剪跨区开圆孔RC梁的破坏形态和初步试验研究

Failure models and an experimental study on reinforced concrete beam with a circular opening in the shear span

为了降低建筑层髙,在梁腹部开设孔洞供管线通过的方法在工程中已被逐步应用.但迄今仍缺乏对开大圆 孔 T 型 RC梁完善的设计方法及系统化、参数化的试验研究支持.文章介绍了腹部开设单个圆孔的钢筋混凝土梁的 几种较为典型的破坏形态,并对在剪跨区开大圆孔T 形 RC梁开展了初步的试验研究与分析.

In order to reduce the building height, the method of opening on a beam belly for pipeline has been gradually applied in the engineering. But the fact of lack of perfect design method and supports of systematical experimental researches on reinforced concrete beams with circular openings still existed. Several typical failure models of reinforced concrete with a single circular opening were introduced in this paper. A preliminary experi-mental study and analysis of T-shaped beams were also involved.