3D Seismic Isolator with Segmented Rubber Layers
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Solution Overview
Problem
Existing seismic isolators fail to provide effective vibration-seismic dual control, particularly in high-rise or high-volume buildings near transportation hubs, due to high vertical rigidity, limited vertical vibration isolation, and increased manufacturing costs, along with stability and deformation challenges.
Innovation Solution
A three-dimensional isolator design featuring a plurality of middle-layer connecting plates and rubber module units arranged in parallel, with pre-tightening pieces and damping arms, allowing for reduced vertical rigidity, enhanced damping, and improved stability, while using standardized module units for efficient manufacturing and deformation control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional seismic isolators use large first shape coefficient S1 and second shape coefficient S2 to ensure stability under vertical loads, then vertical rigidity is large and structural safety is improved, but vertical vibration isolation function is lost and low-frequency vibration isolation cannot be achieved
Solution Approach 1:
The isolator is divided into multiple rubber layers with different thicknesses, where the first rubber layer has increased thickness to reduce vertical rigidity and improve vibration isolation, while subsequent rubber layers maintain standard thickness to ensure structural stability. This segmentation allows different parts of the isolator to fulfill different functions simultaneously.
Solution Approach 2:
Different rubber layers are assigned different thicknesses to create local quality variations. The first rubber layer has larger thickness for vibration isolation, while other layers have standard thickness for stability. This local differentiation resolves the contradiction between overall stability and local vibration isolation performance.
2Object-affected harmful factors
If the thickness of the single rubber layer is increased to improve vertical vibration isolation performance, then free surface area of the rubber layer is increased and vibration isolation frequency is reduced, but the increase in thickness is limited to maintain isolator stability and structural safety
Solution Approach 1:
The total rubber thickness is segmented into multiple layers with different thicknesses. The first layer has increased thickness for vibration isolation, while subsequent layers have standard thickness. This allows the isolator to achieve improved vibration isolation without compromising overall stability, as the combined structure maintains adequate rigidity.
Solution Approach 2:
Instead of increasing thickness in one dimension, the solution adds multiple layers in the vertical dimension, creating a multi-layered structure. This dimensional approach allows the first layer to be thicker for vibration isolation while the cumulative effect of multiple layers maintains overall structural stability.
3Force
If traditional seismic isolators are used for high-rise or high-volume buildings near transportation hubs, then load-bearing capacity is required, but existing isolators cannot provide both seismic isolation and environmental vibration isolation functions
Solution Approach 1:
The isolator is segmented into multiple rubber layers with the first layer optimized for vibration isolation and subsequent layers for load-bearing and stability. This segmentation allows the isolator to simultaneously provide both vibration isolation and seismic protection functions, making it suitable for high-rise buildings near transportation hubs.
Solution Approach 2:
The multi-layer rubber isolator is designed to perform multiple functions: the first rubber layer provides vertical vibration isolation, while the combination of all layers provides load-bearing capacity and horizontal seismic isolation. This multi-functionality makes the isolator suitable for both seismic protection and environmental vibration isolation in high-rise buildings.
4Force
If large-sized isolators are used to meet load-bearing capacity requirements for high-rise buildings, then sizes and load-bearing capacity are increased, but manufacturing cost increases due to high-pressure tonnage, mold volume, and vulcanization period
Solution Approach 1:
The large isolator is segmented into multiple smaller rubber layers that can be manufactured separately using standard-sized molds and equipment. This segmentation allows each layer to be produced with conventional manufacturing capabilities, avoiding the need for expensive large-tonnage vulcanizing equipment while maintaining the required load-bearing capacity through the combined structure.
Solution Approach 2:
Instead of creating one large thick isolator that requires expensive manufacturing, the solution stacks multiple thinner layers in the vertical dimension. This dimensional approach achieves the required total thickness and load-bearing capacity while each individual layer can be manufactured with standard equipment, significantly reducing manufacturing costs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The three-dimensional isolator achieves efficient low-frequency vibration isolation, increased lateral buckling prevention, and cost-effective production, addressing the limitations of traditional seismic isolators by reducing vertical rigidity and improving stability and manufacturing precision.
Implementation Method 1
the mainstream way to improve the vertical vibration isolation performance of seismic isolators is to use thickly laminated (thick) rubber isolators
Implementation Method 2
the damping of the steel spring is much lower than that of the rubber material
Implementation Method 3
the pre-tightening piece being arranged between the flange plate and the upper cover plate in a penetrating mode so that the isolator body can be in a pre-pressing state
Implementation Method 4
a plurality of steel plates are arranged in the rubber pad at intervals up and down
Data Source
AI summary
A three-dimensional isolator for vibration-seismic dual control. The three-dimensional isolator comprises an isolator body and isolator components, wherein the isolator body comprises a plurality of middle-layer connecting plates and a plurality of rubber module units, the middle-layer connecting plates are vertically arranged at intervals, and the rubber module units are arranged on the upper surfaces and the lower surfaces of the middle-layer connecting plates in parallel and connect the middle-layer connecting plates into a whole; and the isolator components comprise cover plate components and pre-tightening pieces, the cover plate components comprise an upper cover plate, a lower cover plate and side walls which define an isolator cavity, a flange plate is arranged on the top of the side wall, a gap is reserved between the upper cover plate and the flange plate.


