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以钢管桁架K型相贯管节点及中空夹层钢管混凝土加强节点为研究对象,展开抗冲击性能研究。首先,介绍了冲击荷载作用的分析方法,然后在ANSYS/LS-DYNA软件中建立了K型节点及加强节点冲击模型,不断变换冲击物的质量和速度对节点进行冲击。结果表明,节点加强后对于具体冲击形态影响不大,主要影响相应破坏形态的临界冲击能量;节点加强后冲击荷载响应增大,但是位移、塑性应变等动力响应均降低;节点所吸收的能量也明显降低,最多可降低51.98%。
Taking K-type tubular cross-section pipe joints and reinforced concrete filled steel tube reinforced joints as the research object, anti-impact performance was studied. First of all, the analysis method of impact load is introduced. Then K-node and node-impact model are established in ANSYS / LS-DYNA software to change the mass and velocity of impact object. The results show that the strengthened nodes have little effect on the specific impact modes, which mainly affect the critical impact energy of the corresponding failure modes. The impact load response increases when the nodes are strengthened, but the dynamic responses such as displacement and plastic strain decrease. The energy absorbed by nodes Significantly lower, up to 51.98% lower.