Ouweimu rubber company achievement bridge wind resistant measures in new areas
In October 28, 2016, chishi bridge officially opened the smooth opening of trial operation, it declared Xiamen Chengdu Expressway Hunan section opened up, also marked by the Liuzhou ouweimu machinery wholly owned subsidiary of Limited by Share Ltd - Liuzhou Oriental Engineering Rubber Products Co. Ltd. (hereinafter referred to as ouweimu rubber company) (vibration isolation) products and system solutions provider, officially entered the the bridge in the construction and use of the new field of wind vibration.
Chishi bridge is called "super bridge, the main span of 380 meters, the bridge is 186 meters, is the world's first large span bridges with the same type of multi tower cable-stayed bridge with high pier concrete. Chishi bridge engineering high technology content, huge scale, complex technology, opened up a domestic cable-stayed bridge vibration and wind resistant measures application of tuned mass damper construction application precedent, Liuzhou Oriental Engineering Rubber Products Co. Ltd. and Hunan University academician Chen Zhengqing jointly developed ECD type electric eddy current tuned mass damper and magnetic products regulating two innovative products damper.
Determine the chishi bridge project scheme: chishi bridge girder with cantilever construction hanging basket, hanging basket, carrying weight 260 tons 750 tons 1000 tons of concrete, super weight; girder span of 380 meters, the concrete bridge span in the world, the largest single cantilever deck distance of 190 meters, 180 meters high. Under normal circumstances, the wind speed is about 6, the wind and rain days are usually more than 10, and the instantaneous wind speed can reach 12 level. It has adverse effect on the cantilever state of bridge construction, and the safety risk is extremely high. Therefore, the conventional wind resistant measures have been unable to meet the security needs of chishi bridge. Our company actively participated in the discussions of research and program design experts, the owners and construction units, and finally developed the "drop wind provided on the girder cable and wind resistant measures at the end of the beam installation of transverse eddy current TMD tilting device". Through in the cantilever side tension cable, to reduce the wind-induced buffeting response of bridge construction, through the installation of eddy current tuned mass damper in beam end (electric eddy TMD) device to reduce the wind-induced lateral buffeting response, so as to achieve the purpose of comprehensive control, ensure the safety of the Bridge Girder Cantilever construction;
"The wind resistance cable" the successful implementation of the Bridge Girder Cantilever Construction against the 12 winds, further improving the wind stability and safety of the girder during construction, realize the innovation of bridge wind resistant measures on technology. This technique is the first application in the construction of super large bridges in china. Eddy current tuned mass damper, the eddy current damping vibration energy of the structure, is a kind of flexible structure in itself decreases under the external excitation vibration response is an effective vibration reduction scheme.
At present, TMD damping technology is mainly used in the structure with relatively concentrated vibration frequency, for example
(1) vibration footbridge, flexible bridge, arch bridge suspender and boarding bridges of bridge structure;
(2) high-rise buildings, TV towers and chimneys and other high-rise structures to reduce vibration;
(3) structural vibration reduction of EHV transmission towers or large span transmission towers;
(4) other engineering structures, such as structures affected by wind vibration during construction.
At present, ouweimu rubber company TMD technology has been successfully applied to the Nanning Wuxu Airport. The pedestrian bridge, Yulin Garden Expo pedestrian bridge engineering, which is mainly to reduce vibration engineering using sloshing. The chishi bridge is first applied to the vibration of the structure in the construction process control, reduce the wind-induced response in order to ensure the safety of construction.
Chishi bridge, the bridge span is longer, the cable is very long, can not be avoided to solve the vibration problem of cable. The permanent magnet adjustable damper solves the wind vibration problem of the stay cable. The girder of chishi bridge a total of 16, 32 drop wind cable girder, each side of the symmetrical arrangement of main tower of two, each of the two down wind cable were located on both sides of the bridge girder. The cable vibration induced by rain wind induced vibration of cable-stayed bridge is very good for vibration reduction.
Ouweimu rubber company system maintenance as isolation products production, procurement, installation and post solutions provider, the eddy current tuned mass damper and permanent magnet adjustable damper products industry leading. Vibration control project of chishi bridge chose ouweimu rubber company, mainly Chinese academicians and experts team behind the powerful technical support and product development capabilities, complete production and testing equipment, perfect quality system and other advantages.
