Mechanical model and structural control performance of a new rotation-magnified viscoelastic damper

2021 ◽  
pp. 113569
Author(s):  
Hong-Nan Li ◽  
Xing Fu ◽  
Yuan-Long Li ◽  
Hui-Juan Liu
PLoS ONE ◽  
2017 ◽  
Vol 12 (6) ◽  
pp. e0176480 ◽  
Author(s):  
M. H. Mehrabi ◽  
Meldi Suhatril ◽  
Zainah Ibrahim ◽  
S. S. Ghodsi ◽  
Hamed Khatibi

2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Shujin Li ◽  
Lei Sun ◽  
Fan Kong

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.


2020 ◽  
Vol 29 (4) ◽  
pp. 045041 ◽  
Author(s):  
Ning Ma ◽  
Yiwen Yao ◽  
Qi Wang ◽  
Chenguang Niu ◽  
Xufeng Dong

Author(s):  
M. Sarikaya ◽  
J. T. Staley ◽  
I. A. Aksay

Biomimetics is an area of research in which the analysis of structures and functions of natural materials provide a source of inspiration for design and processing concepts for novel synthetic materials. Through biomimetics, it may be possible to establish structural control on a continuous length scale, resulting in superior structures able to withstand the requirements placed upon advanced materials. It is well recognized that biological systems efficiently produce complex and hierarchical structures on the molecular, micrometer, and macro scales with unique properties, and with greater structural control than is possible with synthetic materials. The dynamism of these systems allows the collection and transport of constituents; the nucleation, configuration, and growth of new structures by self-assembly; and the repair and replacement of old and damaged components. These materials include all-organic components such as spider webs and insect cuticles (Fig. 1); inorganic-organic composites, such as seashells (Fig. 2) and bones; all-ceramic composites, such as sea urchin teeth, spines, and other skeletal units (Fig. 3); and inorganic ultrafine magnetic and semiconducting particles produced by bacteria and algae, respectively (Fig. 4).


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