Method for design of seismic-damping partition wall with variable friction energy dissipation
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Solution Overview
Problem
Existing seismic-damping partition walls in building structures face challenges such as significant damage during earthquakes due to their interaction with the main structure, leading to increased lateral stiffness and seismic effects, which complicates post-earthquake repair and are not effectively designed to provide additional damping for the structure.
Innovation Solution
A method for designing a seismic-damping partition wall with variable-friction energy dissipation by arranging a seismic-damping layer at the bottom, incorporating a flexible connection to reduce structural interaction and introducing energy dissipation through inter-story deformation, with a parameterized design approach to enhance damping and resilience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the partition wall is considered as a self-bearing non-structural member, then the design and construction is simplified, but the partition wall greatly improves the lateral resisting stiffness of the structure, shortening the natural vibration period and increasing the seismic effect borne by the structure, causing serious damage to the partition wall itself
Solution Approach 1:
The partition wall is segmented into multiple independent units connected by flexible connections, allowing each segment to move independently during seismic events. This reduces the overall lateral stiffness while maintaining the partition wall's functional integrity and reducing seismic damage to individual components.
Solution Approach 2:
The patent introduces variable friction energy dissipation parameters that change with seismic intensity. The friction coefficient is adjusted dynamically based on the magnitude of seismic forces, allowing the partition wall to provide appropriate resistance under different earthquake conditions without overly stiffening the structure.
2Loss of energy
If a seismic-damping layer is arranged at the bottom of the partition wall with variable-friction sliding energy dissipation, then the sliding displacement is maximally improved and energy dissipation capacity is increased, but the partition wall will slide and deform under earthquake action, causing sliding through crack on the wall surface
Solution Approach 1:
A sliding control mechanism acts as an intermediary between the seismic-damping layer and the partition wall body. This mechanism allows controlled sliding at the damping layer while preventing uncontrolled cracking of the wall surface, mediating between energy dissipation requirements and structural integrity.
Solution Approach 2:
The patent employs composite construction methods combining the partition wall material with reinforcement elements that accommodate sliding deformation. This composite approach allows the wall to undergo controlled sliding at the damping layer while maintaining surface integrity through the reinforcing composite structure.
3Productivity
If the partition wall undergoes variable-friction sliding energy dissipation driven by the top, then the sliding displacement is maximally improved under the same inter-story displacement, but the sliding crack can be well controlled below the floor, requiring repair only at the bottom
Solution Approach 1:
The sliding and energy dissipation function is extracted from the main partition wall body and concentrated at the bottom seismic-damping layer. This extraction allows the majority of the wall to remain intact while all sliding deformation and associated cracking are confined to the dedicated damping zone at the bottom, simplifying post-earthquake repair to a localized area.
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 method improves the seismic resilience of both the partition wall and the structure by providing higher damping forces and greater sliding displacement, enabling rule-based design and synergistic enhancement of structural damping capabilities.
Implementation Method 1
the partition wall undergoes variable-friction sliding energy dissipation driven by the top
Data Source
AI summary
The method for design of a seismic-damping partition wall with variable-friction-force energy dissipation provided by the present application includes the following steps: building a bare frame model without considering lateral resisting stiffness of a partition wall, and calculating an inter-story shear force and an inter-story displacement of a structure under action of an earthquake; calculating an elastic strain energy of the structure, and determining an expected additional damping ratio provided by a seismic-damping partition wall for the structure; determining a friction damping force-sliding displacement curve of a single group of seismic-damping partition wall panels, and establishing a relational expression between a total friction hysteretic energy and a friction damping force and a target sliding displacement of the single group of seismic-damping partition wall panels, and the seismic resilience of the partition wall and the structure can be synergistically improved.