【Daily Question】12.21 Term Explanation: Prestressed Concrete
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This post was last edited by Catalyzing a Grain on 2016-1-4 at 11:29. Definition of a noun: Prestressed concrete is a type of concrete in which steel bars (or cables) are tensioned, thereby applying a certain compressive stress to the concrete in the tensioned areas before the reinforced concrete structure is subjected to external loads. Rewards for participation: +2 wealth for answers that are correct; +5 wealth for in-depth discussions; +8 wealth for participating in activities such as “My Most Crazy Moment”. [Petroleum and Chemicals-related activity] Registration page for “My Most Crazy Moment” activity: http://bbs.hcbbs.com/thread-1487895-1-1.html (Source: Haichuan Chemical Industry Forum). [Petroleum and Chemicals-related activity] Competition for the best imitation Song typeface: http://bbs.hcbbs.com/thread-1514512-1-1.html (Source: Haichuan Chemical Industry Forum)
To prevent cracks from appearing in the concrete too early, a pre-pressure is applied to the concrete before it is put into use (under load). This is achieved by manually tensioning the rebar in the tensile zones of the concrete; the force generated by the rebar’s contraction then exerts pressure on those tensile zones. This stored precompressive force, when the member is subjected to tensile forces due to external loads, first offsets the prepressure in the concrete in the tensioned area; only as the load increases does the concrete become tensiled. This limits the elongation of the concrete and delays or prevents the formation of cracks – this is what is known as prestressed concrete.
To prevent cracks from appearing in the concrete too early, a pre-pressure is applied to the concrete before it is put into use (under load). This is achieved by manually tensioning the rebar in the tensile zones of the concrete; the force generated by the rebar’s contraction then exerts pressure on those tensile zones.
To prevent cracks from appearing in concrete too early, prestress is applied to the concrete prior to its use. This is achieved by manually applying force to the steel rebar in the tensile zones of the concrete; the recoil force of the rebar then causes the concrete in those zones to be under stress first. This stored prestress helps to counteract the tension in the concrete when external loads exert force on the structure. As the load increases, the concrete begins to stretch under that force, but this process is limited, thereby delaying or preventing the appearance of cracks. This is what is known as concrete prestressing.
Prestressed concrete is designed to counter the issue of cracks appearing in concrete prematurely; before the components are put into use (under load), a prestress is applied to the concrete in advance. This is achieved by using artificial forces to tension the rebar in the tensile zones of the concrete, and the recoil force of the rebar is utilized to apply pressure to those tensile zones ahead of time. This stored precompressive force, when the member is subjected to tensile forces due to external loads, first offsets the prepressure in the concrete in the tensioned area; only as the load increases does the concrete become tensiled. This limits the elongation of the concrete and delays or prevents the formation of cracks – this is what is known as prestressed concrete.
Prestressed concrete is designed to counter the problem of cracks appearing in concrete too early. Before the components are put into use (under load), a prestress is applied to the concrete in advance; that is, in the tensile zones of the concrete, the rebar is stretched using artificial force, and the recoil force of the rebar is utilized to apply pressure to those tensile zones in advance. This stored precompressive force, when the member is subjected to tensile forces due to external loads, first offsets the prepressure in the concrete in the tensioned area; only as the load increases does the concrete become tensiled. This limits the elongation of the concrete and delays or prevents the formation of cracks – this is what is known as prestressed concrete.
To prevent cracks from appearing in the concrete too early, a pre-pressure is applied to the concrete before it is put into use (under load). This is achieved by manually tensioning the rebar in the tensile zones of the concrete; the force generated by the rebar’s contraction then exerts pressure on those tensile zones. This stored precompressive force, when the member is subjected to tensile forces due to external loads, first offsets the prepressure in the concrete in the tensioned area; only as the load increases does the concrete become tensiled. This limits the elongation of the concrete and delays or prevents the formation of cracks – this is what is known as prestressed concrete.
To prevent cracks from appearing in the concrete too early, a pre-pressure is applied to the concrete before it is put into use (under load). This is achieved by manually tensioning the rebar in the tensile zones of the concrete; the force generated by the rebar’s contraction then exerts pressure on those tensile zones. This stored precompressive force, when the member is subjected to tensile forces due to external loads, first offsets the prepressure in the concrete in the tensioned area; only as the load increases does the concrete become tensiled. This limits the elongation of the concrete and delays or prevents the formation of cracks – this is what is known as prestressed concrete.
To prevent cracks from appearing in the concrete too early, a pre-pressure is applied to the concrete before it is put into use (under load). This is achieved by manually tensioning the rebar in the tensile zones of the concrete; the force generated by the rebar’s contraction then exerts pressure on those tensile zones. This stored precompressive force, when the member is subjected to tensile forces due to external loads, first offsets the prepressure in the concrete in the tensioned area; only as the load increases does the concrete become tensiled. This limits the elongation of the concrete and delays or prevents the formation of cracks – this is what is known as prestressed concrete.
Prestressed concrete: Before the component is put into use (under load), a pre-tension is applied to the concrete. In the tensile zones of the concrete, the rebar is stretched using artificial forces, and the rebound force of the rebar is utilized to apply pressure to those tensile zones in advance. This stored precompressive force, when the member is subjected to tensile forces due to external loads, first offsets the prepressure in the concrete in the tensioned area; only as the load increases does the concrete become tensiled. This limits the elongation of the concrete and delays or prevents the formation of cracks – this is what is known as prestressed concrete.