钢筋混凝土结构建筑群震害快速预测方法

Seismic damage prediction for reinforced concrete frame structures group

为对地震灾后的建筑物进行快速灾害评价与预测,建立了钢筋混凝土框架结构的震害类比预测方法.通过灰色关联度分析,选取对混凝土框架结构抗震性能影响较大的5个影响因子,基于结构薄弱层层间位移角的统计分析,得到各抗震性能影响因子的属性值;再通过熵权法计算各震害影响因子的权重;最后应用相似度加权计算公式计算不同混凝土框架结构的相似度,从而对群体混凝土框架结构的震害进行快速评估.为验证所提方法的有效性及可靠性,选取典型混凝土框架结构进行震害预测并与有限元分析结果进行比较.所提方法仅需从房屋普查资料中获取主要影响因子的信息,即可对钢筋混凝土结构群体进行快速、准确的震害预测.

In order to quickly assess and predict the earthquake damage,a new analogy method for reinforced concrete frame structure was proposed.Firstly,five key impact factors were determined on the basis of the grey correlation analysis.And then,the inner-story drift angles of vulnerability analysis were analyzed statistically and the attribute values of the main influence factors were obtained.After that,the weight of each influencing factor were determined by using the entropy-weight method.Finally,a similarity-weight formula was presented to analyze the similarity of different concrete frame structures,consequently the earthquake damage assessment and prediction can be performed quickly for concrete frame structure group.The damage predicted by the proposed method was compared with that by finite element analysis to validate the proposed method.The seismic damage of reinforced concrete frame structures group can be predicted based on several basic parameters obtained only from the general survey.