研究了地震作用下煤矿开采区建筑的损伤演化灾变过程.根据结构动力学理论,建立了煤矿开采区建筑物在地震作用下的能量演化平衡方程,定量分析了地震作用下煤矿开采区建筑物系统中耗散能量的变化过程.结果表明:在开采沉陷和地震联合作用下,建筑物与外界产生更多的有害的能量交换,进而产生更多的塑性损伤变形,结构阻尼耗能降低;根据建筑物能量耗散演化趋势应建立合适的抗开采沉陷变形隔震保护新体系,为我国矿区建筑物保护提供借鉴意义.
Based on the dissipative structure theory,we quantificationally analyze the dynamic failure process of the building in coal-mining areas by energy theory.The energy dissipation theory criterion of buildings is proposed,and the damage evolution process of building in coal-mining areas caused by earthquake is studied.According to the theory of structural dynamics,the energy evolution balance equation of the buildings in coal-mining areas under the effect of earthquake is established,and the changing process of energy dissipation in building system which caused by the coupling effect of earthquake in coal mine exploration area is quantificationally analyzed.It's shown that the buildings produce more harmful energy exchange with the outside environment under the couple effect of mining subsidence and earthquakes,and produce more plastic damage deformation,at the same time,the structural damping reduce.According to the evolution trend of energy dissipation,a new isolation protection system to keep buildings from the subsidence deformation should be established,and it could provide the reference for protecting the buildings in mining areas in China.