论文部分内容阅读
开展了部分柱顶滑移钢筋混凝土框剪结构模型(模型B)与传统框剪结构模型(模型A)的地震模拟振动台对比试验,两模型均为三层两跨两开间,平面布置相同,几何相似比1∶10,第二层为结构薄弱层。此外,还进行了摩擦支座的力学性能试验,确定了支座摩擦系数的取值范围。研究发现:1)无润滑油时聚四氟乙烯+不锈钢镜面板摩擦支座的摩擦系数均值约0.070~0.095,有润滑油时该类摩擦支座的摩擦系数均值约0.014~0.018;2)不同峰值地震波作用下,模型B的薄弱层层间最大位移角、最大顶点相对位移、薄弱层最大绝对加速度和顶层最大绝对加速度分别比模型A降低20%~43%、17%~32%、12%~22%和7%~33%;3)模型B各层的最大层间剪力均不同程度小于模型A。因此,部分柱顶滑移钢筋混凝土框剪结构具有比传统框剪结构更优的抗震性能。
A comparison test was carried out between the seismic simulation shaking table of some of the columnar slipping reinforced concrete frame shear structure model (model B) and the traditional frame shear structure model (model A). The two models are all three- Geometric similarity of 1:10, the second layer of structural weakness. In addition, the mechanical properties of the friction bearing were also tested, and the range of bearing friction coefficient was determined. The results show that: 1) The average friction coefficient of polytetrafluoroethylene + stainless steel mirror plate friction bearing is about 0.070 ~ 0.095 when there is no lubricating oil, and the friction coefficient of friction bearings with lubricating oil is about 0.014 ~ 0.018; 2) Under the action of the peak seismic wave, the maximum displacement angle, the maximum relative displacement, the maximum absolute acceleration of the weak layer and the maximum absolute acceleration of the top layer in model B are respectively 20% -43%, 17% -32%, 12% ~ 22% and 7% ~ 33%, respectively. 3) The maximum interlaminar shear force in each layer of model B is less than that of model A in different degree. Therefore, some of the column-slipping reinforced concrete frame shear structures have better seismic performance than the traditional frame-shear structures.