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简述了次弯矩的的概念及产生机理 ,分析了次弯矩对结构在各个受力阶段的使用性能的影响 ,对工程中常用的的无粘结预应力混凝土结构的内力重分布及次弯矩在极限荷载下的变化情况做了初步分析 ,并提出了一些建议。
The conception and mechanism of secondary moment are briefly introduced. The influence of secondary moment on the performance of the structure in various stress phases is analyzed. The internal force redistribution and the secondary force of the common unbonded prestressed concrete structure Bending moment in the ultimate load changes made a preliminary analysis and made some suggestions.