Abstract:
In this paper, we propose a horizontal omnidirectional isolation system (HOSIS) which has a higher isolation capacity and vertical tensile capacity than the laminated rubber isolator currently in use for seismic isolation. The design consists of a horizontal omnidirectional isolator, which allow for the isolation of horizontal seismic waves by realizing free rolling and slip, jointly applied with a vertical tensile isolator, which support load. We begin by presenting five designs of the horizontal omnidirectional isolator: HOSIS-I, HOSIS-M, HOSIS-C, HOSIS-S, HOSIS-AVSD. HOSIS-I, M, and C differ in the placement of rolling balls, allowing for different capacities of shock isolation; HOSIS-S is a simplified design aimed for rural application with marked reduc-tions in volume and cost, and HOSIS-AVSD inserts an anti-stretch device to prevent pull during times without seismic response. Each variation is complemented by a mechanical model, material optimizations, and a design scheme with consideration to physical parameters. The design for the vertical tension device is detailed in the subsequent sections, and the joint application of the two components in engineering practice is brought
forward for future experimentation. The five variations which allow for varying degrees in isolation capacity make the system suitable to be applied to buildings of all dimensions. Its characteristics of low-cost, easy construction and maintenance, and long service life allow for ready popularization in infrastructure in both urban and rural environments. Finally, this paper concludes that HOSIS offers significant advantages over the
classical methods of seismic isolation and suggests the development of this technology as a fruitful direction for future research.
