钢纤维混凝土板抗爆数值模拟

钢纤维混凝土由于其优良的强度和延性而在防护结构中被广泛应用.对四边简支的钢纤维混凝土板在爆炸荷载作用下的响应进行了数值模拟,比较分析了折合距离、板厚度对其动态响应的影响.钢纤维混凝土的本构模型采用J-H-C模型,考虑了损伤和应变率效应.从计算结果可以看出,在炸药量相同的情况下,折合距离、板厚均对板中心的位移有较大的影响.研究成果可以对防护结构的设计提供理论参考.

Numerical simulation of steel-fiber concrete slab subjected to blasting load

Steel fiber concrete ( SFC) is w idely used in protect ive st ructures because of it s hig h st reng th and duct ility. T he dynamic respo nse of simply supported SFC slab under blast lo ad w as simulated by means of the finite element analysis of the three-dimensio nal model. The inf luences of scaled distance and the thickness of the SFC slab on the dynamic responses of slab w ere inv est ig ated and discussed. T he Jo hn- Holmquist-Co ok model w as used as the const itut ive model for the steel fiber concr ete, w ith the co nsideration of damag e and st rain rate effect in the abov e material model . It can be found f rom the result s that the scaled distance and the thickness of the slab g reatly influence the deflect ion o f the slab on co ndit ion o f the same quant ity of charg es. T he research r esult s can pro vide theoretical reference for to desig n of protect ive st ructures.