建筑结构多级设防烈度下的性能化抗震设计方法及工程应用
发布时间：2018-10-13 19:46
【摘要】：近年来的震害表明，地震造成的人员伤亡有所减少，但经济损失却越来越大。基于性能的抗震设计成为抗震设计规范发展的方向。本文结合基于位移角的抗震评估理论，针对抗震分析方法中简便有效的能力谱法，进行了以下研究工作： （1）利用SAP2000软件对三个不同类型的结构（框架、框剪、框筒），采用三种侧向力加载模式（均布、倒三角、模态）进行静力弹塑性分析。以屈服位移的倍数量化结构的不同弹塑性状态，研究不同弹塑性状态下结构的变形、顶点位移角和最大位移角的变化情况。 （2）研究了结构采用不同推覆方式获得的层间位移延性系数及不同推覆状态下的塑性角出现顺序及位置。 （3）对不同结构类型的自振周期经验公式进行分析，并与模态结果进行对比；研究结构在不同弹塑性状态下的瞬态周期。 （4）对三个结构模型进行增量动力分析，，得到多条地震记录的基于IDA能力曲线，研究随着地震强度的增大，结构顶点位移角、最大层间位移角及变形曲线的变化规律；建立位移角和地震影响系数的关系曲线；进行基于IDA与Pushover的结构抗震能力比较。 （5）介绍不同烈度下结构抗震评估新方法。将Sa-Sd曲线转化成α-Sd曲线，然后通过不同烈度下的地震作用与α-Sd曲线比较，确定小震阶段和大震阶段在不同烈度下的性能交点，用顶点位移角和最大层间位移角评估结构的抗震性能。
[Abstract]:The earthquake damage in recent years shows that the casualties caused by the earthquake have been reduced, but the economic losses are increasing. Performance-based seismic design has become the development direction of seismic design code. Based on the displacement angle based seismic assessment theory, the following research work is carried out in this paper: (1) three different types of structures (frame, frame shear, frame shear) are studied by using SAP2000 software, which is a simple and effective method for seismic analysis. Three lateral loading modes (uniform distribution, inverted triangle, mode) are used for static elastic-plastic analysis. The deformation of structures under different elastic-plastic states is studied by quantifying the different elastic-plastic states of structures with multiple yield displacements. (2) the order and position of the ductility coefficient of interstory displacement and the occurrence order of plastic angle under different nappe states are studied. (3) the empirical formula of natural vibration period of different structural types is analyzed. Compared with the modal results, the transient periods of structures under different elastic-plastic states are studied. (4) the incremental dynamic analysis of three structural models is carried out, and the multiple seismic records based on IDA capability curves are obtained. With the increase of earthquake intensity, the variation law of the displacement angle of the structure vertex, the maximum interstory displacement angle and the deformation curve are studied, and the relation curve between the displacement angle and the seismic influence coefficient is established. The seismic capacity of structures based on IDA and Pushover is compared. (5) A new method for seismic evaluation of structures with different intensity is introduced. The Sa-Sd curve is transformed into 伪-Sd curve, and then, by comparing the seismic action under different intensity and 伪-Sd curve, the performance intersection of small earthquake stage and large earthquake stage under different intensity is determined. The aseismic performance of the structure is evaluated by using the vertex displacement angle and the maximum interstory displacement angle.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU352.11
本文编号：2269707
[Abstract]:The earthquake damage in recent years shows that the casualties caused by the earthquake have been reduced, but the economic losses are increasing. Performance-based seismic design has become the development direction of seismic design code. Based on the displacement angle based seismic assessment theory, the following research work is carried out in this paper: (1) three different types of structures (frame, frame shear, frame shear) are studied by using SAP2000 software, which is a simple and effective method for seismic analysis. Three lateral loading modes (uniform distribution, inverted triangle, mode) are used for static elastic-plastic analysis. The deformation of structures under different elastic-plastic states is studied by quantifying the different elastic-plastic states of structures with multiple yield displacements. (2) the order and position of the ductility coefficient of interstory displacement and the occurrence order of plastic angle under different nappe states are studied. (3) the empirical formula of natural vibration period of different structural types is analyzed. Compared with the modal results, the transient periods of structures under different elastic-plastic states are studied. (4) the incremental dynamic analysis of three structural models is carried out, and the multiple seismic records based on IDA capability curves are obtained. With the increase of earthquake intensity, the variation law of the displacement angle of the structure vertex, the maximum interstory displacement angle and the deformation curve are studied, and the relation curve between the displacement angle and the seismic influence coefficient is established. The seismic capacity of structures based on IDA and Pushover is compared. (5) A new method for seismic evaluation of structures with different intensity is introduced. The Sa-Sd curve is transformed into 伪-Sd curve, and then, by comparing the seismic action under different intensity and 伪-Sd curve, the performance intersection of small earthquake stage and large earthquake stage under different intensity is determined. The aseismic performance of the structure is evaluated by using the vertex displacement angle and the maximum interstory displacement angle.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU352.11
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