Viscoelastic Connecting Device for Prefabricated Wall Vibration and Thermal Control
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Solution Overview
Problem
Prefabricated assembled walls have weak connection stiffness and poor thermal insulation and vibration resistance due to large joint seams, leading to potential cold and hot bridges and structural instability under vibration.
Innovation Solution
An energy-consuming connecting device with a symmetrical structure comprising a wrapping steel plate, viscoelastic material, grooved steel plate, fixing plates, spring, and H-shaped steel column, which allows for relative displacement and energy dissipation under vibration, reducing horizontal and vertical displacement and enhancing thermal insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional welding connection is used for prefabricated assembled walls, then construction speed is improved, but connection stiffness and structural integrity deteriorate
Solution Approach 1:
The connection method is changed from rigid welding to flexible viscoelastic material bonding, altering the mechanical parameters of the joint to achieve both speed and stiffness requirements
Solution Approach 2:
The connecting device uses composite structure combining steel plates with viscoelastic material to achieve both structural strength and energy dissipation capabilities
2Device complexity
If simple seam filling is used for wall joints, then construction complexity is reduced, but thermal insulation performance deteriorates due to cold and hot bridges
Solution Approach 1:
The connecting device uses composite structure combining steel plates with viscoelastic material to achieve both structural strength and thermal insulation performance by breaking the cold bridge path
Solution Approach 2:
The viscoelastic material is specifically placed at the joint seam location where thermal insulation is most needed, providing localized thermal break without affecting overall structural integrity
3Strength
If rigid connection is used for prefabricated walls, then structural strength is improved, but vibration resistance and energy dissipation capacity deteriorate
Solution Approach 1:
The connection flexibility is adjusted by selecting appropriate viscoelastic material properties, allowing the joint to deform under vibration while maintaining structural strength
Solution Approach 2:
The viscoelastic material converts harmful vibration energy into heat through internal friction, dissipating energy and reducing the impact of vibrations on the structure
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 improves the structural integrity and thermal insulation of prefabricated walls by dissipating vibration energy, reducing displacement, and preventing cold and hot bridges, while allowing for efficient construction and maintenance.
Implementation Method 1
The viscoelastic material 2 is bonded to the inner wall of the wrapping steel plate 1 and the inner wall of the second fixing plate 5
Implementation Method 2
the viscoelastic material dissipates part of vibration kinetic energy
Implementation Method 3
a spring 6, a plate-shaped dowel 7 and an H-shaped steel column 8
Implementation Method 4
the plate-shaped dowel 7 is connected with the spring 6 and the spring 6 is fixed with the H-shaped steel column 8
Data Source
AI summary
The present invention belongs to the technical field of energy consumption and vibration reduction of assembled building structures, and provides an energy-consuming connecting device for a prefabricated assembled wall. The present invention provides a normal connection function between walls, and also has the functions of energy consumption and vibration reduction. A used viscoelastic material can provide energy consumption and weaken the cold and hot bridge effect, which is beneficial to building thermal insulation. Meanwhile, the energy-consuming connecting device for the prefabricated assembled wall can be connected with a prefabricated wall in advance, which can be carried out at the same time as the wall is inserted during construction, thereby effectively increasing the construction efficiency. Through the design of clamping groove devices, the wall can be connected firmly and reliably while generating displacement and consuming energy. A multi-segment fixing plate is used to replace full-length arrangement to save the steel.