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Comprehensive experimental investigation on mechanical behavior for types of reinforced concrete Haunched beam

机译：钢筋混凝土吊梁力学性能的综合试验研究

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摘要

This study presents a comprehensive experimental investigation on mostly encountered types of Reinforced Concrete Haunched Beams (RCHBs) where three modes of RCHBs investigated; the diversity of studied beams makes it a pioneer in this topic. The experimental study consists of twenty RCHBs and four prismatic beams. Effects of important parameters including beam type, the inclination angle, flexure and compressive reinforcement, shear reinforcement on mechanical behavior and failure mode of each mode of RCHBs were examined in detail. Furthermore crack propagation at certain load levels were inspected and visualized for each RCHB mode. The results confirm that RCHBs have different behavior in shear as compared to the prismatic beams. At the same time, different mechanical behavior was observed between the modes of RCHBs. Therefore, RCHBs were classified into three modes according to the inclination shape and mode of failure (Modes A, B and C). However, it was observed that there is no significant difference between RCHBs and prismatic beams regarding flexural behavior. Moreover, a new and unified formula was proposed to predict the critical effective depth of all modes of RCHBs that is very useful to predict the critical section for failure.
机译：这项研究对钢筋混凝土横梁（RCHBs）的三种最常见模式进行了全面的实验研究。研究光束的多样性使其成为该主题的先驱。实验研究包括20条RCHB和4束棱镜光束。详细研究了梁类型，倾角，弯曲和抗压加固，抗剪加固等重要参数对RCHBs每种模式的力学性能和破坏模式的影响。此外，对于每种RCHB模式，都检查并可视化了在某些载荷水平下的裂纹扩展。结果证实，与棱形梁相比，RCHBs在剪切方面具有不同的行为。同时，在RCHBs模式之间观察到不同的机械性能。因此，RCHBs根据倾斜形状和破坏模式分为三种模式（模式A，B和C）。然而，观察到，RCHBs和棱柱梁在挠曲性能上没有显着差异。此外，提出了一个新的统一公式来预测所有模式的RCHB的临界有效深度，这对于预测失效的临界截面非常有用。

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