大层高钢筋混凝土框架结构增设粘滞阻尼器试验研究
发布时间：2018-07-29 13:54
【摘要】：国内大量上世纪五六十年代建造的公共建筑由于使用年限较长、抗震设计标准低等原因亟需进行抗震加固,此类建筑多为大层高的框架结构,经计算此类框架在地震作用下弯矩起控制作用,并且由于建筑使用功能的需要存在结构刚度、质量沿高度分布不平均等缺陷,且由于使用功能要求无法各楼层同时进行施工改造,造成采用传统结构加固方式无法满足现行规范要求的情况。对既有建筑结构采用消能减震加固是近年来结构工程重要研究方向之一增设液体粘滞阻尼器是消能减震加固的重要手段,目前对框架结构增设液体粘滞阻尼器的研究主要针对剪切型破坏为主的常规框架而对弯曲型破坏为主的大层高钢筋混凝土框架研究较少,本文主要针对大层高的框架增设液体粘滞阻尼器进行研究,并且评价其减震效果,主要研究内容包括：1.该类型框架增设液体粘滞阻尼器在地震作用下结构响应,包括位移响应、加速度响应的研究；2.针对该类型框架仅部分薄弱楼层增设液体粘滞阻尼器的加固效果进行研究；3.对该类型框架结构制作模型进行振动台试验研究,比较增设液体粘滞模型与未增设液体粘滞阻尼模型结构地震响应；在试验与理论研究基础上,结合工程实例,对实际工程中的仅可在部分楼层增设粘滞阻尼器的抗震加固实例进行验算分析评估；此外,对某既有大层高框架结构采用不同消能减震加固方案进行计算对比分析,提出合理加固方案；将理论试验分析与实际工程相结合,为今后类似工程加固提供参考。
[Abstract]:A large number of public buildings built in the 1950s and 1960s in China are in urgent need of seismic reinforcement because of their long service life and low seismic design standards. Most of these buildings are large story tall frame structures. It is calculated that the bending moment of this kind of frame plays a controlling role under seismic action, and the structural stiffness and uneven distribution of mass along the height exist due to the need of building function. And because the function requirement can not carry on the construction transformation at the same time, the situation that the traditional structural strengthening method can not meet the requirements of the current code. In recent years, it is one of the important research directions of structural engineering to apply energy dissipation and vibration absorption and reinforcement to existing building structures. Adding liquid viscous dampers is an important means of energy dissipation and strengthening. At present, the research on the application of liquid viscous dampers to frame structures is mainly focused on conventional frames with shear failure and large story high reinforced concrete frames with flexural failure. In this paper, the application of liquid viscous dampers to large story high frames is studied, and the effect of damping is evaluated. The main research contents are as follows: 1. The structure response, including displacement response and acceleration response, is studied by adding liquid viscous damper to this type of frame. The reinforcement effect of liquid viscous dampers on the weak floors of this type of frame is studied. The shaking table test was carried out on the model of this kind of frame structure, and the seismic response of the structure with liquid viscosity model and no liquid viscous damping model was compared. An example of aseismic reinforcement with viscous dampers on some floors in actual engineering is analyzed and evaluated. In addition, the calculation and comparison of different energy dissipation and reinforcement schemes for an existing large-story frame structure are carried out. The reasonable reinforcement scheme is put forward, and the theoretical test analysis is combined with the practical engineering to provide a reference for the reinforcement of similar projects in the future.
【学位授予单位】：中冶集团建筑研究总院
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU375.4
本文编号：2152891
[Abstract]:A large number of public buildings built in the 1950s and 1960s in China are in urgent need of seismic reinforcement because of their long service life and low seismic design standards. Most of these buildings are large story tall frame structures. It is calculated that the bending moment of this kind of frame plays a controlling role under seismic action, and the structural stiffness and uneven distribution of mass along the height exist due to the need of building function. And because the function requirement can not carry on the construction transformation at the same time, the situation that the traditional structural strengthening method can not meet the requirements of the current code. In recent years, it is one of the important research directions of structural engineering to apply energy dissipation and vibration absorption and reinforcement to existing building structures. Adding liquid viscous dampers is an important means of energy dissipation and strengthening. At present, the research on the application of liquid viscous dampers to frame structures is mainly focused on conventional frames with shear failure and large story high reinforced concrete frames with flexural failure. In this paper, the application of liquid viscous dampers to large story high frames is studied, and the effect of damping is evaluated. The main research contents are as follows: 1. The structure response, including displacement response and acceleration response, is studied by adding liquid viscous damper to this type of frame. The reinforcement effect of liquid viscous dampers on the weak floors of this type of frame is studied. The shaking table test was carried out on the model of this kind of frame structure, and the seismic response of the structure with liquid viscosity model and no liquid viscous damping model was compared. An example of aseismic reinforcement with viscous dampers on some floors in actual engineering is analyzed and evaluated. In addition, the calculation and comparison of different energy dissipation and reinforcement schemes for an existing large-story frame structure are carried out. The reasonable reinforcement scheme is put forward, and the theoretical test analysis is combined with the practical engineering to provide a reference for the reinforcement of similar projects in the future.
【学位授予单位】：中冶集团建筑研究总院
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU375.4
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