单钢板混凝土剪力墙抗爆性能研究

Blast resistance property of concrete shear wall with single-side steel plate

钢板混凝土剪力墙作为一种新型的抗侧力构件,具有良好的耗能能力和抗冲击性能,已逐渐应用于建筑工程结构的抗震和防护结构的抗爆设计。设计了3个试件,分别为普通钢筋混凝土板、单侧钢板混凝土板和夹心钢板混凝土板,开展了钢板混凝土剪力墙的接触爆炸试验,并通过非线性程序LS-DYNA建立了3个钢板混凝土剪力墙试件的数值模型,对比分析了不同试件在接触爆炸作用下的动态响应、破坏模式和抗爆性能。试验和数值分析结果表明:接触爆炸作用下,试验设计的3种试件呈现3种破坏模式;普通钢筋混凝土板中部发生混凝土贯穿破坏,钢筋发生较大弯曲变形;单侧钢板混凝土板由于栓钉拔出发生钢板和混凝土分离,丧失整体性和继续承载能力;夹心钢板混凝土板发生上层混凝土压碎,夹心钢板、上层和下层混凝土板连接性能较强,整体性较好,具有继续承载的能力,且夹心钢板混凝土板跨中挠度和混凝土碎块飞溅距离较小。单侧钢板混凝土板和夹心钢板混凝土板配置钢筋网可以显著增强混凝土层和钢板的连接性能,有效减小上下层混凝土的碎裂和剥落,增强其整体性和抗爆性能。

As a lateral resisting component,the single-side steel plate shear wall(SPSW)has a favorable capacity of energy dissipation and impact resistance,it has been gradually applied into the anti-seismic design of building and the antiexplosion design of protective structures.In this paper,three specimens of reinforced concrete slab(RCS),side steel plate shear wall slab(SSPSWS)and center steel plate shear wall slab(CSPWS)were designed and casted,the contact explosion experiment of SPSW were carried out in the field,and the nonlinear program LS-DYNA was used to establish finite model of SPSWS specimens,the dynamic response,failure models and anti-blast capacity of SPSWs subjected to contact explosion loads were compared and analyzed.The experimental results and numerical analysis show that there are three types of failure models occurred in the SPSWs,The midspan concrete of RCS occurrs penetration failure,and the reinforcement bar of RCS had larger bending deformation;while the concrete and steel plate of SSPSWS separate with the state of shear studs pulling out,losting its integrity and resistance capacity.The specimen of CSPWS is failure under upper concrete crushing,but the CSPWS specimen is still integrity and bearing capacity with strong connection performance.The midspan deflection of concrete slab and the splashing distance of concrete fragments are small.In addition,the capacity of bonding performance between concrete and steel plate of SSPSWS and CSPWS can be enhanced through equipping with reinforcing fabric,it can effectively reduce the cracking and peeling of the upper and lower layers of concrete and improve the integrity and antiexplosion capacity either.