Energy Dissipation Device with Nested Core Modules
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Solution Overview
Problem
Conventional energy dissipation devices in buildings are inadequate in dissipating kinetic energy during earthquakes, leading to potential plastic deformation and residual stress, rendering buildings unsafe.
Innovation Solution
A two-core energy dissipation device comprising a primary core module, a secondary core module, a housing module, preload tension members, and a resilient compression unit, which generates a retarding force to dissipate kinetic energy through relative movements between these components under external forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional energy dissipation device is used, then the device structure is simple, but the kinetic energy dissipation capability is insufficient
Solution Approach 1:
The energy dissipation device is divided into multiple independent core modules (first core module, second core module, third core module, fourth core module) that can function separately. Each core module contains energy dissipation components that operate independently, allowing the system to dissipate kinetic energy through multiple parallel mechanisms rather than relying on a single complex system.
Solution Approach 2:
The core modules are nested within a housing structure, with each core module containing internal components (energy dissipation components, resilient compression units, preload tension members) nested within nhau. This nested arrangement allows multiple functional elements to be integrated in a compact configuration, increasing energy dissipation capability without proportionally increasing overall device volume.
2Loss of energy
If the energy dissipation device allows large displacement, then the kinetic energy dissipation capability is improved, but the building may experience excessive movement
Solution Approach 1:
The device incorporates adjustable stiffness parameters through the configuration of resilient compression units and preload tension members. By adjusting the stiffness of these components, the device can control the displacement characteristics during energy dissipation, allowing large displacements for energy absorption while maintaining sufficient stiffness to limit excessive building movement through the retarding force mechanism.
Solution Approach 2:
The energy dissipation device generates retarding forces that act as a feedback mechanism to oppose the relative movement between core modules and housing. This retarding force automatically increases with displacement velocity, providing a stabilizing effect that dissipates kinetic energy while preventing uncontrolled excessive movement, thus maintaining building stability during seismic events.
3Loss of energy
If the energy dissipation device generates large retarding force, then the kinetic energy dissipation capability is improved, but the device may cause damage to the building structure
Solution Approach 1:
The retarding force generated by the device is dynamic rather than static, varying with the relative velocity between core modules and housing. The retarding force increases with movement velocity during seismic events, providing maximum energy dissipation when needed most, while automatically reducing to minimal levels during normal conditions, thus preventing damage to building structure while maintaining high energy dissipation capability during earthquakes.
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 device effectively dissipates kinetic energy generated during earthquakes, reducing the risk of plastic deformation and residual stress in buildings by allowing large displacement and adjustable stiffness, thereby enhancing safety.
Implementation Method 1
the resilient compression unit is compressed, such that relative movement between the primary core module and the housing module and relative movement between the housing module and the first outer plate or between the housing module and the second outer plate are generated
Implementation Method 2
The energy dissipation unit dissipates kinetic energy generated by a relative movement between the primary core module and the housing module, a relative movement between the housing module and the first outer plate or a relative movement between the housing module and the second outer plate
Implementation Method 3
the first preload tension member and the second preload tension member are stretched by the external force
Data Source
AI summary
An energy dissipation device includes a primary core module, a housing module, first and second outer plates, an energy dissipation unit, first and second preload tension members and a resilient compression unit. When the primary core module and the housing module are subjected to an external force, the first and second preload tension members stretched by the external force, and the resilient compression unit is compressed, such that relative movement between the primary core module and the housing module is generated. The energy dissipation unit generates a retarding force during the relative movement between the primary core module and the housing module, so as to dissipate the kinetic energy generated as a result of the external force.