摩擦耗能框架体系动力分析  

Dynamic analysis of frame structures with friction energy dissipation devices

作　　者：周强[1] 吕西林[1] 

机构地区：[1]同济大学结构工程与防灾研究所,上海200092

出　　处：《地震工程与工程振动》2001年第2期136-144,共9页Earthquake Engineering and Engineering Dynamics

基　　金：国家杰出青年科学基金项目(50025821)

摘　　要：采用粘性屈服模型来模拟摩擦耗能器的力－速度关系，建立了带有摩擦耗能器体系的动力分析方法，采用增量型Ｒｏｓｅｎｂｒｏｃｋ二级三阶半隐式 Ｒｕｎｇｅ—Ｋｕｔｔａ法求解动力方程；得到了带有摩擦耗能器单层框架在正弦波激励下反应的解析解，并据此验证粘性屈服模型及求解动力方程算法的正确性；分析了摩擦耗能器的起滑力和支撑刚度对耗能减振效果的影响。It is very inconvenient when the discontinuous Coulomb friction model is used to simulate the friction force-velocity relationship in numerical analysis, so the continuous viscous yield model is used to solve the problem. Then the dynamic analysis method of energy dissipation system with the friction damper(FDs) is established, and an increment type Rosenbrock send-implicit Runge-Kutta method of order 3 with stage numebr 2 is adopted to solve the dynamic equations. Exact solution of a single-story braced frame with FDs under the sine wave excitation is obtained to verify the viscous yield model and the solution algorithm. The effects of some parameters. which are initial slip force of FDs and bracing stiffness, are also studied.

关 键 词：摩擦耗能器 粘性屈服模型 半隐式Runge-Kutta法 动力分析 抗震结构 

分 类 号：TU352.11[建筑科学—结构工程]