Substructure Shake Table Testing of Frame Structure–Damper System Using Model-Based Integration Algorithms and Finite Element Method: Numerical Study

Bo Fu,Huanjun Jiang,Jin Chen

doi:10.3390/sym13091739

Abstract

Substructure shake table testing (SSTT) is an advanced experimental technique that is suitable for investigating the vibration control of secondary structure-type dampers such as tuned mass dampers (TMDs). The primary structure and damper are considered as analytical and experimental substructures, respectively. The analytical substructures of existing SSTTs have mostly been simplified as SDOF structures or shear-type structures, which is not realistic. A common trend is to simulate the analytical substructure via the finite element (FE) method. In this study, the control effects of four dampers, i.e., TMD, tuned liquid damper (TLD), particle damper (PD) and particle-tuned mass damper (PTMD), on a frame were examined by conducting virtual SSTTs. The frame was modeled through stiffness-based beam-column elements with fiber sections and was solved by a family of model-based integration algorithms. The influences of the auxiliary mass ratio, integration parameters, time step, and time delay on SSTT were investigated. The results indicate that the TLD had the best performance. In addition, SSTT using model-based integration algorithms can provide satisfactory results, even when the time step is relatively large. The effects of integration parameters and time delay are not significant.

Highlights

Substructure shake table testing (SSTT) is one of the most advanced experimental techniques in structural and earthquake engineering [1]
Kang et al [6] conducted a series of 1:30 scaled model shake table tests and numerical simulations for a coal-fired power plant equipped with a large mass ratio multiple-tuned mass damper (LMTMD), and found that the LMTMD
We numerically investigate the seismic response reduction effects of four types of dampers, i.e., tuned mass dampers (TMDs), tuned liquid damper (TLD), particle damper (PD), and particletuned mass damper (PTMD), on a four-story steel frame by conducting a series of virtual SSTTs

Summary

Introduction

Substructure shake table testing (SSTT) is one of the most advanced experimental techniques in structural and earthquake engineering [1]. The best use of SSTT is for investigating the vibration control effects of dampers, such as the classical TMDs and TLDs, and emerging dampers, such as particle dampers (PDs) [2] and particle-tuned mass dampers (PTMDs) [3] These dampers can be regarded as secondary structures with respect to the primary structure. Kang et al [6] conducted a series of 1:30 scaled model shake table tests and numerical simulations for a coal-fired power plant equipped with a large mass ratio multiple-tuned mass damper (LMTMD), and found that the LMTMD is effective and robust in reducing structural dynamic responses. Wang et al [7] evaluated the performance of a pendulum pounding-tuned mass damper (PPTMD) by carrying out a series of shake table tests They reported that the inherent damping of the primary structure decreases the control efficiency of the PPTMD. Lu et al [3]

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