馆藏可移动文物防震性能研究

发布时间：2018-01-02 12:27

本文关键词：馆藏可移动文物防震性能研究　出处：《北京交通大学》2013年硕士论文　论文类型：学位论文

【摘要】：我国是一个多地震的国家,每次地震对馆藏可移动文物的破坏极其严重,这一问题受到国家相关部门的高度重视,《馆藏可移动文物防震规范》的编写被提上日程。对馆藏可移动文物防震性能研究提供科学的、简明实用的、安全量化的评价参数是此项研究的关键。实际上,对动力放大系数和浮放滑移的研究具有重要的理论意义和工程应用价值。本课题以博物馆至文物这一振动传递环节为主线,以理论计算、模型试验、有限元分析三者相结合为手段,对楼层动力放大系数、展柜展台面动力放大系数、浮放滑移等关键问题进行研究。主要进行了如下几个方面内容的研究： 1.针对振动从博物馆传至楼地面第一环节,首先确定楼层动力放大系数的评价指标；然后依据《博物馆建筑设计规范》及现有博物馆实际工程,考虑各种因素,建立多种计算模型,并依据相应标准规范进行结构设计,采用数理统计方法得到楼层动力放大系数D1；最后研究不同结构体系的动力放大系数差异程度。 2.针对振动从楼地面传至展柜第二环节,通过展柜模型实验室试验,得到在不同地震激励作用下的固定展柜展台面的动力放大系数D2固和浮放展柜展台面的动力放大系数D2浮；并进行规律总结,为展柜模型数值模拟分析提供参考。 3.对固定展柜模型进行有限元计算分析,通过改变展柜高宽比、重心高度重要参数,得到不同地震激励作用下的固定展柜展台面的动力放大系数D2固；并与模型试验结果进行对比分析,确定固定展柜的动力放大系数D2固的合理范围,为实际工程设计提供参考。 4.对浮放展柜模型进行有限元计算分析,通过改变展柜高宽比、重心高度和展柜与地面之间摩擦系数重要参数,得到不同地震激励作用下的浮放展柜展台面的动力放大D2浮；并分析边界条件对展柜展台面放大系数的影响规律。通过以上研究内容,本文可得出以下结论：由楼层动力放大系数研究可得,混凝土结构建筑物的楼层动力放大系数D1的范围为1.00-3.15；钢结构建筑物楼层动力放大系数D1的范围为1.00-2.50。由展柜模型实验室试验可得,固定展柜展台面动力放大系数D2固的范围为1.00-2.00；浮放展柜展台面动力放大系数D2浮的范围为2.00以内。由固定展柜有限元分析可得,固定展柜展台面动力放大系数D2固的范围为1.00-2.42。由浮放展柜有限有分析可得,浮放展柜展台面动力放大系数D2浮的范围为2.00以内。
[Abstract]:China is a multi earthquake country, each earthquake on the collection of movable cultural relics damage is very serious, this problem is highly valued by the relevant departments of the state, "collection of cultural relics of earthquake specification writing was put on the agenda. The collection of cultural relics and shockproof performance, simple and practical that is the key to security quantitative evaluation parameters of the study. In fact, it has important theoretical significance and engineering application value to study the dynamic amplification coefficient and floating slip. The museum to cultural relics the vibration transmission link as the main line, to test the theoretical calculation, finite element analysis model, the combination of the three is means of floor dynamic magnification factor table dynamic magnification factor Showcase exhibition, researches the key issues of floating slip. The research mainly includes the following several aspects:
1. according to the vibration from the floor to the Museum of the first part, firstly, determining the evaluation index of floor dynamic magnification factor; then based on the design specifications and the existing museum museum building < > the actual project, considering various factors, the establishment of a variety of models, and according to the corresponding standard Specification for structural design, using the method of mathematical statistics to get the floor dynamic amplification factor D1; finally, study on the dynamic magnification factor of different structure differences.
2. according to the vibration from the ground floor to showcase the second link, the showcase model experiment in the laboratory, power obtained under different earthquake excitations under fixed surface magnification D2 exhibition showcase Showcase exhibition and solid floating table amplification coefficient of D2 floating; and sum up the law, provide reference for numerical simulation. The model analysis of Showcase
Finite element analysis of 3. models by changing the fixed showcase, showcase the aspect ratio, the height of the center of gravity of important parameters, dynamic different earthquake excitation fixed table magnification D2 Showcase exhibition solid; and compared with the results of model test, determine the dynamic amplification coefficient of fixed showcase a reasonable range of D2 solid, provide the reference for the engineering design.
4. of the floating showcase model to analyze the finite element calculation, by changing the display aspect ratio, friction coefficient between the important parameters and the height of the center of gravity and showcase ground, get different seismic excitations of floating mesa D2 floating exhibition showcase amplification; and to analyze the impact of boundary conditions on the amplification coefficient of exhibition cabinet table exhibition.
Through the above research content, this paper can draw the following conclusions:
By the floor dynamic magnification factor study, the scope of building concrete structure floor dynamic amplification factor D1 is 1.00-3.15; the range of steel structure building floor dynamic amplification coefficient D1 of the 1.00-2.50. model by laboratory tests to showcase, Showcase exhibition table dynamic range of fixed magnification coefficient of D2 solid is 1.00-2.00; range floating Showcase exhibition table the dynamic magnification factor of D2 floating for less than 2. By the finite element analysis can be fixed showcase, Showcase exhibition table fixed power amplification coefficient D2 fixed range is 1.00-2.42. by floating showcase finite analysis, the range of floating exhibition showcase dynamic magnification factor table D2 floating is less than 2.

【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU894

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