Extruded aluminum alloy profiles for construction bridges

Expanded aluminum alloy profiles for construction bridges has a long history ‚ But the dosage is not large ‚ The development speed is not fast either ‚ The reason is that the strength of aluminum is not high enough ‚ It cannot meet the structural requirements. in addition ‚ The price of aluminum is higher than that of steel ‚ Increase the cost of the bridge. Replacing steel with aluminum in bridge structure ‚ The purpose is to reduce the bridge quality, prolong the service life and reduce the maintenance cost ‚ The aluminum bridge requires little maintenance during use ‚ The steel bridge should be maintained every few years.

Extruded aluminum alloy profiles for construction bridges

Advantages of expanded aluminum alloy profiles for construction bridges:

Advantages of aluminum

Aluminum alloy extruded profile is one of the excellent structural materials for building bridges ‚ It is worth popularizing and applying ‚ Its basic advantages can be summarized as follows:

• low density ‚ About one third of steel;
• the strength can be equivalent to that of low carbon steel (see Table 1) ‚ Therefore, the specific strength (strength / mass ratio) is much higher than that of steel;
• strong corrosion resistance ‚ It is slightly corroded by rainwater and road salt ‚ Do not paint after construction ‚ There is no need for regular maintenance during the service period maintain;

• high toughness ‚ Resistance to low plasticity fracture ‚ No low temperature brittleness ‚ Its mechanical properties increase with the decrease of temperature;
• strong extrudability ‚ This is important ‚ It can produce various profiles with complex sections required by designers ‚ Increase bearing capacity ‚ Without expensive and time-consuming cutting ‚ It can produce variable section profiles;
• long and wide hollow profiles can be extruded ‚ It can minimize the number of material blocks of the bridge ‚ Especially the application of friction stir welding ‚ For

Simplifying the manufacturing process plays a great role;

• due to the application of large extruded materials and their relatively light weight ‚ The bridge can be prefabricated in the factory ‚ It is beneficial to reduce manufacturing cost and transportation cost ‚ Shorten the installation date of the bridge ‚ Short impact on traffic;
• strong recyclability ‚ Almost all aluminum alloy bridges can be recycled after their use ‚ It is of great significance to the recycling of resources.

Aluminum bridge is lighter than steel bridge, which will bring many self-evident advantages: the most important thing is to reduce the static load on the superstructure ‚ Increase

Vehicle load ‚ At the same time, it can compensate, that is, offset the adverse effects of steel beams and cables on the superstructure and bridge foundation; It is more important for long-span bridges ‚ It can reduce the total load of the bridge; In the earthquake area ‚ Reducing the static load of the bridge can reduce the lateral force exerted by the earthquake ‚ The magnitude of this lateral force is proportional to the static load of the bridge.