The objective of the current study is to investigate and evaluate the flexural behavior of the continuity connection of precast prestressed concrete beams in negative bending when the tendons are located at the compression side. The experimental program included four T-shaped composite cantilever beams which were loaded up to failure. The main variable of the tests was the amount of prestress force of the connected precast beams. The reinforcement ratio of continuity connection was high. The ultimate flexural capacities and moment-curvature relations were calculated theoretically. A comparison was then carried out between both the experimental and theoretical results. These experiments revealed that prestress force did not influence the ultimate hogging moment capacity of the continuity connection, but it had an effect on its soffit's compression cracking and spalling of the concrete cover before failure. This study also indicated that confinement of the concrete had a massive influence on the connection's behavior, and it increased both its negative moment capacity and ductility.

中文翻译：

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连续预制预应力混凝土梁的负弯曲试验

当前研究的目的是调查和评估预制预应力混凝土梁连续连接在负弯曲时钢筋位于受压侧时的弯曲行为。实验程序包括四个 T 形复合悬臂梁，它们被加载到破坏。测试的主要变量是连接的预制梁的预应力大小。连续连接配筋率高。理论上计算了极限抗弯能力和弯矩-曲率关系。然后在实验和理论结果之间进行比较。这些实验表明，预应力不影响连续连接的最终承载弯矩能力，但对其拱腹有影响。s 混凝土保护层在破坏前的压缩开裂和剥落。这项研究还表明，混凝土的约束对连接的行为有很大的影响，它增加了它的负弯矩能力和延展性。