基于能量的不同类型耗能支撑对钢框架抗震性能的影响  

Energy-based study on seismic performance of steel frame with different types of energy dissipating braces

作　　者：杨家琦 杨超 郁银泉 

机构地区：[1]碧桂园集团,广东佛山528311 [2]中国建筑标准设计研究院有限公司,北京100048

出　　处：《建筑结构学报》2016年第7期105-113,共9页Journal of Building Structures

摘　　要：为对比分析金属屈服型、黏滞阻尼型及摩擦型这三种不同的耗能支撑的减震效果,运用ABAQUS软件进行有限元建模,较为准确地模拟了三种支撑以及钢材的滞回行为。以一个10层钢框架结构为例,在层间位移角为1/50时支撑单周耗能相等的前提下,对设有这三种类型的耗能支撑的钢框架在罕遇地震作用下的减震效果进行了对比,得到了钢框架结构和耗能支撑在罕遇地震作用下的变形及损伤耗能规律。用逐步增量动力分析法,对结构进行了结构易损性分析。结果表明:耗能支撑的运用,可以不同程度地减小钢框架结构在地震作用下的变形和损伤,实现结构更高的抗震性能目标。综合分析研究结果表明,屈曲约束支撑和摩擦型支撑减震效果相近,黏滞阻尼支撑减震效果最好。In order to compare and analyse the energy dissipation effect of three different types of dampers, i.e. metal yielding-, viscous-, and frictional-dampers, finite element models were built with the software ABAQUS in which the hysteresis behaviors of these three types of dampers and steel material were modelled. A 10-story steel frame is analysed as an example. The behaviors of dampers are normalised as equal energy dissipation under the inter-story drift ratio of 1/50. The performance of dampers under rare earthquakes is analysed. The results present the deformation, energy dissipation as well as structural damage distribution. Then, the incremental dynamic analysis （IDA） was carried out and the fragility of the structure is evaluated. The results indicate that with the use of dampers, the seismic performance of steel frames can be improved significantly and the damage of steel frame can be reduced, which leads to higher level of structural seismic performance. Among the three types of dampers presented, metal yielding damper and frictional damper have similar performance, while the viscous damping brace is the most efficient in reducing the seismic response of structures.

关 键 词：钢框架 屈曲约束支撑 黏滞阻尼支撑 摩擦型支撑 IDA 易损性 消能减震 

分 类 号：TU392[建筑科学—结构工程] TU352.1