摘要
为研究FRP网格-超高韧性水泥基复合材料(UHTCC)加固混凝土板的抗爆性能,用显式动力学软件ANSYS/LS-DYNA,建立了混凝土板、炸药、空气的有限元计算模型,对在空爆作用下未加固以及采用FRP网格-UHTCC加固下的混凝土板的跨中峰值位移以及破坏形态进行了数值模拟,并分析了考虑UHTCC厚度、UHTCC强度、网格间距等加固参数对混凝土板的损伤形态和跨中位移的影响。数值结果显示:混凝土板采用FRP网格-UHTCC加固后抗爆性能提升明显,且UHTCC厚度对混凝土板抗爆性能提升尤为显著,因此,如果想运用这种加固技术提高钢筋混凝土板的抗爆性能,应在规范的要求下,优先考虑增大UHTCC厚度。
In order to study the anti-blast performance of FRP grid-ultra-high toughness cement-based composites reinforced concrete slabs(UHTCC),a finite element model consisting of concrete slabs,explosives,and air was established by using the dynamics software ANSYS/LS-DYNA.Numerical simulations were carried out on the mid-span peak displacement and the failure mode of concrete slabs reinforced with FRP grid-UHTCC without reinforcement and with FRP grids under the load of airburst,while analyzing the effect of reinforcement parameters considering UHTCC thickness,UHTCC strength,and grid spacing on the damage pattern and mid-span displacement of the concrete slabs.The numerical results showed that the concrete slab reinforced by FRP grid-UHTCC shows obviously improved anti-explosion performance,and the UHTCC thickness has particularly significant effects on the anti-explosion performance.Therefore,if there is a need to improve the anti-explosion performance of reinforced concrete slabs with such reinforcement technology,priority should be given to increasing the thickness of UHTCC under the requirements of relevant specifications.
作者
钟伟
钟正强
Zhong Wei;Zhong Zhengqiang
出处
《重庆建筑》
2023年第10期54-57,共4页
Chongqing Architecture
