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中文摘要：
为了研究爆炸荷载作用下钢筋混凝土梁板结构的面力效应,该文在钢筋混凝土梁板结构面力效应的静力分析模型基础上,结合弹粘塑性应变速率本构模型,将面力效应的静力分析模型推广应用于动载作用情况,采用单自由度法建立了考虑面力效应的钢筋混凝土梁板结构的动抗力模型,并编制了计算程序,理论计算结果与试验数据吻合较好。此外,利用所提出的分析方法对抗爆结构中常见的典型核爆和化爆荷载作用下的荷载的加载速率、轴向约束刚度和配筋率等主要影响因素进行了分析讨论,并指出：钢筋混凝土结构的面力效应随着加载速率、边界约束强度的提高和配筋率的降低而增强;动抗力提高程度越大,塑性变形也越大。
英文摘要：
To investigate the compressive membrane action of the reinforced concrete structures subjected to blast loads, a new analytical method was proposed, which can predict the dynamic responses of concrete beams with the action of membrane force under blast loads. The method was based on a single degree of freedom system, which combines an elasto-viscoplastic rate-sensitive material model with the Modified Membrane Design Force Method developed before. A good agreement was observed between the experimental data and the analytical results. The effects of the main parameters such as loading rates, restraint stiffness and reinforcement ratio on the structure subjected to the typical nuclear and chemical explosion loads were analyzed by the proposed analytical method. It was demonstrated that the dynamic resistance capacity increases with the increasing of loading rate as well as longitudinal restraint stiffness and decreasing of the tensile reinforcement ratio, but the more increasing of the dynamic resistance the larger plastic deformation.
同期刊论文项目
同项目期刊论文
Rate-sensitive Numerical Analysis of Dynamic Responses of Arched Blast Doors Subjected to Blast Load
Experimental and theoretical investigations on zonal disintegration phenomenon in the enclosing rock
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