Techno Press

Steel and Composite Structures   Volume 28, Number 6, September25 2018, pages 691-708
Direct displacement based design of hybrid passive resistive truss girder frames
Amir Hamzeh Shaghaghian, Morteza Raissi Dehkordi and Mahdi Eghbali

Abstract     [Full Text]
    An innovative Hybrid Passive Resistive configuration for Truss Girder Frames (HPR-TGFs) is introduced in the present study. The proposed system is principally consisting of Fluid Viscous Dampers (FVDs) and Buckling Restrained Braces (BRBs) as its seismic resistive components. Concurrent utilization of these devices will develop an efficient energy dissipating mechanism which is able to mitigate lateral displacements as well as the base shear, simultaneously. However, under certain circumstances which the presence of FVDs might not be essential, the proposed configuration has the potential to incorporate double BRBs in order to achieve the redundancy of alternative load bearing paths. This study is extending the modern Direct Displacement Based Design (DDBD) procedure as the design methodology for HPR-TGF systems. Based on a series of nonlinear time history analysis, it is demonstrated that the design outcomes are almost identical to the pre-assumed design criteria. This implies that the ultimate characteristics of HPR-TGFs such as lateral stiffness and inter-story drifts are well-proportioned through the proposed design procedure.
Key Words
    truss girder frames; hybrid passive resistance; direct displacement based design; energy dissipating devices; V-shaped link; bolted hinges
(1) Amir Hamzeh Shaghaghian, Morteza Raissi Dehkordi:
School of Civil Engineering, Iran University of Science and Technology (IUST), Tehran, Iran;
(2) Mahdi Eghbali:
Department of Civil Engineering, Faculty of Engineering, University of Zanjan, Zanjan, Iran.

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