Research on Connecting Method Between Hysteretic Damper and Reinforced Concrete Frame

近年来，柱式滞回阻尼器在高层钢筋混凝土（R/C）建筑中得到了应用。该柱原为h型钢，中间高度腹板采用低屈服强度钢。在R/C框架中，柱的上下两端通常采用端板和地脚螺栓与R/C梁连接，并由R/C底座包裹，以增加腹板的剪切变形。然而，煤柱与煤基之间的应力传递机制尚不清楚。R/C底座的非弹性特性研究还不够充分，这对阻尼器的性能有影响。此外，这种使用地脚螺栓的连接非常复杂，在建筑施工中不经济。本课题的研究目的是开发一种新的、更合理的柱式滞回阻尼器连接方法，阐明柱式滞回阻尼器的应力传递机理和循环特性。从这个研究项目中得到了以下结果：研制了一种新型连接方式，在R/C底座的h型钢法兰处仅采用螺栓剪切连接。在试验中，采用该连接方式的1/2比例尺柱型滞回阻尼器试件具有良好的阻尼性能。针对R/C基的受力特性，通过对试验数据的分析，建立了应力传递机理和荷载-变形关系模型。提出了R/C底座的设计方法。建立了柱型滞回阻尼器的荷载-变形关系模型。该模型考虑了R/C基础的非弹性弯曲和剪切变形，可用于柱式迟滞阻尼器建筑物的地震反应分析。

Recently, pillar type hysteretic dampers have been applied to high-rise reinforced concrete (R/C) buildings. This pillar is originally H-shaped steel and has low yield strength steel in the web at the middle height. In R/C frames, the both upper and lower ends of the pillar are usually connected to the R/C girders using end plates and anchor bolts, and also encased by R/C base to increase the shear deformation of the web. However, the stress transfer mechanism between the pillar and the R/C base has not been clarified. The inelastic behavior of the R/C base has not been sufficiently investigated, which has influence on the performance of the damper. Furthermore, this type of connection using anchor bolt is very complicated and not economical in building construction. The purpose of this research project is to develop a new and more rational connecting method of pillar type hysteretic dampers and to clarify the stress transfer mechanism and the cyclic behavior of the pillar type hysteretic damper.The following results are obtained from this research project.1. A new type connection, which has only stud shear connectors at the flange of H-shaped steel in the R/C base, was developed. In the experiments, 1/2 scale pillar type hysteretic damper specimens using this connection showed excellent performance as the damper.2. As for the behavior of the R/C base, models for the stress transfer mechanism and the load-deformation relationship were obtained from the analysis of the experimental data. The design method for the R/C base was developed.3. A model for the load-deformation relationship of the pillar type hysteretic dampers was proposed. The model is considering the inelastic flexural and shear deformations of the R/C bas, and can be used in earthquake response analysis of buildings with the pillar type hysteretic dampers.