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首页> 美国政府科技报告 >Ultimate Load Carrying Capacity of Unbonded Prestressed Reinforced Concrete Beams
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Ultimate Load Carrying Capacity of Unbonded Prestressed Reinforced Concrete Beams

机译：无粘结预应力钢筋混凝土梁的极限承载力

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In the report the plastic theory for reinforced concrete structure is investigated in relation to beams with unbonded tendons. Concerning the bending resistance of beams with unbonded tendons, it has been found previously, that the stress at failure in the prestressing bars is often lower than in a corresponding beams with bonded tendons. This is confirmed by the plastic analysis and according to this, the phenomenon is due to the fact, that the transition from the normally reinforced case to the overreinforced case takes place at about half the compression depth compared to a beam with bonded tendons. The shear resistance of beams with unbonded tendons can be treated by the plastic theory if in some cases the value of the effectiveness factor is put at a lower value than for beams with bonded tendons. (Copyright (c) by Chen Ganwei, M.P. Nielsen & K. Janos 1990.)

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