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为了研究不同植筋深度的钢筋混凝土梁受拉区的受力性能,采用植筋技术设计制作了3根钢筋混凝土植筋梁,植筋深度分别为15d,20d,25d(d为所植钢筋直径),并对其进行静载试验。静力试验结果表明:植筋梁的极限荷载随着植筋深度的增大而增大。在相同荷载作用下,植筋的应力随着测点到植筋端头距离的增大而增大,说明植筋端头所承担的应力较小,离端头的距离越大,钢筋所承担的应力越大。为充分发挥钢筋的强度,植筋深度应达到25d以上。
In order to study the mechanical behavior of reinforced concrete beams with different planting depths, three reinforced concrete anchorage beams were designed and produced using planting bar technology. The depths of planting bars were 15d, 20d and 25d, respectively ), And its static load test. The static test results show that the ultimate load of anchorage beam increases with the depth of anchorage reinforcement. Under the same load, the stress of planting bar increases with the distance from the measuring point to the tip of planting bar, which shows that the stress of anchorage end is smaller and the distance from the end is bigger, The greater the stress. In order to give full play to the strength of steel, planting depth should reach more than 25d.