外文翻译---浅析建筑材料钢结构检测-建筑结构(编辑修改稿)

外文翻译---浅析建筑材料钢结构检测-建筑结构(编辑修改稿)内容摘要：

er determination of drawn steel wire in case of obstacles in the middle. Such as Angle steel, wire, etc., must be in advance expenditure point on both ends right now, in order to make steel wire straightening. Advance expenditure point, measure the deflection values must be minus the average of the two fulcrum height, is39。 the actual deflection value. Endpoints at the same time to ensure that the span of a fixed position, and both ends have the specialist master mark endpoint endpoint and fixed position and the actual roof endpoint of the distance, in order to the actual measurement of the deflection of span value. C,The quality of the steel structure inspection and evaluation Geometry size deviation, the nonlinear ponents, the structure is the poor quality of the welding and riveting, primer and paint quality is bad, is the main defect of steel structure in the manufacturing stage。 Structure position deviation, transport and installation due to mechanical action local deformation, cause the distortion of the ponent and connection node ponent assembly is not accurate, installation quality is poor, packing or pack some fasteners, batten plate, less weld dimension deviation and so on, belong to the installation defects。 Actual effects in use process, deviates from the original design of the corrosion of materials and ponents caused by corrosion of the reduction of crosssectional area, under alternating load change metal structure strength and fatigue phenomenon and causes damage on the connection of defects in use. As a result of the existence of these defects and influence each other, make different degrees of damage of the structure as a whole and partial. The quality inspection of steel structure in addition to the material mechanics performance testing according to procedures and related to chemical position analysis, should carry on the bearing capacity, deformation, corrosion, damage detection and prehensive assessment, to determine their level of quality. (a) material inspection and measurement From the use point of view, strength, plasticity, weldability and cold short destructive is building the basic performance of steel. Monomial index of the material does not represent all of its features, must be based on the prehensive evaluation indicators of routine test. Assessment should also collect the following data for reference data: in the steel production of time, the supply of steel technology condition and product specifications. Must find out the steel grades, technical indicators, ultimate strength, yield strength, tensile elongation, cold, repeated bending, impact toughness, and chemical position, etc. Steel material mechanical test and chemical analysis results, should ply with the provisions of the corresponding procedures. (2) steel structure ponent deformation test and evaluation Steel structure of the final prehensive evaluation is made up of bearing capacity, deformation, corrosion, damage from four aspects carries on the prehensive consideration and analysis, and mainly carrying capacity level is given. About corrosion and damage of hierarchies, you may refer to the execution of construction acceptance specifications and regulations provisions in s。