The Research On The Damping Mechanism Of A New Type Steel Damper And It's Function In Bridge Anti-seismic

Damping is to make the free vibration attenuation of friction and other obstacles force, and placed in the structure of the particular component can provide the resistance movement, energy depletion of the device, called the damper. Effective damper settings can improve the structure of the earthquake under the performance, in particular, to protect bridges and other nationals such as the lifeline of the earthquake in normal use. The use of the bridge project damper products has become the consensus of bridge engineers at home and abroad, in Europe and the United States, Japan, New Zealand and other countries and regions, the bridge design must consider the use of dampers to seismic and wind. My new bridge if the Sutong Bridge has begun to use the damper, but are limited to imported products, domestic production of high-performance without good damper capacity. The damper system for in-depth study is necessary.In this paper, the existing domestic and international damper on the type of work carried out analysis on the basis of this research and development of two new metal damper, its design theory, finite element validation, test and dynamic analysis of the entire bridge for engineering applications To provide a scientific basis.This paper will be available at home and abroad to sum up damper type classification, a representative of each type of damper products structure, working mechanism analysis, theoretical mechanics model simplification, summing up its terms of use and advantages and disadvantages.This paper has developed two new metal damper: E-and C-type metal damper. First identified through theoretical design of the metal damper section of the structure and size, and finite element analysis verification of the correctness of the design and construction projects in Shanghai Tongji quality inspection stations to determine their performance. Research shows that:â‘ in the design load, the damper at the same time to enter the area of plastic, energy absorption into the plastic deformation ability;â‘¡finite element analysis and design theory of value is very close to verify the correctness of the theory of design ;â‘¢test results and finite element analysis of a matching product performance guarantee.In this paper, two common domestic railway bridge-beam set up in a number of new products damper where the seismic performance. And not set damper bridge bearing the conventional arrangement of comparison, mainly inspected Liaodun top of the pier at the end of the level of effectiveness and reduce the shear damper the ability to absorb seismic energy. Research shows that:â‘ set up E-type metal damper can significantly reduce the top pier, the pier at the end of the level of shear, a strong ability to absorb the earthquake;â‘¡friction isolation damper settings can significantly reduce the top pier, the pier at the end of the level of shear, absorbing earthquake Ability;â‘¢set speed locking device can significantly reduce the top pier, the pier at the end of the level of shear, absorb seismic energy rarely, played a major role similar to fixed-bearing, power transmission to the earthquake in the lower part of the structure.To sum up, this paper has been developed E-and C-type metal damper for domestic first. Development of the damper is simple in structure, energy and strong, stable performance, and other characteristics. Application of this metal damper can significantly improve the bridge seismic performance, lower cost of the bridge project. In this paper, the theoretical analysis, finite element analysis, test, the entire bridge seismic analysis to damper the application provides a scientific basis.