Variable Friction Seismic Damping Partition Wall
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Solution Overview
Problem
Existing seismic-damping partition wall technologies face challenges such as weak seismic-damping ability, difficult damage control, poor bidirectional cooperation, and limited adaptability to existing construction methods, particularly in reducing seismic action and enhancing resilience in buildings during earthquakes.
Innovation Solution
A variable friction energy dissipation prefabricated seismic-damping partition wall-frame structure with decoupling and variable friction mechanisms, incorporating rubber pads, friction seismic-damping layers, and steel angle restraining members, allowing for improved energy dissipation and damage control under both minor and strong seismic conditions, while being adaptable to existing construction processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the partition wall is reinforced with reinforcing bars or studs to prevent severe damage, then the damage control ability is improved, but the lateral stiffness of the structure increases significantly, causing strong column and weak beam design philosophy to be violated
Solution Approach 1:
The patent extracts the seismic-damping function from the partition wall body by introducing a separate friction energy dissipation device. The partition wall is decoupled from the frame structure, and only the friction device remains to provide energy dissipation, while the partition wall itself is simplified to a lightweight non-structural element that does not increase lateral stiffness
Solution Approach 2:
The friction energy dissipation device acts as an intermediary between the partition wall and the frame structure. It provides the necessary energy dissipation function while allowing the partition wall to be lightly connected to the frame, thus avoiding the transmission of large lateral forces to the structural members
2Reliability
If sliding friction energy dissipation is implemented by paving a friction layer to improve the friction coefficient, then the seismic-damping function is enhanced, but the energy dissipation capacity remains limited with flatly rectangular hysteretic curves
Solution Approach 1:
The patent changes the friction coefficient parameter dynamically by using a friction material with variable friction characteristics. The friction coefficient increases with the normal force, creating a nonlinear frictional force that generates full-closed hysteretic curves with significantly enhanced energy dissipation capacity compared to constant friction coefficient systems
Solution Approach 2:
The friction energy dissipation device uses a composite structure combining a friction material layer with specific mechanical properties. The friction material is designed to exhibit variable friction coefficient characteristics, creating a composite system that achieves both lightweight construction and high energy dissipation capacity
3Reliability
If multiple preset sliding joints are arranged in the partition wall to implement damage control, then the decoupling between partition wall and frame is achieved, but the post-earthquake repair time and cost increase due to sliding through cracks
Solution Approach 1:
The patent extracts the energy dissipation function from the partition wall body and places it in a separate friction device. This eliminates the need for sliding joints within the partition wall panels themselves, as the friction device is installed at the boundary between the partition wall and the frame structure
Solution Approach 2:
The system is segmented into the partition wall panels and the friction energy dissipation device as separate components. The friction device is installed independently at the connection interface, allowing the partition wall panels to remain intact without requiring sliding joints within their 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 solution enhances the seismic-damping ability, reduces structural damage, and improves resilience by providing increased damping ratios and reducing the likelihood of out-plane collapse, while being suitable for various building types and existing structures.
Implementation Method 1
Sliding friction energy dissipation between the partition walls is the major method to implement the seismic-damping function of the partition wall
Implementation Method 2
a rubber pad is installed at the notch
Data Source
AI summary
The present invention relates to a variable friction energy dissipation prefabricated seismic-damping partition wall-frame structure and a construction method therefor. The variable friction energy dissipation prefabricated seismic-damping partition wall-frame structure includes a peripheral frame, prefabricated seismic-damping partition wall panels, rubber pads, a friction seismic-damping layer, horizontal force transfer members and a steel angle restraining members. The sliding friction of the partition wall can be significantly improved with increase of an inter-story drift, so that the partition wall has a larger hysteretic area and a higher energy dissipation capacity and can provide the structure with a relatively high additional damping ratio, so as to alleviate a seismic action. In addition, integral damage control of the partition wall can be better achieved, and the energy dissipation capacity of the partition wall under bidirectional seismic actions can be guaranteed.