正放四角锥平板网架楼盖地震易损性

发布时间：2018-04-02 20:16

本文选题：正放四角锥平板网架楼盖　切入点：强震响应　出处：《哈尔滨工业大学学报》2017年12期

【摘要】：地震易损性分析能准确评估结构抗震性能,为了提出一种网架结构地震易损性的研究方法,对正放四角锥平板网架结构开展了全荷载域时程分析研究其失效机理、参数敏感性分析研究各参数的影响程度、地震易损性分析评价其抗震性能.分析结果表明:网架结构破坏属于延性破坏,具有明显预兆;结构响应对钢材屈服强度、楼面荷载以及地震动记录的敏感性较大,后续分析中应视为随机性因素考虑;提出了适用于正放四角锥平板网架楼盖的地震损伤程度指标及震害等级划分标准,并给出针对该结构的地震易损性分析方法及步骤;分析发现结构在峰值加速度为0.40g(8度罕遇)时保证完好的概率仍有95%,即使出现0.62g(9度罕遇)强烈地震时,结构保证完好的概率仍能达到79%.正放四角锥平板网架楼盖具有较好的抗震性能,很大程度保证了结构的地震安全.
[Abstract]:Seismic vulnerability analysis can accurately evaluate the seismic performance of structure, in order to put forward a research method of seismic vulnerability of the grid structure, is four square pyramid grid structure to carry out the whole domain load time history analysis to study the failure mechanism, the parameter sensitivity analysis of the parameters of the degree of influence, analysis and evaluation of the seismic performance of seismic vulnerability results showed that belong to ductile failure grid structure has obvious sign; the response of the structure to the yield strength of steel, the floor load and record the greater sensitivity to subsequent analysis should be considered as random factors is put forward; Yu Zheng four square pyramid space truss floor seismic damage index and damage grade according to the standard, and gives the structure seismic vulnerability analysis methods and steps; analysis showed that the structure in the peak acceleration of 0.40g (8 degree rare) to ensure the end Good probability is still 95%. Even if 0.62g (9 degree rare) strong earthquakes occur, the probability of good structural integrity can still reach 79%.. The positive four angle pyramid flat grid floor has better seismic performance, which greatly ensures the seismic safety of the structure.

【作者单位】：结构工程灾变与控制教育部重点实验室(哈尔滨工业大学);土木工程智能防灾减灾工信部重点实验室(哈尔滨工业大学);
【基金】：国家科技支撑计划课题(2015BAK17B03) 国家自然科学基金(51525802,51778183)
【分类号】：TU356

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