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Structural Engineering and Mechanics
  Volume 58, Number 5, June10 2016, pages 905-929
DOI: http://dx.doi.org/10.12989/sem.2016.58.5.905
 


A modified replacement beam for analyzing building structures with damping systems
Hadi Moghadasi Faridani and Antonio Capsoni

 
Abstract
    This paper assesses efficiency of the continuum method as the idealized system of building structures. A modified Coupled Two-Beam (CTB) model equipped with classical and non-classical damping has been proposed and solved analytically. In this system, complementary (non-classical) damping models composed of bending and shear mechanisms have been defined. A spatial shear damping model which is non-homogeneously distributed has been adopted in the CTB formulation and used to equivalently model passive dampers, viscous and viscoelastic devices, embedded in building systems. The application of continuum-based models for the dynamic analysis of shear wall systems has been further discussed. A reference example has been numerically analyzed to evaluate the efficiency of the presented CTB, and the optimization problems of the shear damping have been finally ascertained using local and global performance indices. The results reveal the superior performance of non-classical damping models against the classical damping. They show that the critical position of the first modal rotation in the CTB is reliable as the optimum placement of the shear damping. The results also prove the good efficiency of such a continuum model, in addition to its simplicity, for the fast estimation of dynamic responses and damping optimization issues in building systems.
 
Key Words
    building structural systems; continuum model; replacement beam (RB); coupled two-beam (CTB); classical damping; non-classical damping; passive damping
 
Address
Hadi Moghadasi Faridani: Department of Civil and Environmental Engineering, Politecnico di Milano, 32 Leonadro da Vinci, Milan, 20133, Italy
Antonio Capsoni: Department of Architecture, Built Environment and Construction Engineering, Politecnico di Milano, 32 Leonadro da Vinci, Milan, 20133, Italy
 

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