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中文摘要：
采用壳单元建立网壳结构的精细化模型时,模型中的壳单元在两个方向均有正应变,因此在双向都会出现损伤.为满足结构失效分析时考虑损伤累积的需要,建立了适合壳单元的双向损伤本构模型,通过与常用的梁单元杆件损伤分析结果对比,验证了新建损伤模型的合理性.最后给出了一个单层柱面网壳模型的算例,由分析结果可知,由于损伤累积的影响,模型的失稳时间明显提前了.
英文摘要：
The members of hollow spherical joints and tubes in the fine reticulated shell model are built by shell elements which have two direct strains in the constitutive model. Therefore the damage accumulation happens in these two directions. The previous single-direction damage model can＇t be used directly. In order to meet the need of the research, an appropriate bidirection damage constitutive model is built for shell element based on the previous damage variable model. The new model is fit for shell element and can meet the request of precision by comparing the FEA （finite element analysis） results with those from beam element tube. A single-layer cylindrical reticulated shell under strong earthquake excitation is analyzed. The result which takes the damage accumulation into consideration shows the structural instability is happened earlier than that of ignoring damage accumulation.
同期刊论文项目
同项目期刊论文
Effect of substructures upon failure behavior of steel reticulated domes subjected to the severe ear
单层鞍形网壳考虑材料损伤累积的强震失效机理研究Failure Mechanism of Single-layer Saddle-curve Reticulated Shells with Materi
Application of Incremental Dynamic Analysis in the Collapse Evaluation of Single-layer Latticed Dome
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