爆炸载荷作用下RC板的能量法优化设计

Optimal design for a simple supported one-way RC slab against blast loads using energy method

由能量法可知,钢筋混凝土(RC)板的抗力—位移(R-y)曲线下方面积代表板在爆炸荷载作用下可能吸收的能量。分析不同配筋率的R-y曲线下方面积,面积最大时的配筋率即可定义为相应设计的最佳配筋率。考虑材料非线性及高应变率对混凝土和钢筋强度的影响,采用分层法迭代求解抗力—挠度(R-y)曲线。研究成果可供受爆炸荷载的RC板优化设计借鉴。

According to energy method, the area （RC） slab represents the energy which a RC slab areas under the resistance-deflection curves of RC under resistance-deflection （R-y） curve of reinforced concrete can absorb when it is subjected to blast loads. Comparing the slabs with various reinforcement ratios, the reinforcement ratio corresponding to the biggest area can be defined as an optimal reinforcement ratio. Because the nonlinearity of the material and the high strain ratio have some impacts on the reinforced concrete and reinforcing steel, the layered method is used to determine the resistance-deflection curves and to model the dynamic response of slabs. The results are very useful for the optimal design of RC simple supported one-way slabs.