【Daily Discussion】Utilities - Civil Engineering - 20210513
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Why is the controlled stress value higher in the pre-tensioning method than in the post-tensioning method? Answer: This is because the concrete in prestressed members is subjected to elastic compression only after the prestressing tendons are released, whereas the concrete in post-tensioned members is subjected to elastic compression during the tensioning of the prestressing tendons; as a result, the amount of prestress loss due to elastic compression is greater in prestressed members than in post-tensioned members. Therefore, the tension control stress for pre-tensioning methods is set at a higher value than that for post-tensioning methods. Feel free to participate actively in the discussions – the system offers generous rewards for answering questions from VIP members! ! !
This is because the concrete in prestressed members experiences elastic compression only after the prestressing tendons are released, whereas the concrete in post-tensioned members experiences elastic compression during the tensioning of the prestressing tendons. Therefore, due to the greater prestress loss caused by elastic compression in the pretensioning method, the tension control stress value for this method is higher than that for the post-tensioning method.
Since the concrete in prestressed members is subjected to elastic compression only after the prestressing tendons are released, whereas the concrete in post-tensioned members is subjected to elastic compression during the tensioning of the prestressing tendons, the amount of prestress loss due to elastic compression is greater in prestressed members than in post-tensioned members. Therefore, the tension control stress for pre-tensioning methods is set at a higher value than that for post-tensioning methods
This is because the concrete in prestressed members experiences elastic compression only after the prestressing tendons are released, whereas the concrete in post-tensioned members experiences elastic compression during the tensioning of the prestressing tendons. Therefore, the prestress loss due to elastic compression is greater in the pretensioning method than in the post-tensioning method; as a result, the tension control stress value for the pretensioning method is higher than that for the post-tensioning method
This is because the concrete in prestressed members experiences elastic compression only after the prestressing tendons are released, whereas the concrete in post-tensioned members experiences elastic compression during the tensioning of the prestressing tendons. Therefore, the prestress loss due to elastic compression is greater in the pretensioning method than in the post-tensioning method, which results in a higher tension control stress value for the pretensioning method.
This is because the concrete in prestressed members experiences elastic compression only after the prestressing tendons are released, whereas the concrete in post-tensioned members experiences elastic compression during the tensioning of the prestressing tendons. Therefore, the prestress loss due to elastic compression is greater in the pretensioning method than in the post-tensioning method; as a result, the tension control stress value for the pretensioning method is higher than that for the post-tensioning method
This is because the concrete in prestressed members experiences elastic compression only after the prestressing tendons are released, whereas the concrete in post-tensioned members experiences elastic compression during the tensioning of the prestressing tendons. Therefore, the prestress loss due to elastic compression is greater in the pretensioning method than in the post-tensioning method, which results in a higher tension control stress value for the pretensioning method.
In simple terms, the prestress loss in the post-tensioning method is less than that in the pre-tensioning method; therefore, the value used for tension control is generally lower
This is because the concrete in prestressed members experiences elastic compression only after the prestressing tendons are released, whereas the concrete in post-tensioned members experiences elastic compression during the tensioning of the prestressing tendons. Therefore, the prestress loss due to elastic compression is greater in the pretensioning method than in the post-tensioning method; as a result, the tension control stress value for the pretensioning method is higher than that for the post-tensioning method
This is because the concrete in prestressed members experiences elastic compression only after the prestressing tendons are released, whereas the concrete in post-tensioned members experiences elastic compression during the tensioning of the prestressing tendons. Therefore, due to the greater prestress loss caused by elastic compression in the pretensioning method, the tension control stress value for this method is higher than that for the post-tensioning method.
Since the concrete in prestressed members is subjected to elastic compression only after the prestressing tendons are released, whereas the concrete in post-tensioned members is subjected to elastic compression during the tensioning of the prestressing tendons, the amount of prestress loss due to elastic compression is greater in prestressed members than in post-tensioned members.