【作者】 杨亚彬；

【导师】 曹万林；

【作者基本信息】 北京工业大学 ， 土木工程， 2011， 博士

【摘要】 剪力墙是用于高层建筑抗侧力体系的关键竖向构件。随着高层建筑特别是超高层建筑的快速发展,研发新型组合剪力墙已成为工程亟需。在课题组已有方钢管混凝土边框组合剪力墙抗震研究基础上,本文提出了圆钢管混凝土边框内藏钢桁架组合剪力墙,这是一种多重组合剪力墙,实现了钢管混凝土、混凝土剪力墙、钢桁架三种抗侧力体系组合,以及型钢和混凝土两种材料组合,充分发挥了不同抗侧力体系和不同材料的抗震优势,形成了具有多道抗震防线的组合剪力墙。本文对该多重组合剪力墙进行了较系统的抗震性能试验研究和理论分析,主要贡献如下:1.提出了圆钢管混凝土边框内藏钢桁架组合剪力墙,完成了11个1/5缩尺的剪跨比分别为1.0、1.5和2.0模型试件的低周反复荷载试验研究,较系统地分析了各试件的承载力、延性、刚度及其退化过程、滞回特性、耗能能力及破坏特征等,揭示了其抗震机理。2.完成了6个1/12缩尺的高宽比分别为1.5和3.0模型试件的模拟地震振动台试验研究,较系统地分析了在不同台面峰值加速度输入工况下,各试件的加速度反应、位移反应和应变反应等,得出了不同构造剪力墙在地震作用下的累积损伤演化过程。3.建立了圆钢管混凝土边框内藏钢桁架组合剪力墙的承载力计算模型、恢复力模型,并实现了弹塑性有限元建模,计算结果与实测结果符合较好。基于理论计算分析,揭示了该新型组合剪力墙的受力与变形变化规律。4.给出了圆钢管混凝土边框内藏钢桁架组合剪力墙抗震设计方法。包括适用范围、一般规定、布置原则和构造措施。主要结论:(1)圆钢管混凝土边框内藏钢桁架组合剪力墙,具有多道抗震防线和良好的抗震屈服机制,其承载力、延性比圆钢管混凝土边框剪力墙明显提高,比普通混凝土剪力墙显著提高。(2)圆钢管混凝土边框内藏钢桁架组合剪力墙,由于其剪力墙中内藏钢桁架的存在,有效制约了剪力墙斜裂缝的出现和发展,提高了剪力墙的后期刚度。(3)圆钢管混凝土边框内藏钢桁架组合剪力墙,具有良好的滞回性能和较强的抗震耗能能力。(4)圆钢管混凝土边框内藏钢桁架组合剪力墙,在动力荷载作用下位移反应明显小,具有较强的抗地震倒塌能力。更多还原

【Abstract】 Shear wall is the main component that resists the lateral force for high-rise buildings. With the rapid development of high-rise buildings, especially the super high-rise buildings, research on new composite shear wall has become urgently needed for engineering. Based on previous study of our group about shear wall with concrete filled square steel tube columns, the shear wall with concrete filled round steel tube columns and concealed steel trusses has been brought forward in this paper. This new shear wall is a kind of multiple composite shear wall. It make the combination of the three lateral force resisting systems which are steel tube, concrete shear wall and steel truss, and the combination of two materials which are steel and concrete possible. And it also reflects the advantages of different lateral force resisting systems and different materials fully, and formed multi-channel seismic line. Seismic experimental research and theoretical analysis have been presented in this paper. Main contributions are listed as follows:1. Composite shear wall with concrete filled round steel tube columns and concealed steel trusses was proposed. The experimental study on the seismic behavior of eleven 1/5 scaled shear wall specimens with different shear span ratios (1.0, 1.5, 2.0) has been done under the cyclic loading action. The load-carrying capacity, ductility, stiffness and its attenuation process, hysteretic behavior, energy dissipation and failure phenomena of each specimen were discussed systematically. And their seismic mechanism was revealed.2. Six 1/12 scaled shear wall specimens with different aspect ratios (1.5, 3.0) have been tested on the shaking table. The acceleration response, displacement response, strain responses of each specimen are discussed systematically. And the damage evolution process of different constructional shear walls under earthquake was summarized.3. The simplified mechanics model of load-carrying capacity and restoring force model of shear wall with concrete filled round steel tube columns and concealed steel trusses have been established. The finite element analysis theoretical models have also been developed. The calculated results are in good agreement with those from experiments. Based on the theoretical analysis of shear wall with concrete filled round steel tube columns and concealed steel trusses, the variation mechanism of force to deformation was revealed.4. The seismic design method of Shear wall with concrete filled round steel tube columns and concealed steel trusses have been presented, which include applied scope, general rules, the layout principles and construction measures. Main considerations are concluded as follows:(1) Shear wall with concrete filled round steel tube columns and concealed steel trusses have multi-channel seismic lines and good seismic yielding mechanism. The load-carrying capacity, ductility are obviously increased compare to normal shear wall.(2) The steel trusses embedded in the shear wall with concrete filled round steel tube columns and concealed steel trusses effectively control the emergence and development of inclined cracks in the wall, and accordingly increase the later stiffness of the wall.(3) Shear wall with concrete filled round steel tube columns and concealed steel trusses has good hysteretic performance and high seismic energy dissipation capacity.(4) The displacement responses of shear wall with concrete filled round steel tube columns and concealed steel trusses is smaller under dynamic load, the shear wall exhibits the strong ability of anti-seismic collapse.更多还原