Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Bridge stay cable heat insulation and fire resistance grading protection structure and construction method thereof
The invention relates to a construction method of a bridge stay cable heat insulation and fire resistance grading protection structure. The grading protection structure is used for carrying out regional protection on a stay cable, and comprises: a first-level protection region and a second-level protection region, wherein the vertical distance between the first-level protection area and a bridge floor is 11-20 m, and heat insulation and fire resistance protection meeting protection standard A are adopted; the vertical distance between the second-level protection area and the bridge floor is smaller than 11 m, and heat insulation and fire resistance protection meeting the protection standard A and protection standard B at the same time is adopted. And the winding directions of fiber composite material wrapping tapes in the heat insulation and fire resistance protection structures A and B are respectively that alpha 1 is more than 30 DEG and less than or equal to 35 DEG, and alpha 2 is more than or equal to 15 DEG and less than or equal to 30 DEG. Compared with the prior art, a bridge stay cable heat insulation and fire resistance protection method in the invention has the followingadvantages: according to the fire performance characteristics of the stay cable in different types of vehicle fires, different protection grade areas can be arranged along the height of the stay cable, the target requirements that the stay cable is not damaged by oil tank truck fires and is not damaged by cars, passenger cars and trucks fires are met with a small amount of protection materials, and the economical efficiency of a protection system is remarkably improved.
本发明涉及一种桥梁斜拉索隔热抗火分级防护结构的施工方法，对斜拉索进行分区域防护，包括：一级防护区域，距桥面垂直距离11m～20m，采用满足防护标准A的隔热抗火防护；二级防护区域，距桥面垂直距离11m以下，采用同时满足防护标准A和防护标准B的隔热抗火防护。隔热抗火防护结构A与B中纤维复合材料缠包带的缠绕方向分别为30°＜α≤35°、15°≤α≤30°。与现有技术相比，本发明具中的桥梁斜拉索隔热抗火的防护方法，可以根据斜拉索在不同类型车辆火灾下的受火性能特点，沿拉索高度设置不同防护等级区域，以较少的防护材料用量实现斜拉索“油罐车火灾不破坏，小汽车、客车、货车火灾不损伤”的目标需求，显著地提高防护体系的经济性。
Bridge stay cable heat insulation and fire resistance grading protection structure and construction method thereof
The invention relates to a construction method of a bridge stay cable heat insulation and fire resistance grading protection structure. The grading protection structure is used for carrying out regional protection on a stay cable, and comprises: a first-level protection region and a second-level protection region, wherein the vertical distance between the first-level protection area and a bridge floor is 11-20 m, and heat insulation and fire resistance protection meeting protection standard A are adopted; the vertical distance between the second-level protection area and the bridge floor is smaller than 11 m, and heat insulation and fire resistance protection meeting the protection standard A and protection standard B at the same time is adopted. And the winding directions of fiber composite material wrapping tapes in the heat insulation and fire resistance protection structures A and B are respectively that alpha 1 is more than 30 DEG and less than or equal to 35 DEG, and alpha 2 is more than or equal to 15 DEG and less than or equal to 30 DEG. Compared with the prior art, a bridge stay cable heat insulation and fire resistance protection method in the invention has the followingadvantages: according to the fire performance characteristics of the stay cable in different types of vehicle fires, different protection grade areas can be arranged along the height of the stay cable, the target requirements that the stay cable is not damaged by oil tank truck fires and is not damaged by cars, passenger cars and trucks fires are met with a small amount of protection materials, and the economical efficiency of a protection system is remarkably improved.
本发明涉及一种桥梁斜拉索隔热抗火分级防护结构的施工方法，对斜拉索进行分区域防护，包括：一级防护区域，距桥面垂直距离11m～20m，采用满足防护标准A的隔热抗火防护；二级防护区域，距桥面垂直距离11m以下，采用同时满足防护标准A和防护标准B的隔热抗火防护。隔热抗火防护结构A与B中纤维复合材料缠包带的缠绕方向分别为30°＜α≤35°、15°≤α≤30°。与现有技术相比，本发明具中的桥梁斜拉索隔热抗火的防护方法，可以根据斜拉索在不同类型车辆火灾下的受火性能特点，沿拉索高度设置不同防护等级区域，以较少的防护材料用量实现斜拉索“油罐车火灾不破坏，小汽车、客车、货车火灾不损伤”的目标需求，显著地提高防护体系的经济性。
Bridge stay cable heat insulation and fire resistance grading protection structure and construction method thereof
一种桥梁斜拉索隔热抗火分级防护结构及其施工方法
ZHANG SHAOJIN (Autor:in) / RUAN XIN (Autor:in) / ZHAO CHAO (Autor:in) / HUO NINGNING (Autor:in) / WANG YONG (Autor:in) / XUE XIAOWEI (Autor:in)
03.07.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
E01D
BRIDGES
,
Brücken
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