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为防护爆炸冲击波对建筑物的破坏作用,提出了一种新型钢板-混凝土组合结构,分析了组合结构在爆炸冲击波作用下的变形及变形吸能特性。采用单向构件在均布荷载作用下的抗力分析方法,推导了基于极限抗弯承载力的组合结构极限抗力的计算公式;采用单向构件在冲量荷载下的动力响应分析方法,对组合结构的整体变形进行了分析,推导了基于大挠度变形的组合结构变形以及变形吸能计算公式,系统分析了爆炸当量、结构高度、结构厚度等因素对组合结构变形的影响。结果表明,随着爆炸当量、结构高度增大,结构厚度以及钢板厚度减小,组合结构墙体转角增大,变形加剧。
In order to defend the damaging effect of blast shock wave on buildings, a new type of steel-concrete composite structure is proposed. The deformation and energy absorption and deformation characteristics of the composite structure under blast shock wave are analyzed. Based on the analysis of the resistance of unidirectional members under uniform load, the formula for calculating the ultimate resistance of composite structures based on ultimate flexural capacity was deduced. By using the dynamic response analysis of unidirectional members under impulse load, The deformation of the composite structure is deduced, and the calculation formula of the deformation and energy absorption of the composite structure based on the large deflection deformation is deduced. The influence of explosion equivalent, structure height and structure thickness on the deformation of the composite structure is systematically analyzed. The results show that with the explosion equivalent, the height of the structure increases, the thickness of the structure and the thickness of the steel plate decrease, and the angle of rotation of the combined structure wall increases and the deformation increases.