李志方  王志浩  李  蓬
    （清华大学土木工程系 北京 100084）

[提要]  介绍了无粘结预应力t昆凝土梁静、快速加载的试验结果和试件的位移延性。通过简化分析，并根据有关的静、快速荷载下的钢筋混凝土、预应力混凝土梁的试验数据，提出了适用于钢筋混凝土及预应力混凝土梁在静速及快速荷载下的延性比计算公式。
[关键词]  无粘结预应力混凝土 延性 快速荷载

Based on the comparative tests of nine unbonded prestressed concrete(UBPC) beams under rapid and static loads, the ductility of UBPC was discussed. The formulas which can be used to calculate the ductility ratio of the reinforced concrete and the UBPC under static and rapid loads were drawn.
Keywords: unbonded prestressed concrete(UBPC); ductility; rapid loads