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给出大地震作用下下部结构对钢穹顶破坏性能影响的研究。全方位的动力响应分析法用于研究大地震下带下部结构的钢穹顶的破坏特性和自振特性。带下部结构的钢穹顶的2种典型破坏模式,被证明符合下部结构的刚度要求。建议将失效准则用于评估单层钢穹顶的极限强度。通过分析可知,在大地震作用下,下部结构对钢穹顶的失效特征和极限强度有很大的影响。所以在研究和设计阶段必须考虑下部结构。
The influence of substructure on the failure performance of steel dome under large earthquakes is given. A comprehensive dynamic response analysis method is used to study the failure characteristics and natural vibration characteristics of a steel dome with a substructure under a large earthquake. Two typical failure modes of a steel dome with a substructure proved to be in accordance with the stiffness requirements of the substructure. It is recommended that failure criteria be used to evaluate the ultimate strength of single-walled steel domes. Through the analysis we can see that under the action of a large earthquake, the substructure has a great influence on the failure characteristics and ultimate strength of the steel dome. So in the research and design stage must consider the substructure.