论文部分内容阅读
以某钢筋混凝土框架结构工程实例为研究对象,选取与场地条件相匹配的地震动作为激励,在SAP2000程序中计算了该结构在多遇和罕遇地震作用下的非线性动力反应,并在框架结构模型中分别设置屈曲约束支撑和黏滞阻尼器。通过试算确定消能减震装置的参数,使得两种消能减震结构在多遇地震作用下的位移减震率均为40%。在此条件下,对比分析了结构的层间位移角、楼层加速度、基底剪力、柱轴力、塑性铰分布和各层阻尼器的工作状态。分析表明:在多遇地震作用下,屈曲约束支撑增大了结构的加速度响应,而黏滞阻尼器能够减小结构的加速度响应;在罕遇地震作用下,二者均能有效控制楼层的加速度响应,而屈曲约束支撑的位移减震效果更好,但黏滞阻尼器对框架柱内力的减少效果更为显著。
Taking an example of a reinforced concrete frame structure project as an example, the seismic response matching the site conditions was chosen as excitation. The nonlinear dynamic response of the structure under the action of frequent and rare earthquakes was calculated in SAP2000 program. The buckling restraint brace and the viscous damper are respectively set in the structural model. By trial calculation, the parameters of the energy-dissipating vibration-damping device are determined, so that the displacement and damping rates of the two energy-dissipating shock-absorbing structures under the action of frequent earthquakes are both 40%. Under these conditions, the layer displacement angle, floor acceleration, base shear, column axial force, plastic hinge distribution and working status of dampers at different layers were compared and analyzed. The analysis shows that the buckling restrained brace increases the acceleration response of the structure under the action of the earthquake, and the viscous damper can reduce the acceleration response of the structure. Both of them can effectively control the acceleration of the floor under the rare earthquake Response, and the buckling restraint support displacement displacement damping effect is better, but the viscous damper on the frame column to reduce the effect of force is more significant.