【摘要】 双预应力混凝土梁是同时采用张拉预应力钢筋和预压预应力钢筋而在梁截面上建立预应力的预应力混凝土梁。对双预应力混凝土梁的发展、特点及其应用进行了简要说明 ,详细介绍了双预应力的工作原理 ,并且指出由于某些特殊原因 ,双预应力混凝土梁仍处于初步使用阶段 ,还有待进一步完善更多还原

【Abstract】 The bi prestress concrete beam is prestress concrete beam spontaneous strike adopting tension prestress steel bar and precompressed prestress steel bar at one time to establish prestress on the section of the beam. In this paper the development, characteristics and application of bi prestress concrete beam are elaborated. The work principle of i prestress concrete beam is introduced. Author points out that because of some special reasons the bi prestress concrete beam is in preliminary application and waiting to prefect stage.更多还原