1. Multi-dimensional isolation and mitigation device for building structure
The multi-dimensional isolation and mitigation device of building structure is kind of a device applied to building structures, which can realize horizontal and vertical isolation and mitigation at the same time. The main components are viscoelastic core pad, cylindrical viscoelastic damper and preloading spring. The device uses viscoelastic components to replace the traditional rubber, the energy dissipation capacity of viscoelastic components make the device maintain isolation effect and good damping effect at the same time, and combines the cylindrical damper, isolation support and preloading spring for vertical isolation and mitigation.
2. Multi-dimensional isolation and mitigation device for long-span structure
Multi-dimensional isolation and mitigation device for long-span structure is kind of a device applied to long-span structure, which can realize horizontal and vertical isolation and energy dissipation at the same time. The parallel connection of the traditional laminated support and the ordinary plate damper can not only support the structure like the ordinary support, but also effectively block and weaken the vibration of the structure from both horizontal and vertical directions when the vibration comes. At the same time, the main energy dissipation material of laminated bearing also uses the newly developed viscoelastic material to replace the traditional rubber. After testing, the viscoelastic material has a full elliptical force displacement hysteretic curve and shows excellent energy dissipation capacity, which makes the device not only have excellent vibration isolation performance as traditional laminated rubber bearing, but also dissipate vibration energy, and can better weaken the vibration response of the structure.
3. High damping multi-directional vibration isolation/mitigation device for subway adjacent buildings
In order to reduce the vibration impact of subway operation on adjacent buildings and reduce the impact of earthquake on superstructure, the joint laboratory has developed a spring damping cooperative vibration isolation/mitigation device. The device comprises an upper support, a lower steel plate, a coil spring and a combined viscoelastic circular simple damper placed in the coil spring. The combined viscoelastic circular damper comprises an inner sleeve steel cylinder, an outer sleeve steel cylinder and a viscoelastic damping layer vulcanized between the inner outer sleeve steel cylinder at high temperature. Based on the spring vibration isolation system, the device adopts viscoelastic damping materials with large damping ratio, stable performance, good sealing and suitable for engineering application to improve the energy dissipation capacity of the device system. It has a complete spring damping cooperative working system and can play an excellent role in vibration isolation and vibration reduction.
4. High damping multi-directional and wide frequency domain vibration isolation/damping device for high-speed railway viaduct
In order to control the vibration of high-speed railway viaduct under the joint excitation of train and earthquake, it is necessary to suppress the multi-directional vibration in a wide frequency range, and also have high robustness and stability. Therefore, a multi-directional and wide frequency domain vibration isolation mitigation device is invented, including relatively arranged upper steel plate, lower steel plate and viscoelastic support between the upper and lower steel plates; a viscoelastic damper is arranged outside the viscoelastic support. The viscoelastic damper is composed of an upper gear frame and a lower gear frame engaged with each other and viscoelastic materials wrapped outside the upper gear frame and the lower gear frame, and the gap is filled by vulcanization of viscoelastic materials; A pull-out steel cable is arranged between the viscoelastic support and the viscoelastic damper.
The tooth surface structure of the viscoelastic damper in the device can realize multi-directional vibration reduction, and can provide additional large damping and stiffness through the bite and extrusion of the tooth surface; The thick viscoelastic layer in the core is conducive to multi-directional deformation, isolation and dissipation of anisotropic vibration energy. In the case of high frequency and small amplitude vibration, the viscoelastic support and the thick viscoelastic layer of the damper provide low stiffness and high energy dissipation. In case of low frequency and large amplitude vibration, the flanges on both sides of H-shaped steel sheet in the support provide additional horizontal stiffness for the core support.
5. High damping multi-directional cooperative vibration isolation/mitigation device for civil precision platform
Aiming at the precise platform structure of civil engineering, a cooperative vibration isolation/mitigation device is invented, which is composed of viscoelastic part, viscous fluid part and air spring part. The viscoelastic part is mainly composed of viscoelastic materials with high energy dissipation; The viscous fluid part is composed of piston, silicone oil, etc., and a plurality of damping holes are arranged on the piston surface to increase the damping provided by the viscous fluid part; The air spring exists between the viscoelastic part and the viscous fluid part, forming an action and reaction relationship with the viscoelastic part, that is, the viscoelastic part acts as the sealing device of the air spring, and the air spring acts on the viscoelastic part to ensure the energy dissipation force of the viscoelastic part.
6. Multi-directional vibration control technology for large pipeline
During the service period of the pipeline, the external excitation force generated by sudden disasters such as earthquake and hurricane will be transmitted to the pipeline through the supporting structure, which may cause the vibration displacement and load of the pipeline system to exceed the allowable value, and even cause the vibration damage of the pipeline. Pipeline damage will affect the lifeline projects such as oil, water and natural gas, ranging from pipeline leakage to explosion, which will cause great secondary disasters and serious national economic losses. Pipeline vibration will also cause cracking of foundation and thermal insulation materials and affect the normal service performance of the pipeline. In addition, pipe vibration will produce noise and make people feel uncomfortable.
The multi-dimensional pipeline isolation and vibration reduction device developed by the joint laboratory team can effectively reduce the large vibration of the pipeline, improve the service condition of the pipeline, prolong the service life of the pipeline and reduce the project risk. The specific advantages of the device include: 1) it has both horizontal and vertical vibration isolation and mitigation capabilities, and can reduce pipeline vibration in multiple dimensions. 2) The hysteretic curve of viscoelastic damper is full, and the device has good energy dissipation capacity. 3) Large damping force can effectively prevent excessive displacement of impact response without time lag. 4) It can release the temperature deformation caused by slow thermal expansion. 5) The utility model has the advantages of simple structure, convenient installation, no wearing parts, no maintenance parts, basically whole cycle maintenance free, and high cost performance.
For now, the multi-dimensional isolation and vibration reduction device of building structure invented by the joint laboratory team has been successfully applied to the vibration reduction of many important projects such as Guandu people's Hospital, Panxi International Trade City and Xinbailucheng primary school. Among them, the typical large-scale building is Kunming Urban Planning Museum. The building structure adopts the architectural layout of large space and is designed as palace grid column network. Some large space column networks reach 39m and the construction area reaches 36300 square meters. The multi-dimensional seismic isolation of long-span structure has been successfully used in T2 terminal of Haikou Meilan International Airport. Haikou Meilan International Airport is a large-scale airport and regional hub airport in China. The construction goal of T2 terminal is to meet the annual passenger throughput of 35 million person times and the annual cargo and mail throughput of 400000 tons by 2025. It is located in a high-intensity earthquake area of 8 degrees (0.30g). The concrete structure of the terminal is 210 meters long from North to South and 749 meters wide from East to West. It is a super long large structure with a building area of 296000 square meters. The multi-dimensional isolation and mitigation device of long-span structure developed by the project team is used. The multi-dimensional isolation and vibration reduction device of pipeline structure has been successfully applied to pipeline vibration reduction in many major engineering projects such as Luoyang Petrochemical Engineering Corporation/Sinopec, Sinopec Jinling Petrochemical and Yan'an Refinery of Shaanxi Yanchang Petroleum.