钢板混凝土复合梁在爆炸荷载作用下的损伤评估研究

Damage assessment for steel-concrete composite beams subjected to blast loading

为满足钢板混凝土复合梁爆炸损伤评估的实际需要,完成了钢板混凝土复合梁与钢筋混凝土梁承载性能的比较试验,研究了两种梁的承载性能与破坏特点,获得了二者的抗力试验曲线、抗弯变形限值及抗力函数。基于钢板混凝土复合梁的等效单自由度运动方程,采用数值求解方法,得出了评估其在爆炸荷载作用下破坏状态的超压-冲量(P-I)等损伤曲线。研究结果表明:钢板混凝土复合梁的承载力、变形限值、临界超压以及临界冲量比钢筋混凝土梁的都要高,前者的抗爆性能更好。

In order to meet the practical needs of damage assessment for steel-concrete composite beams（ composite beams） subjected to blast loading,tests for load-bearing capacity of composite beams were conducted and compared with those for reinforced concrete beams. The load-bearing capacities and failure features of the two kinds of beams were studied,their experimental resistance curves,bending deformation limits and resistance functions were obtained. Based on the equivalent single-DOF motion equation of composite beams,the pressure-impulse（ P-I） isodamage curves for assessing their damage status were gained by means of the numerical simulation method. The study results showed that the loadbearing capacity,deformation limits,critical overpressure and critical impulse of composite beams are higher than those of reinforced concrete beams,so the formers beams have a better capacity of anti-blast loading.