The importance of using the steel truss bearing: steel mesh steel damage to introduce the main factors are: 1) by load changes, extended service, norms and regulations change leads to inadequate bearing capacity of the structure; 2) the member is deformed due to various accidents , twisted, disability, depression, etc., resulting in the member section weakened rod warping, cracking and other connections; cause member or connection deformation, cracking and warping under 3) temperature difference effect; 4) due to erosion and corrosion chemicals and electrochemical corrosion resulting weakening of steel member section; 5) Other includes the design, manufacture, construction errors and improper use of the service period and other operations. Steel reinforcement technology there are three main measures: 1) cross-section reinforcement method: partial or along the full length of steel reinforcing member (steel truss bearing), even as the overall make joint force; 2) changing the calculation Jane Figure: add additional support (steel truss bearing), adjust the load distribution, reducing the level of internal forces of statically indeterminate structure bearing for forced displacement, reduce stress peaks; 3) Prestressed Cable Act: the use of high-strength cable reinforcement structural weaknesses or enhance the overall structure capacity, stiffness and stability degrees. Steel truss bearing performance and role: 1, can carry vertical loads; 2, with anti vertical tension performance, to ensure vertical seismic down when the structure is not out of line; 3, with anti horizontal force performance, to ensure the level of earthquake When the structure is not out of line; 4, can be adapted to the radial and circumferential displacement requirements; 5, can be adapted to the requirements of the corner in any direction; 6, damping bearings with good damping properties; 7, bearing force transmission through the sphere, necking phenomenon does not appear the force acting on the reaction force under the structure of relatively uniform; 8, bearing no rubber under pressure, the impact of aging on rubber bearings do not exist, and long service life. 

keywords: Steel truss bearing, steel truss bearing properties, steel truss bearing applications,