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木建筑由于结构冗余性以及钉接节点超强的吸能耗能能力在抗震中表现良好.交叉层积木是一种新型的建筑材料.本文以交叉层积木3种柔性连接试验为基础,采用Open Sees中Pinching4自定义模型模拟连接滞回曲线的高度非线性、强度退化、刚度退化和捏拢现象.基于主次半循环累积能量的损伤模型,对交叉层积木连接进行损伤分析,并提出该连接的5种性能水平的损伤指数.Pinching4模型与连接试验结果吻合较好,进一步证明该模型模拟木节点连接性能的可行性和有效性.损伤因子对应的损伤程度基本符合试验规律,其平均值在合理范围内,计算结果离散性较低.
Due to the structural redundancy and the energy-absorbing and energy-absorbing ability of the spliced joints, the wood building performs well in earthquake resistance.The cross-layer building block is a new kind of building material.Based on the three kinds of flexible connection test of the cross-layer building block, In the Open Sees Pinching4 custom model, the nonlinear hysteresis curve is highly nonlinear, the strength degenerates, the stiffness degenerates and the pinch-in phenomenon.According to the primary and secondary semi-cycle cumulative energy damage model, The results showed that the Pinching4 model is in good agreement with the connection test, which further proves the feasibility and effectiveness of this model in simulating the connection of wood nodes.The damage degree corresponding to the damage factor basically conforms to the experimental rule, and the average value Within a reasonable range, the calculation results are less discrete.