【作者】 祁勇；

【导师】 钟树生；

【作者基本信息】 重庆大学 ， 结构工程， 2008， 硕士

【摘要】 针对目前工程中广泛应用但理论研究尚不完善的框支短肢剪力墙结构,本文通过对三榀墙肢宽厚比分别为5、6、7的斜柱式框支短肢剪力墙结构试件,在竖向荷载和水平低周反复荷载作用下的拟静力试验研究,对比分析斜柱式框支短肢剪力墙结构墙肢不同宽厚比试件的实验结果,得出墙肢宽厚比的变化对试件受力性能的影响,包括试件在整个试验过程中的宏观现象,各部分的应力应变分布情况。在试验和分析结果的基础上,揭示出该转换结构的在竖向荷载下的受力机理、承载能力、破坏形态以及水平荷载下的滞回特性、变形能力、延性系数等抗震耗能及其破坏机制等,揭示出采用斜柱式转换框支短肢剪力墙结构在竖向荷载下以及水平荷载下的抗震性能,从而为实际工程中这种斜柱式转换结构的合理设计提供了部分依据。试验结果表明,采用斜柱式转换的框支短肢剪力墙结构具有良好的的屈服及破坏机制,经过合理设计的框支短肢剪力墙结构具有良好的抗震性能。此类结构滞回曲线的滞回环饱满,具有较好的延性性能和耗能能力,各层刚度分布比较均匀,其弹性及弹塑性变形过程中各层变形性能较为稳定。随着短肢剪力墙墙肢肢厚比的增大,结构的刚度有明显增强,内力分布趋于均匀,使结构受力更为合理,但当墙肢长度增至一定程度后,这种有利的影响就不再明显,从三个试件的分析结果看,短肢墙肢厚比适中的试件抗震性能更好。更多还原

【Abstract】 There is still a shortage of theoretical studies on frame-supported short-leg shearwall structure, though it has been widely applied in present projects. Through quasi-static experiments on three inclined column-shaped frame-supported short-leg shearwall structure specimens with respectively the ratio of the width to the thickness of wall-leg ranged from 5, 6, to7 under the vertical load and horizontal cyclic load, this paper will make a comparative analysis on the results of inclined column-shaped frame-supported short-leg shearwall specimens with different ratios of the width to the thickness, and reach the conclusion that the ratio of the width to the thickness variations of wall-leg influences mechanical behavior of these specimens, the macro-phenomenon in the whole course of the experiment, and stress distribution of all the parts as well.The experiment and results of analysis revealed the stress mechanics, bearing capacity and damage shape of the transfer structure under vertical load, and its hysteretic characteristics, distortion ability, ductility factor, seismic energy dissipation and damage mechanism under horizontal load, and the seismic behavior of the inclined column-shaped transfer frame-supported short-leg shearwall structure under vertical and horizontal load. And provided some basis for reasonable design of this transfer structure in practical projects.The results of the experiment revealed that the inclined column-shaped transfer frame-supported short-leg shearwall structure has a good yield and damage mechanic, and the rationally designed frame-supported short-leg shearwall structure has a good seismic behavior. This sort of structure has a full hysteretic circle of the hysteretic loops, good ductility nature and dissipation ability, with a uniform distributed rigidity and a stable deformation nature for each layer in elastic and elastic-plastic deformation process. Along with the ratio of the thickness of wall-leg of the short-leg shearwall being enhanced, the rigidity of the structure is also noticeable enhanced, the endogen force becomes more evenly distributed and the bearing is more rational. However, when the wall-leg is stretched to a certain length, the favorable influence is no more obvious. The analysis of the three specimens shows that the short-leg shearwall with a moderate ratio of the thickness of wall-leg has the better seismic behavior.更多还原