| 既有钢筋混凝土框架结构的多指标云模型地震损伤评估 |
| |
| 引用本文： | 何浩祥,赵鑫丽,程时涛.既有钢筋混凝土框架结构的多指标云模型地震损伤评估[J].世界地震工程,2023,39(1):059-68. |
| |
| 作者姓名： | 何浩祥 赵鑫丽 程时涛 |
| |
| 作者单位： | 北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124 |
| |
| 基金项目： | 国家重点研发计划项目课题(2017YFC1500604)；;国家自然科学基金项目(51878017)； |
| |
| 摘 要： | 目前的既有钢混结构地震损伤研究没有同时考虑不同抗震设计规范差异和耐久性两个因素对结构抗震性能的影响，且损伤指标较简单，在动力损伤分析中也存在局限。基于云模型的特点，提出了包括弹塑性耗能差率、刚度损伤指数、层间位移角和顶点位移角的多元结构损伤状态综合评估方法，能够同时考虑结构各损伤指数的随机性和模糊性。考虑不同版本抗震设计规范造成的结构性能差异和耐久性下降对结构性能的影响，设计3个典型五层钢混框架结构，进行增量动力分析，验证损伤评估方法的准确性。结果表明：随着抗震规范版本的更新，结构的损伤程度有适当减轻；同一结构的损伤程度因混凝土碳化作用先减轻后加重；采用弹塑性耗能差率表征既有结构的地震损伤效果优于刚度损伤指数；基于多指标云模型损伤评估方法获得的云模型综合隶属度和综合损伤值能够更加细化和精确地描述结构损伤状态。
|
| 关 键 词： | 既有结构 钢筋混凝土结构 损伤指数 损伤评估 云模型 |
Seismic damage assessment of existing reinforced concrete frame structures based on multi index cloud model |
| |
| HE Haoxiang,ZHAO Xinli,CHENG Shitao.Seismic damage assessment of existing reinforced concrete frame structures based on multi index cloud model[J].World Information On Earthquake Engineering,2023,39(1):059-68. |
| |
| Authors: | HE Haoxiang ZHAO Xinli CHENG Shitao |
| |
| Institution: | Beijing Key Lab of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China |
| |
| Abstract: | Abstract:The current research on seismic damage of existing reinforced concrete structures is lack of considering the influence of two typical factors together, which include the difference of different seismic design codes and durability degradation on the structural performance. Furthermore, the index represents structural damage is relatively single, which has limitations in dynamic damage analysis. Based on the characteristics of cloud model, and considering the structural responses of differential ratio of elastic plastic dissipated energy, the stiffness damage index, the interlayer drift ratio and the top drift ratio comprehensively, a multi-element comprehensive damage evaluation method is proposed, which can contain the randomness and fuzziness of each damage index together. Considering the structural inherent seismic performance difference caused by different seismic design codes and the influence of durability degradation on structural performance, three typical five story reinforced concrete frame structures are designed, and incremental dynamic analysis is carried out to verify the accuracy of damage assessment method. The results show that the structural damage degree decreases gradually with the update of the version of the seismic code. The damage degree of the same structure reduced firstly and then increased due to concrete carbonation develop, and the differential ratio of elastic plastic dissipated energy is better than the stiffness damage index to characterize the damage of existing structures. The comprehensive membership degree and comprehensive damage value of cloud model of structures calculated by the damage assessment method of multi index cloud model can describe the damage state more precisely. |
| |
| Keywords: | existing structure reinforced concrete structure damage index damage assessment cloud model |
|
| 点击此处可从《世界地震工程》浏览原始摘要信息 |
| 点击此处可从《世界地震工程》下载免费的PDF全文 |
