High-strength prestressed steel strand What is its main function?

High-strength prestressed steel strand is made of steel wires wound together. The carbon steel surface can be coated with zinc, zinc-aluminum alloy, aluminum, copper, epoxy resin, etc., according to customer needs. In daily life, the application of steel strands is becoming increasingly widespread in China. Our consensus is that steel strands are mainly used in civil construction projects with large static loads, such as bridges, large-span factories, or high-rise buildings. What is the main function of high-strength prestressed steel strand?

1. Ordinary prestressed steel strand is bonded prestressed steel strand. Due to the lack of plastic sheath isolation, it is used for bonding concrete during pre-tensioning and grouting during post-tensioning.

2. Before the engineering components combination fittings bear external bearing pressure, prestress should be applied to the reinforcement in the tensile combination fittings to improve the stiffness of the combination fittings, delay the cracking time, and improve the durability of the combination fittings. In terms of mechanical composition, this means applying prestress to them. Its advantage is that it can improve the stiffness of the components themselves, reduce vibration and elastic shape changes. This can significantly improve the elastic strength of the tensile module, making the original resistance stronger.

3. Before the components can withstand the external environmental load analysis of the enterprise, prestress is applied to the tensile area under the influence of external factors to improve the performance of the economic components. This social component design is called prestressed concrete components. For example, for a wooden barrel, before filling with water, iron hoops or bamboo hoops are used to tighten the barrel wall, and hoop compressive stress is generated on the barrel wall. If the compressive stress we apply causes tensile stress caused by water pressure, the cylinder will not crack or leak. Applying prestress to a circular water pool is like a ring in a barrel. Similarly, applying prestress to the bending combination fittings before increasing the bearing pressure will produce a shape change opposite to the shape change caused by the bearing pressure. Before the bearing pressure causes the combination fittings to change shape in another direction, it must first offset the shape change opposite to the bearing pressure research direction, and then the shape change can continue to exist along the bearing pressure direction according to the combination fittings information. In this way, prestress is equivalent to adding a protective layer to the combination fittings.

What is the role of high-strength prestressed steel strand in the wiring process? When connecting wires, it is necessary to measure whether the grounding resistance is small enough. Users of high-rise residential buildings use water pipes or gas pipes as grounding bodies. Because the surface of water pipes and gas pipes is coated with anti-corrosion coating, and the water pipe joints are sealed with plastic, it is very dangerous. The underground part of the water pipe uses PVC pipes, but the conductivity is poor, and there is no safety guarantee. When repairing steel strands, a multimeter DC voltage block is generally used to test whether the X1 voltage of the workbench socket can be used normally. If it is normal, it indicates that the front-end working circuit can work, and the fault mainly occurs in the back end. Check whether the plug and socket are in poor contact. If the DC voltage is normal and the plug and socket are in good contact, check whether the solenoid valve workbench coil is open circuit or inter-turn short circuit. Use a multimeter to measure the coil of the magnetic chuck. If an open circuit or resistance less than the normal value occurs, the coil of the electromagnetic platform is burned out. At this time, replace the same type of electromagnetic platform coil.