[I know] the main design method of steel structure-Shenyang Century Weiye Steel Structure Co., Ltd

[I know] the main design method of steel structure

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2016-09-12

In the modern construction market, the sudden emergence of steel structure engineering has greatly promoted the construction of steel structures and the reduction of engineering time. It has been favored by many construction projects. Many factories use steel structures to build steel structures, public rain. The shed is now also built into a steel structure canopy. Then the design of the steel structure has received everyone's attention. Let's talk about the method of steel structure design.

The probabilistic limit state design method is the basic method of engineering structure design in China and the basic method of steel structure design.

If the structure exceeds a certain state, it cannot meet a certain functional requirement of the design. This specific state is called the limit state of the function. Like other building structures, the limit states of steel structures are divided into load capacity limit states and normal use limit states.

1 Load capacity limit state: refers to the limit state when the structure or component reaches the maximum load capacity or the deformation that is not suitable for continued bearing, including overturning, strength damage, loss of stability, fatigue damage, structure becoming a mobile system or excessive Plastic deformation.

2 Normal use limit state: refers to the limit state when the structure or component reaches a certain limit of normal use or durability. When this limit is reached, although the structure or component still has the ability to continue to carry, the deformation produced under normal load has made the structure or component unsuitable for continued use, including excessive deformation and localization under static loading. Damage, or severe vibrations caused by dynamic loads.

The resistance of the structure or member is represented by a ruler, and the effect of the action on the structural member is represented by S, and Z = R - S = 0 represents the limit state. Because R and. s is subject to many random factors and has uncertainty. It is a random variable and should be analyzed by probability theory.

The fundamental problem to be solved in the design of steel structures is to choose an optimal balance between the reliability of the structure and the economy, so that the structure built by the most economical way can meet various predetermined functional requirements with appropriate reliability. The theory of structural reliability has developed rapidly in recent years. Structural design has entered the limit state design method based on probability theory from the traditional fixed value design method.

Referred to as the probability limit state design method.

The probabilistic limit state design method takes the factors affecting the structure function as random design variables, and thus can only achieve a certain probability guarantee for the predetermined function of the designed structure, that is, any design can not guarantee absolute safety, but there is a certain risk. However, as long as the probability of failure is small enough to be acceptable, the designed structure is considered safe.