高立堂^1,2   董毓利²  袁爱民²
 （1．西安建筑科技大学　710055；　2．青岛建筑工程学院　266033）

[提要]  主要研究了受火无粘结预应力混凝土简支板的温度场分布和板的变形情况，并给出了钢筋保护层的厚度、预应力度对无粘结预应力混凝土简支板受火性能的影响。为无粘结预应力混凝土板的火灾行为的理论研究提供了依据。
[关键词]  混凝土  简支板  火灾  温度场  保护层厚度  无粘结预应力  预应力度

The behavior of simple supported slabs of unbonded prestressed concrete under fire is investigated. From the test results, the regularities of temperature field and deformation are presented, and the effect of different concrete covers and prestressing level on the behavior of the slabs is given. Results provide a basis for further research to explore fire behavior of prestressed concrete structures with unbonded tendon.
Keywords:  simple supported concrete slab;  fire; unbonded prestress concrete;  temperature field;  cover; prestressing level

    　参  考  文  献
1．华毅杰．预应力混凝土结构火灾反应及抗火性能研究．博士学位论文，同济大学，2002．
2．李明，朱永江，王正霖．高温下预应力筋和非预应力筋的力学性能．重庆建筑大学学报，1998，20(4)．
3. I.Cabrita Neves, Joao Paulo C. Rodrigues, Antonio de Padua Loureiro. Mechanical properties of reinforcing and prestressing steel after heating. Journal of Materials in Civil Engeering,1996.
4．建筑构件耐火试验办法(GB9978-88).