砌体结构加固及加层隔震模型的非线性数值模拟

发布时间：2018-01-21 05:26

本文关键词： 砌体结构加固加层隔震外套结构弹塑性分析损伤　出处：《土木工程学报》2014年S2期 　论文类型：期刊论文

【摘要】：研究砌体结构采用外套预制钢筋混凝土墙板加固以及加层隔震后结构在大震作用下的非线性动力响应。基于通用大型有限元软件ABAQUS建立砌体结构模型、加固结构模型以及加层隔震模型,对这些模型进行大震作用下的动力弹塑性分析。计算结果表明,在大震作用下加固结构较原结构的砌体部分承担的地震响应大大减小,非线性损伤也大大减轻,基底剪力大部分由外套结构承担;加层隔震不但不会加大原有结构的地震作用,反而会削弱下部结构的地震作用,进一步减轻砌体部分的非线性损伤。通过分析表明,砌体结构采用外套预制钢筋混凝土墙板加固技术减轻地震响应和损伤,可以取得良好的加固效果,加层隔震后的加固效果更好,文中提出的加固方法具有良好的应用前景。
[Abstract]:The nonlinear dynamic response of masonry structures strengthened with precast reinforced concrete slabs and subjected to earthquake isolation is studied. The model of masonry structures is established based on the general finite element software ABAQUS. . The dynamic elastic-plastic analysis of these models under the action of strong earthquake is carried out, and the calculation results show that. Compared with the masonry part of the original structure, the seismic response of the strengthened structure is greatly reduced and the nonlinear damage is greatly reduced under the action of the strong earthquake, and the base shear force is mostly borne by the jacket structure. Adding story isolation not only does not increase the seismic action of the original structure, but also weakens the seismic action of the substructure and further reduces the nonlinear damage of the masonry part. Masonry structure with prefabricated reinforced concrete wall slab reinforcement technology to reduce the seismic response and damage, can achieve a good reinforcement effect, the addition of seismic isolation of the reinforcement effect is better. The reinforcement method proposed in this paper has a good application prospect.
【作者单位】：北京市建筑设计研究院有限公司;南京工业大学;
【分类号】：TU364
【正文快照】： 引言我国的砌体结构房屋分布广泛,绝大部分是建于20世纪50~80年代的住宅,这些房屋未考虑抗震设防,加上这些老旧住宅已使用30~60年,其抗震能力很低,难以抵御6级以上的破坏性地震,2008年四川汶川地震造成了相当严重的房屋震害[1-2],因此对既有老旧住宅进行抗震加固具有重要意义

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