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Damper application principle and characteristics
Release Time：2018-07-17 The number of clicks：
First, the principle and characteristics of mass tuned damper (TMD)
When the structure vibrates under the intense external action, the TMD subsystem vibrates together, and the inertial force of the TMD relative motion attack reacts to the structure, tuning the inertial force to control the vibration of the structure, TMD system The natural vibration frequency is basically combined with the natural vibration frequency of a certain vibration mode of the structure, and the TMD has a good effect on the vibration response control of the vibration mode.
1 small size, can be equipment inside the steel beam
2 Use fixed spring compression type planning to avoid potential safety hazards after TMD suspension accidental cracking when hanging spring pull-up planning equipment
3 its damping force can be dispatched in real time on site;
4 Use special structure, so that its spring stiffness can be dispatched in real time on the equipment site;
5 There are quality block determination equipment, which can be carried out together during the construction of the main structure, shortening the construction period
6 energy-consuming ability, not affected by load frequency
Second, the principle and characteristics of the contra-type damper
The metal composite anti-damper damper converts the vibration energy of the building into thermal energy absorption when the relative displacement of the two contact surfaces occurs, and the opposite contact force is exerted on the contact surface.
1) Simple structure, convenient equipment and easy to open
2) Stable within the range of environmental temperature changes
3) No protection in normal operation
4) No need to replace after the earthquake in the small earthquake
5) Product shape planning and active
Third, the planning plan comparison
Comparison between traditional seismic planning and energy dissipation planning
Traditional earthquake-resistant planning
Energy dissipation plan
Safety is difficult to ensure: due to the random nature of the earthquake, the degree of damage to the building structure and the possibility of smashing are difficult to control.
Under the action of earthquake, the structural acceleration and velocity echo are smaller than the conventional structure, and can be used to advance the function of the house through the seismic work of the forward building.
Adaptability is bound: Allowing the building structure to undergo a certain degree of damage during the earthquake, considering only the earthquake resistance of the structure itself, without considering internal equipment.
It takes up less space, is settled and active, and has less restraint on the use of the building. In the future, it can change the orientation according to the needs. It can advance the comfort of the building and protect the internal equipment.
Poor economy: Resist the earthquake by increasing the structural section and increasing the reinforcement. The result is that the larger the section, the greater the stiffness and the greater the seismic effect.
The amount of wet work is small, the construction time is short, and the construction cost is saved.
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