A刚结构（A steel structure）.doc

A刚结构（A steel structure） Chapter one 1, the current design code of steel structure in our country, when calculating the strength of the steel structure, stability, and the connection strength, design value, should be adopted when calculating strain and deformation should be adopted standard - 2, design method of steel structure in our country, in addition to the fatigue calculation by using probability theory as a foundation, partial coefficient expression of the limit state - 3, the design requirements of steel structure is safe and reliable, economic and reasonable, advanced technology, is equal to 4, the design of the steel under strength steel yield strength divided by the partial coefficient of material - 11, safety, applicability and durability of the structure is called the reliability of the structure 1. The characteristics of steel structure are briefly described - high light weight, good plasticity and toughness; The material is uniform and the assumption of mechanical calculation is consistent. Easy to make, short construction period; The quality of light; Poor corrosion resistance of steel; Steel is heat-resistant, but not fireproof; 2. Why is the steel relatively safe and reliable - with good plasticity and toughness 5. In terms of reliability, the steel structure should meet the requirements of basic functions Answer: (1) to withstand during normal construction and normal use of all kinds of work, including load, temperature change foundation uneven settlement, the effect of an earthquake of magnitude (2) has a good work performance during normal use (3) under the normal maintenance has enough durability (4) after the accident happening and can still maintain the overall stability of must In chapter 2 Steel under low temperature, the strength, plasticity, impact toughness lower - response of steel plastic indicators are: elongation, section ratings, mainly expressed in percentage elongation, in ordinary carbon steel, with the increase of carbon content,