地大《钢结构基本原理》在线作业一（The basic principle of steel structure is one）.docVIP

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地大《钢结构基本原理》在线作业一（The basic principle of steel structure is one）.doc

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地大《钢结构基本原理》在线作业一（The basic principle of steel structure is one）

地大《钢结构基本原理》在线作业一（The basic principle of steel structure is one） The basic principle of steel structure is one Total score: 100 test time: -- Single topic selection (a total of 25 questions, 100 points.) 1. In the following factors, _____ has little influence on the elastic buckling bearing capacity of the pressure bar. A. Residual stress distribution of pressure poles B. Initial geometry deviation of the component C. The yield point of the material changes D. The eccentricity of the load Full marks: 4 points 2. In order to prevent the buckling of the plates in steel components, this practice is made to ______. A. Change the width of the plate B. Change the stress distribution in the cross section C. Increase cross-section area D. increase the moment of inertia of the cross section Full marks: 4 points 3. Bearing the structure of static load, the basic mechanical properties of the steel shall be (). A. Tensile strength and elongation B. Tensile strength, yield strength, elongation C. Tensile strength, yield strength, cold bending performance D. Yield strength, cold bending performance, elongation Full marks: 4 points 4. In the truss structure of the double Angle steel as the bar, the material can be crisp to avoid the weld of the node area, which can be realized by controlling the net spacing between the bars. The net spacing between the normal bars is (). A. 15 ~ 20 mm or more B. 25 ~ 30 mm or more C. 10 mm D. 40 mm Full marks: 4 points 5. One of the main factors for welding residual stress is ______. A. The plastic of the steel is too low B. The elasticity of the steel is too high C. the weld is too thick D. The heat distribution is unevenly distributed during welding Full marks: 4 points In the design of steel structure, it is considered that the steel is the ideal elastic-plastic body, which means the material before the yield point is (). inelastic B. the elastic elastic-plastic D. plastic Full marks: 4 points For steel construction, the chemical composition is