摘要
本文通过两批模型试验和若干工程实践 ,重点阐明了对高层建筑有明显经济效益的混合配筋预应力混凝土框架扁梁楼盖承受极限荷载时的破坏特征和受力裂缝分布状态。该结构在短期试验的极限荷载下不产生塑性铰。试验结果还表明了采用无粘结筋极限应力增量 Δσp 的改进经验公式 ,其计算值较接近于实测值。双向框架扁梁楼盖结构中 ,板助的内力和配筋不同于普通结构 。
In this paper,on the basis of experiments of two models and several practices of construction,the structural behavior of unbonded prestressed concrete floor with frame shallow- beam is discussed,such as behavior of ultimate limit state and distribution of loading cracks.The structure did notproduce plastic hinged joints.The test results also show that the improved em- pirical formula of ultimate stress incrementΔσpfor unbonded prestressed tendons agree well with the test results.The bending momentand reinforced steel used in the rectangulartwo-way ribbed slab sturctures are different from the ordinary structures,that is,the bending moment and rein- forced steel in the long span are greater than those of short span
出处
《建筑科学》
1997年第2期3-10,共8页
Building Science
基金
国家自然科学基金
建设部资助项目
