【摘要】 针对无粘结预应力梁的特点 ,对集中荷载作用下抛物线布筋的无粘结部分预应力混凝土简支梁和连续梁进行对比试验 ,分析了它们的受弯性能。结果表明 ,合理配筋的两跨同时对称加载的连续梁能在形成充分塑性铰后而破坏 ,无粘筋极限应力增量有所提高 ,而连续梁的极限承载力有较大提高。更多还原

【Abstract】 Two continuous beams have been compared with two simply supported beams through experimental study of the beams of unbonded prestressed concrete with tendons of parabolic curve profile under concentrated load.Tests on bending behavior show that two span contiuous beam with certain reinforcement index under symmetric loads may fail when three plastic hinges occur. Compared with the simply supported beams, the continuous beams have gained a little higher increment of ultimate stresses and a much higher ultimate bending capactity.更多还原