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对5根预应力钢筋混凝土受弯试件经历不同冻融次数后的承载性能展开试验研究,以揭示冻融对预应力钢筋混凝土受弯试件承载性能的影响规律,试验结果表明:随着冻融次数增加,试件受弯破坏过程加快,试件的抗裂性能和极限承载能力逐渐下降,破坏时极限变形能力下降,试件延性降低,具有脆性破坏的发展趋势。应用有限元软件ANSYS对冻融后预应力钢筋混凝土受弯试件的承载性能进行数值模拟,结果表明,数值模拟的荷载挠度曲线与试验结果吻合较好,能较真实地反映冻融后预应力混凝土受弯构件的承载性能。
Experimental study on the bearing capacity of five prestressed concrete flexural specimens subjected to different numbers of freeze-thaw cycles revealed the influence of freeze-thaw on the bearing capacity of prestressed reinforced concrete specimens. The experimental results show that with the increase of The number of melting increases, the bending failure process of the specimen accelerates, the crack resistance and ultimate bearing capacity of the specimen decrease gradually, the ultimate deformation capacity decreases and the ductility of the specimen decreases, which has the tendency of brittle failure. The finite element software ANSYS is used to simulate the bearing capacity of pre-stressed and post-thaw prestressed concrete flexural specimens. The results show that the numerical simulation of load deflection curves is in good agreement with the experimental results and can more accurately reflect the post-freeze-thaw prestress Bearing capacity of concrete flexural members.