既有钢筋混凝土框架柱抗震性能对比研究

发布时间：2018-05-18 02:15

本文选题：地震作用影响 + 既有钢筋混凝土框架柱　；参考：《长安大学》2014年硕士论文

【摘要】：我国是一个多地震国家。近十年时间里，我国遭受了多次强烈地震，给地震灾区人民生命和财产造成了严重的损失。强烈地震的震害既暴露了我国建筑结构抗震设计方面存在的问题与不足，又充分肯定了唐山大地震以来所取得的巨大进步。从设计标准方面来讲，上个世纪70年代以前建造的框架结构大多没有考虑抗震设防；80年代建造的框架结构大部分是按照78版抗震规范设计，考虑了抗震设防并采取一定的抗震构造措施；90年代建造的框架结构是按照89版抗震规范设计，抗震设防有很大提高，抗震构造措施方面相对完善；进入新世纪以来，我国又先后颁布实施了01版、10版抗震规范，抗震设防和抗震构造措施方面更加完善合理。因此，对建造于不同时期的钢筋混凝土框架结构而言，其抗震性能水平必定存在差异。钢筋混凝土框架柱作为框架结构重要的竖向承重构件，在强烈地震作用下很容易发生破坏。从防震减灾的角度考虑，如果钢筋混凝土框架柱发生严重破坏并且很难修复，即使建筑物没有倒塌，但仍然需要拆除重新建造。所以，我们有必要研究钢筋混凝土框架柱的抗震性能水平，以保证其具有足够的地震承载力和良好的延性，避免在地震作用下发生破坏。基于此，本文通过新旧建筑抗震设计规范比较，利用ABAQUS软件对6根不同构造的钢筋混凝土框架柱进行有限元模拟，绘出其荷载-位移骨架曲线，由骨架曲线比较分析地震作用下既有钢筋混凝土框架柱的抗震性能。研究内容主要如下： (1)比较了钢筋混凝土框架柱在《工业与民用建筑抗震设计规范》TJ11-78、《建筑抗震设计规范》GBJ11-89和国家新颁布的《建筑抗震设计规范》GB50011-2010抗震构造措施方面的不同，，总结新旧规范各自抗震设计特点。 (2)参照低周反复荷载作用下钢筋混凝土框架柱的试验资料，选取6根不同构造的钢筋混凝土框架柱进行ABAQUS有限元模拟。 (3)讨论轴压比、箍筋设置、纵筋配筋率对钢筋混凝土框架柱抗震性能的影响。 (4)研究新旧规范关于既有钢筋混凝土框架柱抗震设计的影响，对于及时把握新规范的修订实质、发现既有框架结构存在的设计缺陷，并且对于既有框架结构的加固改造也具有参考意义。
[Abstract]:China is a country with many earthquakes. In the past ten years, our country has suffered many strong earthquakes, which has caused serious loss of life and property to the people in the earthquake-stricken area. The earthquake damage of the strong earthquake not only exposed the problems and shortcomings in the seismic design of building structures in China, but also fully affirmed the great progress made since the Tangshan earthquake. In terms of design standards, most of the frame structures built before the 1970s did not take into account seismic fortification. Most of the frame structures built in the 1980s were designed in accordance with the 78 edition of the seismic code. Considering seismic fortification and taking certain seismic structural measures the frame structure built in the 1990s is designed according to the 89 edition seismic code, the seismic fortification has been greatly improved, and the seismic structural measures have been relatively perfect; since the beginning of the new century, China has promulgated and implemented the tenth edition of the seismic code, the seismic fortification and seismic structural measures are more perfect and reasonable. Therefore, for reinforced concrete frame structures built in different periods, the seismic performance level must be different. As an important vertical bearing member of frame structure, reinforced concrete frame column is liable to damage under strong earthquake. From the point of view of earthquake prevention and mitigation, if the reinforced concrete frame column is seriously damaged and difficult to repair, even if the building does not collapse, it still needs to be demolished and rebuilt. Therefore, it is necessary for us to study the seismic performance of reinforced concrete frame columns in order to ensure their sufficient seismic bearing capacity and good ductility, and to avoid the damage under earthquake action. Based on this, through the comparison of new and old building seismic design codes, the finite element simulation of six reinforced concrete frame columns with different structures is carried out by using ABAQUS software, and the load-displacement skeleton curves are drawn. The seismic behavior of reinforced concrete frame columns under earthquake action is analyzed by comparison of skeleton curves. The main contents of the study are as follows: (1) the differences between reinforced concrete frame columns in the Code for Seismic Design of Industrial and Civil buildings (TJ11-78), the Code for aseismic Design of buildings (GBJ11-89) and the newly promulgated Code for aseismic Design of buildings (Code for Seismic Design of buildings) GB50011-2010 are compared. The characteristics of seismic design of new and old codes are summarized. According to the experimental data of reinforced concrete frame columns under low cyclic loading, six reinforced concrete frame columns with different structures are selected for ABAQUS finite element simulation. The effects of axial compression ratio, stirrups setting and reinforcement ratio on seismic behavior of reinforced concrete frame columns are discussed. 4) studying the influence of new and old codes on seismic design of existing reinforced concrete frame columns. In order to grasp the essence of the revision of the new code in time, the design defects of existing frame structures are found. It also has reference significance for the reinforcement and reconstruction of the existing frame structure.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU375.4;TU352.11

【参考文献】