折线先张法混凝土预应力梁受力裂缝分析

The Analysis for Prestressed Concrete Beams Stressing Crack With Broken Line Pretensioning Method

折线先张法混凝土预应力梁避免了后张法及普通先张法梁体在耐久性和施工工艺等方面的缺点,较为有效地控制了梁体裂缝出现和延伸。本文通过对后张法及折线先张法预应力梁体进行受力后裂缝分析,验证了理论计算与室内试验的正确性,表明折线先张预应力梁体良好的受力性能。

The pretensioned concrete prestressed beam which has broken lines avoids the defects of the post-ten.sioned and ordinary pretensioned beam in durability and construction technology,it can effectively controls the ap.pearance and extension of beam cracks.This paper proved to be correct of the theoretical calculation and laboratory test by analysing post-tensioning method and broken line pretensioning method,the results showed that the preten.sioned concrete prestressed beam which had broken lines had good mechanical properties.