Performance Requirements for Seismic Steel

Performance Requirements of Earthquake Resistant Steel

With the progress of construction technology and the increase in the height and complexity of various structures, the requirements for anti-seismic performance of steel are increasing. Earthquake resistant steel is the main material used in structures with high seismic intensity. Its performance requirements are very high. It not only needs to have good rigidity and toughness under normal temperature, but also It also needs to have good plastic properties, which can ensure its seismic stability and reliability.

First of all, earthquake-resistant steel should have good plasticity and toughness in order to ensure its seismic stability. For earthquakes of different seismic intensity, the seismic deformation of earthquake-resistant steel structure is used in the plastic state necessary to ensure the stability of the structure. Therefore, if the plasticity of steel is poor, the structure may not be able to withstand the quake and will be destroyed. Therefore, the plasticity of earthquake-resistant steel should be improved.

In addition, the seismic performance of earthquake-resistant steel should be good. This is because the higher the earthquake intensity, the greater the seismic force produced by the earthquake.Therefore, the seismic performance of earthquake-resistant steel also needs to meet certain requirements to cope with the seismic forces of larger magnitudes. This is because only by passing the seismic performance test can we really ensure that the steel structure is safe and reliable under seismic conditions.

In addition, toughness is also very important for earthquake-resistant steel. Earthquake-resistant steel should have good toughness and not be prone to cracks under the effect of earthquakes and thermal variation. The presence of cracks will reduce the seismic resistance of the structure, and even cause the structure to be destroyed. Therefore, earthquake-resistant steel should be required to have good toughness, so as to ensure the stability of the steel structure and the safety of people and equipment in the building.

Finally, the fabrication performance of earthquake-resistant steel should be good. Because earthquake-resistant steel needs to be treated with special welding methods, the welding performance should meet certain standards, so as to ensure the welding quality and ensure the stability of the structure. In addition, the cutting performance of earthquake-resistant steel should also meet certain requirements. The cutting performance affects the steering of steel cutting, and good steering can ensure the accuracy of steel connection size, so as to ensure the seismic stability of the structure.

In summary, earthquake-resistant steel should have good plasticity, seismic performance, toughness and fabrication performance to ensure the stability and reliability of the structure under seismic conditions. Only by meeting these requirements can the structure be able to withstand strong earthquakes and better withstand the test of time.

The seismic performance of steel is an important basis for the design of buildings and other structures. In the design, construction and application of the structure, in order to meet the seismic performance requirements of the structure, the seismic performance of steel must reach the required value. The specific requirements of the seismic performance of steel are mainly manifested in the following aspects:

Ductility: The ability to change shape when under stress before failure is referred to as ductility. Ductility is very important in steel structures subjected to earthquake loadings. A steel structure with a low ductility may become severely damaged or even collapse due to the large plastic deformations caused by the earthquake. The ductility of steel must have enough cover.

Rigidity: Steel structure with good rigidity will not cause large displacement in the structure when subjected to earthquake loads and can keep its integrity. The rigidity of the steel material itself is not particularly high and therefore should impose appropriate restraints on the structure.

Stiffness: The stiffness of the steel structure under earthquake loads is much easier to ensure than to satisfy the need of keeping rigidity and also maintain its integrity.

Cyclic Strength: High cyclic strength is one of the key factors that affect the seismic performance of steel in an earthquake. Steel materials with a low cyclic strength may suffer structural collapse due to exceeding the acceptable failure limit.

Fatigue Resistance: The ability of a steel structure to resist fatigue is also an important factor in its seismic performance. Steel structures undergoing large cyclical loadings may fail if the fatigue resistance is inadequate and fail the structure.

High notch sensitivity: The seismicity of steel on the notch tends to be higher than other steel, and the seismic performance of steel on the notch is low. Therefore, in the design of steel structure, the notch effect should be avoided as far as possible, or the notch effect should be taken into consideration and measures should be taken to strengthen it.

The seismic performance of steel is related to the life and safety of the structure, so it is an important index in evaluating the seismic performance of the structure. Steel must have the high degree of ductility, rigidity, stiffness,, cyclic strength and fatigue resistance and low notch sensitivity to meet the seismic performance requirements of the structure.