【摘要】：我國的抗震規(guī)范采用基于承載力的設計方法,沒有考慮強震持時的影響。基于能量的抗震設計方法能同時考慮力、位移、持時等因素,可全面評估結構的破壞程度。本文運用SAP2000設計了10層3跨、15層三跨、20層3跨三種V型偏心支撐鋼框架,在ABAQUS有限元分析軟件中采用梁-殼混合模型,輸入選定的20條遠場地震波和15條帶有脈沖效應的近場地震波,對三種算例進行了時程分析,主要工作如下：1.得到了三種算例在遠、近場地震8度罕遇水準下的層間滯回能大小、滯回能層間分布規(guī)律、耗能梁段滯回能所占的比例、層間位移角；通過回歸分析,得到了三個算例遠、近場地震下滯回能層間分布系數(shù)的簡化計算公式。2.通過對遠、近場地震下V型偏心支撐鋼框架滯回能層間分布規(guī)律及層間位移角的分析,表明近場地震會加大結構底部反應,按我國抗震規(guī)范設計的V型偏心支撐鋼框架低估了帶有脈沖效應近場地震對結構的作用。3.分析了地震動特性和結構自身特性對滯回能層間分布的影響。
[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.
【學位授予單位】：蘇州科技學院
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU391

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本文編號：2383276