Shear-Wall Damping Mechanism for Amplified Seismic Energy Absorption
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Solution Overview
Problem
Conventional shock absorbing devices for buildings, especially those with obliquely mounted dampers, fail to fully utilize axial damping force to absorb seismic energy, leading to limited vibration reduction and increased installation costs due to the need for multiple devices with horizontally placed dampers.
Innovation Solution
A shock absorbing equipment with a shear-wall-like mechanism featuring a longitudinal transmission rod and horizontally mounted upper and lower dampers, which amplifies displacement by three to five times, allowing full utilization of damping force to absorb seismic energy and reduce vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If dampers are mounted obliquely between upper and lower beam-column connections, then the shock absorbing device can be installed with simpler structure, but the effective damping force is reduced to only the horizontal component (F×cos θ) of the axial damping force
Solution Approach 1:
Instead of mounting dampers obliquely and relying on horizontal components, the patent inverts the approach by mounting dampers horizontally and using a transmission rod at an angle. This allows the full axial damping force to be utilized horizontally while the transmission rod handles the angular connection to the beam-column joints.
2Reliability
If multiple shock absorbing devices with horizontally placed dampers are installed to fully utilize damping force, then the vibration damping effect is improved, but the installation cost increases and traffic flow and ambient lighting are affected
Solution Approach 1:
The patent merges the functions of multiple dampers into a single shock absorbing device. By combining horizontal dampers with an angular transmission rod, the device achieves the vibration damping effect of multiple devices while requiring only one installation location, thus reducing installation complexity and avoiding impact on traffic flow and lighting.
3Ease of operation
If a single shock absorbing device with oblique damper is used, then the installation impact on traffic flow and lighting is minimized, but the seismic energy absorption capacity is limited
Solution Approach 1:
The transmission rod acts as an intermediary between the horizontal damper and the oblique beam-column connections. It transfers the horizontal damping force to the diagonal structural members, enabling a single device to absorb seismic energy effectively while maintaining installation convenience with minimal impact on traffic and lighting.
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 equipment effectively absorbs destructive seismic energy, reduces the number of required installations, minimizes impact on traffic flow and ambient lighting, and enhances damping force, providing a compact and efficient solution for building vibration mitigation.
Implementation Method 1
The damper 40 is extended or shortened accordingly, so as to absorb part of seismic energy that causes the building to vibrate
Implementation Method 2
amplifies displacement by three to five times, allowing full utilization of damping force
Data Source
AI summary
A shock absorbing equipment having shear-wall-like mechanism with enhanced damping force for a building includes a longitudinal transmission rod, an upper dampers, and a lower dampers. The two upper dampers are mounted on the upper half wall. Two ends of each of the upper dampers is connected to the upper end of the longitudinal transmission rod and the upper half wall. The two lower dampers are mounted on the lower half wall. Two ends of each of the lower dampers is connected to the lower end of the longitudinal transmission rod and the lower half wall. The shock absorbing equipment sensitively amplifies a displacement between the floors caused by earthquake, so as to early dissipate seismic energy. Moreover, the needed number of the shock absorbing equipment for the building can also be reduced and impact on traffic flow and ambient lighting in the building can be reduced.