V型偏心支撑钢框架滞回能需求层间分布及影响因素
发布时间：2018-12-16 23:58
【摘要】：我国的抗震规范采用基于承载力的设计方法,没有考虑强震持时的影响。基于能量的抗震设计方法能同时考虑力、位移、持时等因素,可全面评估结构的破坏程度。本文运用SAP2000设计了10层3跨、15层三跨、20层3跨三种V型偏心支撑钢框架,在ABAQUS有限元分析软件中采用梁-壳混合模型,输入选定的20条远场地震波和15条带有脉冲效应的近场地震波,对三种算例进行了时程分析,主要工作如下：1.得到了三种算例在远、近场地震8度罕遇水准下的层间滞回能大小、滞回能层间分布规律、耗能梁段滞回能所占的比例、层间位移角；通过回归分析,得到了三个算例远、近场地震下滞回能层间分布系数的简化计算公式。2.通过对远、近场地震下V型偏心支撑钢框架滞回能层间分布规律及层间位移角的分析,表明近场地震会加大结构底部反应,按我国抗震规范设计的V型偏心支撑钢框架低估了带有脉冲效应近场地震对结构的作用。3.分析了地震动特性和结构自身特性对滞回能层间分布的影响。
[Abstract]:The design method based on bearing capacity is adopted in the seismic code of our country, and the influence of strong earthquake duration is not taken into account. The seismic design method based on energy can consider the factors of force, displacement and duration at the same time, so it can comprehensively evaluate the damage degree of the structure. In this paper, three kinds of V-type eccentric braced steel frames are designed by using SAP2000, including 10 story 3 span, 15 story 3 span and 20 story 3 span. The beam-shell hybrid model is used in the ABAQUS finite element analysis software. In this paper, 20 far-field seismic waves and 15 near-field seismic waves with pulse effect are inputted, and three examples are analyzed. The main work is as follows: 1. The magnitude of interlayer hysteretic energy, the distribution of energy between layers, the proportion of hysteretic energy in energy-consuming beam section, and the displacement angle between layers are obtained. By means of regression analysis, a simplified formula for calculating the distribution coefficient of hysteresis energy layers under near-field earthquakes is obtained for three examples. 2. By analyzing the distribution of hysteretic energy and the displacement angle between layers of V-type eccentrically braced steel frame under far-field and near-field earthquakes, it is shown that near-field earthquake will increase the bottom response of the structure. The V-shaped eccentrically braced steel frame designed according to the seismic code of China underestimates the effect of near-field earthquake with pulse effect on the structure. The effects of ground motion characteristics and structure characteristics on the distribution of hysteretic energy layers are analyzed.
【学位授予单位】：苏州科技学院
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU391
[Abstract]:The design method based on bearing capacity is adopted in the seismic code of our country, and the influence of strong earthquake duration is not taken into account. The seismic design method based on energy can consider the factors of force, displacement and duration at the same time, so it can comprehensively evaluate the damage degree of the structure. In this paper, three kinds of V-type eccentric braced steel frames are designed by using SAP2000, including 10 story 3 span, 15 story 3 span and 20 story 3 span. The beam-shell hybrid model is used in the ABAQUS finite element analysis software. In this paper, 20 far-field seismic waves and 15 near-field seismic waves with pulse effect are inputted, and three examples are analyzed. The main work is as follows: 1. The magnitude of interlayer hysteretic energy, the distribution of energy between layers, the proportion of hysteretic energy in energy-consuming beam section, and the displacement angle between layers are obtained. By means of regression analysis, a simplified formula for calculating the distribution coefficient of hysteresis energy layers under near-field earthquakes is obtained for three examples. 2. By analyzing the distribution of hysteretic energy and the displacement angle between layers of V-type eccentrically braced steel frame under far-field and near-field earthquakes, it is shown that near-field earthquake will increase the bottom response of the structure. The V-shaped eccentrically braced steel frame designed according to the seismic code of China underestimates the effect of near-field earthquake with pulse effect on the structure. The effects of ground motion characteristics and structure characteristics on the distribution of hysteretic energy layers are analyzed.
【学位授予单位】：苏州科技学院
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU391
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