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基于材料考虑损伤累积的精细化本构模型,通过全过程分析方法,考察材料损伤累积对结构抗震性能和失效特征的影响。结果表明,考虑材料损伤累积将显著降低结构的失效极限荷载;通过大规模参数分析,获得单层柱面网壳结构响应随不同的矢跨比、屋面质量、初始缺陷、长宽比和地震动的变化规律;随着矢跨比、屋面质量、初始缺陷的减小,结构的失效极限荷载显著增大,塑性发展范围更广,塑性发展程度更深;随着长宽比增加,结构的失效极限荷载显著提高;随着地震动荷载的改变,结构的失效极限荷载显著改变,并且失效极限荷载的大小与结构的塑性发展程度并没有显著的关联。
Based on the refined constitutive model considering the cumulative damage of the material, the impact of the material damage accumulation on the seismic performance and failure characteristics of the structure is investigated through the whole process analysis method. The results show that considering the material damage accumulation, the ultimate failure load of the structure will be significantly reduced. The response of the single-layer reticulated shell structure with different span-span ratios, roof quality, initial defects, aspect ratio and ground motion With the ratio of span to span, the quality of roof and the decrease of initial defects, the ultimate failure load of the structure significantly increases, the plasticity develops more extensively and the plasticity develops more deeply. As the aspect ratio increases, the failure limit of the structure The load is significantly increased. With the change of seismic load, the ultimate failure load of the structure changes significantly, and there is no significant correlation between the ultimate load and the plastic extent of the structure.