Vibration Control Performance Analysis and Shake-Table Test of a Pounding Tuned Rotary Mass Damper under the Earthquake

Abstract

The voided biaxial concrete slab has been widely used in the engineering field. The slab has become a popular choice for designers and architects looking to reduce slab thickness and overall structure weight recently. Utilizing the empty space in the voided slab and introducing the structural control technology of mass damper into it, a new pounding tuned rotary mass damper (PTRMD) is proposed in this paper. This damper is designed to locate in the prefabricated hollow module to mitigate response of structure subject to disastrous excitations. The damper combines the characteristics of pounding mechanisms (PMDs) and tuned rotary mass dampers (TRMDs). This is achieved by a ball rolling on a curved orbit and a fixed stroke-limiting plate. The structural control performance of the PTRMD is studied numerically and verified experimentally. Specifically, first, the motion equations for a single-degree-of-freedom (SDOF) and multiple-degree-of-freedom (MDOF) system with PTRMDs are derived. Furthermore, numerical results show that the PTRMD provides significant energy dissipation, and thus, is quite effective in reducing the structure response. Besides, the PTRMD generally exhibits better control performance and robustness in terms of vibration suppression compared with the TRMD proposed by the authors before. Finally, a shake-table test is conducted to verify the damping effect of a PTRMD-controlled SDOF system. Pertinent results confirm the effectiveness and robustness of PTRMDs for structural control.

Seismic Model Parameter Optimization for Building Structures

“…The Quanser Shake Table II (STII) is a shake table device for training, which had originally been developed by the University Consortium on Instructional Shake Tables (UCIST). It can be used for educational [70] and research purposes in various topics such as mechanical, aerospace [71] and civil engineering structural dynamics [72], vibration isolation [73], and feedback control [74].…”

Performance enhancement of a viscoelastic bistable energy harvester using time-delayed feedback control

“…Viscoelastic material has been applied in physics, medicine, engineering, mathematics, and other fields because of its unique characteristics of stress relaxation, creep, energy storage, and dissipation. [33][34][35][36] Oumbé Tékam et al [37] focused on the dynamics of fractional viscoelastic materials applied to a strong nonlinear energy harvesting system, and analyzed the complexity of system response by controlling viscoelastic parameters. According to research by Huang et al, [38] the relationship between the parameters of the tristable viscoelastic vibration isolation system under random excitation and the dynamic characteristics of system under the time-delayed feedback control was established.…”

Time Domain Damage Identification Approach of the Newly Hollow Floor Structure with TRMD

“…Then, Obata and Shimazaki [8] proposed a new tuned rotary mass damper that consists of a container (outer shell) and a cylinder-type weight (rotary mass) as a passive-type vibration control system and conducted a field experiment on a lamppost for a highway bridge [9]. The tuned rolling mass damper (TRMD) proposed by Li et al [10,11] in this paper consists of a ball rolling along an arch path located in hollow modules to absorb the structural kinetic and potential energy when subjected to ambient excitations. Furthermore, compared with the traditional vibration control system-the tuned mass damper (TMD) as an additional energy absorbing device [12]-the most significant advantage of the installation of the 2 of 12 TRMD in hollow modules embedded in slabs lies in its capacity to maintain architectural integrity.…”

“…Furthermore, compared with the traditional vibration control system-the tuned mass damper (TMD) as an additional energy absorbing device [12]-the most significant advantage of the installation of the 2 of 12 TRMD in hollow modules embedded in slabs lies in its capacity to maintain architectural integrity. Li and his research team [10,11] carried out theoretical and experimental research into the hollow floor structure with TRMD. The advantage of the newly combined TRMD and the hollow floor structural system, as shown in Figure 1, is that the damping device TRMD not only suppresses structural responses but also effectively solves the conflict between the setting of the control device and the function of the building, which does not occupy the use space of the building or affects the use function of the structure.…”