高强钢组合K型偏心支撑框架结构动力弹塑性性能分析
发布时间：2018-08-13 16:26
【摘要】：高强钢组合K型偏心支撑框架是一种抗震性能良好、经济效益较高的抗震结构体系，适用于高烈度抗震设防地区的多、高层建筑。本文采用动力弹塑性分析方法，对不同强度钢材组合、不同耗能梁段长度的K型偏心支撑框架结构进行了抗震性能的有限元分析，并提出了相关设计建议。 论文采用ETABS软件设计了若干个不同强度钢材组合、不同耗能梁段长度的K型偏心支撑框架结构作为有限元分析的原型结构。然后，建立了实体单元和梁单元相结合的ABAQUS非线性有限元模型。材料本构选用考虑包辛格效应的双线性随动强化模型，同时考虑材料和几何的双重非线性。并参考已有试验，验证了有限元模型的有效性。在此基础上，选取三条合适的地震波对结构进行从7度多遇到9度罕遇共8种工况的时程分析，对比分析各结构的位移响应、剪力分配、内力响应及应力分布，研究了不同强度钢材组合和不同耗能梁段长度对K型偏心支撑框架结构动力弹塑性性能的影响。 最后，基于本文研究成果，得到以下结论：高强钢组合K型偏心支撑框架结构抗震性能略差于相同设计条件下的普通钢偏心支撑结构；Q345和Q460钢材组合的K型偏心支撑框架结构适宜于推广使用；建议适当减小高强钢组合K型偏心支撑框架结构的框架剪力调整系数；剪切屈服型高强钢组合K型偏心支撑框架结构的抗震性能优于弯曲屈服型结构；耗能梁段相对长度在（1.0-1.6）之间时，高强钢组合K型偏心支撑框架结构抗震性能较好。
[Abstract]:High-strength steel composite K-type eccentric braced frame is a kind of seismic structure system with good seismic performance and high economic benefit. It is suitable for many high-rise buildings in high intensity seismic fortification areas. In this paper, the dynamic elastic-plastic analysis method is used to analyze the seismic behavior of K-type eccentrically braced frame structures with different strength and different energy dissipation beam length, and the relevant design suggestions are put forward. In this paper, a number of K-type eccentrically braced frame structures with different strength and different energy dissipation beam length are designed by using ETABS software as the prototype structure for finite element analysis. Then, the ABAQUS nonlinear finite element model combining solid element with beam element is established. The material constitutive model takes into account the Bauschinger effect and the double nonlinearity of material and geometry. The validity of the finite element model is verified by referring to the existing experiments. On the basis of this, three suitable seismic waves are selected to analyze the time history of the structure under 8 working conditions from 7 to 9 degrees, and the displacement response, shear force distribution, internal force response and stress distribution of each structure are compared and analyzed. The influence of different strength steel combination and different energy dissipation beam length on dynamic elastoplastic properties of K type eccentrically braced frame structure is studied. Finally, based on the research results of this paper, the following conclusions are obtained: the seismic performance of high strength steel composite K eccentrically braced frame structure is slightly worse than that of common steel eccentrically braced structure under the same design conditions; The K-type eccentrically braced frame structure combined with Q345 and Q460 steel is suitable to be popularized and it is suggested that the shear adjustment coefficient of K-type eccentrically braced frame structure with high strength steel should be reduced appropriately. The seismic behavior of shear yield steel composite K eccentrically braced frame structure is better than that of flexural yield type frame structure, and when the relative length of energy dissipation beam is between 1.0-1.6, the seismic performance of high strength steel composite K eccentric braced frame structure is better.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU391;TU313
[Abstract]:High-strength steel composite K-type eccentric braced frame is a kind of seismic structure system with good seismic performance and high economic benefit. It is suitable for many high-rise buildings in high intensity seismic fortification areas. In this paper, the dynamic elastic-plastic analysis method is used to analyze the seismic behavior of K-type eccentrically braced frame structures with different strength and different energy dissipation beam length, and the relevant design suggestions are put forward. In this paper, a number of K-type eccentrically braced frame structures with different strength and different energy dissipation beam length are designed by using ETABS software as the prototype structure for finite element analysis. Then, the ABAQUS nonlinear finite element model combining solid element with beam element is established. The material constitutive model takes into account the Bauschinger effect and the double nonlinearity of material and geometry. The validity of the finite element model is verified by referring to the existing experiments. On the basis of this, three suitable seismic waves are selected to analyze the time history of the structure under 8 working conditions from 7 to 9 degrees, and the displacement response, shear force distribution, internal force response and stress distribution of each structure are compared and analyzed. The influence of different strength steel combination and different energy dissipation beam length on dynamic elastoplastic properties of K type eccentrically braced frame structure is studied. Finally, based on the research results of this paper, the following conclusions are obtained: the seismic performance of high strength steel composite K eccentrically braced frame structure is slightly worse than that of common steel eccentrically braced structure under the same design conditions; The K-type eccentrically braced frame structure combined with Q345 and Q460 steel is suitable to be popularized and it is suggested that the shear adjustment coefficient of K-type eccentrically braced frame structure with high strength steel should be reduced appropriately. The seismic behavior of shear yield steel composite K eccentrically braced frame structure is better than that of flexural yield type frame structure, and when the relative length of energy dissipation beam is between 1.0-1.6, the seismic performance of high strength steel composite K eccentric braced frame structure is better.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU391;TU313
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1 左咏梅;随安琦;;D型偏心支撑钢框架耗能梁段性能研究[J];工程建设与设计;2013年09期
2 易方民,高小旺,张维]，
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