Telescopic Earthquake-Proof Connecting Device for Structural Elements
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Solution Overview
Problem
Existing earthquake-proof connecting devices lack sufficient ductility to absorb seismic energy and mechanical strength to prevent detachment of structural elements during earthquakes, leading to potential collapse.
Innovation Solution
A telescopically coupled connecting device with adjustable inclined connecting plates and plastically deformable sliding limiting elements, allowing for relative movement between structural elements while maintaining secure fixation, thereby absorbing seismic energy and preventing excessive translation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If existing earthquake-proof connecting devices are used, then structural elements can be connected, but they lack sufficient ductility to absorb seismic energy and mechanical strength to prevent detachment
Solution Approach 1:
The connecting device is divided into two telescopic components that can slide relative to each other. This segmentation allows one component to remain fixed while the other moves during seismic events, providing both structural strength and the ductility needed to absorb seismic energy through controlled relative movement.
Solution Approach 2:
The device incorporates dynamic characteristics through its telescopic design, allowing it to adapt its configuration during earthquakes. The components can slide and adjust their positions based on seismic forces, transforming from a static rigid connection to a dynamic system that absorbs energy while maintaining structural integrity.
2Stability of the object's composition
If rigid connecting devices are used, then mechanical strength is maintained, but ductility to follow seismic movement is insufficient
Solution Approach 1:
The telescopic design enables the connection to transition from a rigid static state to a dynamic adaptive state during seismic events. The components can slide relative to each other, allowing the structure to adapt to ground movements while maintaining overall structural integrity through the constrained sliding mechanism.
Solution Approach 2:
The device changes its geometric parameters during operation - specifically the distance between connected structural elements can vary as components slide telescopically. This parameter change allows the connection to accommodate seismic displacements while maintaining structural stability through controlled movement within defined limits.
3Reliability
If ductile connecting devices are used, then seismic energy absorption is improved, but mechanical strength to prevent detachment is reduced
Solution Approach 1:
By segmenting the connection into two telescopic components, the device creates a system where ductility is achieved through relative movement between segments rather than through deformation of a single component. This maintains mechanical strength at the connection interfaces while providing the ductility needed for energy absorption.
Solution Approach 2:
The sliding mechanism acts as an intermediary between the two structural elements, allowing relative movement that absorbs seismic energy while maintaining the mechanical connection. This intermediary mechanism enables energy dissipation through friction and controlled sliding while preventing complete detachment through the telescopic constraint system.
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 provides sufficient ductility to follow seismic movements and mechanical strength to prevent detachment, ensuring structural integrity and avoiding damage to elements, while being adaptable for new constructions and post-earthquake repairs.
Implementation Method 1
said limiting elements being plastically deformable
Data Source
Figure 1~3
Figure 4~5
Figure 6~7
AI summary
An earthquake-proof connecting device (1; 40; 70; 100) for connecting a first structural element (9, 19; 44a, 44b; 74, 75) to a second structural element (19, 9; 44b, 44a; 75, 74) is provided with a first fixing element (2; 42; 72; 102) which is configured to be fixed to the first structural element (9, 19; 44a, 44b; 74, 75) and is provided with a guide (14; 47; 85; 114) for housing slidably a second fixing element (3; 43; 73; 103) configured to be fixed to the second structural element (19, 9; 44b, 44a; 75, 74).