钢筋混凝土框架—剪力墙结构基于损伤指标的安全性鉴定方法研究

发布时间：2018-06-18 19:04

本文选题：震损鉴定 + 框架-剪力墙结构　；参考：《中国地震局工程力学研究所》2014年硕士论文

【摘要】：震后重建期间对受震建筑进行准确的震损鉴定可为安全、经济合理地进行房屋加固提供可靠的基础信息。目前，结构地震现场损伤鉴定工作还主要依据专家的视觉判断，并依据经验给出判断结果。这样的方法难以避免由于鉴定者对结构震害现象的理解不同而导致的鉴定结果的偏差，鉴定结论客观性不足。本文针对典型的框架-剪力墙结构，以损伤指标为关键指标对结构震后的安全性鉴定进行研究，为鉴定人员进行安全性鉴定提供定量的理论依据。并分别从部分构件损伤指标未知和部分楼层损伤指标未知两个方面来研究其对结构整体损伤评定的影响。论文主要工作如下：（1）对国内外计算钢筋混凝土各构件的损伤指标计算方法进行了归纳和总结，以一典型的18层框架-剪力墙结构为研究对象，，建立起ABAQUS有限元模型，研究不同类型构件损伤指标计算方法。（2）研究根据各构件的损伤指标计算整体结构的损伤指标的方法，对框架-剪力墙结构算例进行IDA分析求出其对应的整体损伤指标，并与基于层间最大变形的结构损伤评定方法进行比较，确定基于构件损伤指标量化整体结构损伤指标的方法的合理性。（3）研究当无法观察到结构全部构件或全部楼层损伤状态的情况下，如何计算结构整体损伤指标的方法，并将其结果与用全部构件求出的整体损伤指标相比较，根据比较得到的变化率来判断其合理性，为震后现场结构损伤鉴定提供理论依据。本方法可改善钢筋混凝土结构震后安全性鉴定的客观性、准确性，同时提高该项工作的效率，具有非常重要的实际意义和很好的应用前景。
[Abstract]:Accurate identification of earthquake damage during post-earthquake reconstruction can provide reliable basic information for building strengthening safely and economically. At present, the work of structural damage identification is mainly based on the visual judgment of the experts, and the result is given according to the experience. This method is difficult to avoid the deviation of identification results caused by the different understanding of earthquake damage phenomenon of structures, and the objectivity of identification conclusions is insufficient. Aiming at the typical frame-shear wall structure, the damage index is taken as the key index to study the safety identification of the structure after the earthquake, which provides a quantitative theoretical basis for the safety appraisal of the appraiser. The influence of the damage index of some members and the damage index of part floor on the whole damage assessment of the structure is studied respectively from two aspects: the damage index of some members is unknown and the damage index of part floor is unknown. The main work of this paper is as follows: (1) the methods for calculating damage index of reinforced concrete members at home and abroad are summarized and summarized. A typical 18-story frame-shear wall structure is taken as the research object. Abaqus finite element model is established to study the methods of calculating damage index of different types of components. (2) the method of calculating damage index of whole structure according to damage index of each component is studied. The whole damage index of frame-shear wall structure is obtained by IDA analysis and compared with the damage assessment method based on the maximum deformation between floors. The rationality of the method of quantifying the damage index of the whole structure based on the damage index of the component. (3) the method of calculating the damage index of the whole structure is studied when the damage state of all the components or all floors of the structure can not be observed. The result is compared with the whole damage index calculated by all the components, and the rationality of the damage index is judged according to the rate of change, which provides a theoretical basis for the field structural damage identification after the earthquake. This method can improve the objectivity and accuracy of post-earthquake safety appraisal of reinforced concrete structures and improve the efficiency of the work. It has very important practical significance and good application prospect.
【学位授予单位】：中国地震局工程力学研究所
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU317

【参考文献】