配筋砌块砌体桥墩大偏心受压试验分析

Large Eccentric Compression Test of Reinforced Concrete Masonry Piers

采用配筋空心砌块砌体结构制作模型桥墩,研究了配筋空心砌块砌体桥墩在大偏心受压状态下的破坏形态、承载能力和变形能力。研究表明:配筋空心砌块桥墩在大偏压作用下具有较好的承载能力,开裂位置大部分集中出现在墩身水平灰缝位置处;砌块与钢筋之间具有良好的黏接力和协同工作性能,其变形与钢筋混凝土构件类似;桥墩受拉侧发生开裂与钢筋屈服,受压侧发生砌体压碎剥落,没有出现脆性破坏和局部破坏,与钢筋混凝土构件偏压破坏现象十分相似。

The reinforced hollow block masonry structure was used to make pier models,and the failure mode,bearing and deformation capacity of the pier models under large eccentric compression were studied. Studies show that reinforced hollow block pier has a better bearing capacity under the action of large bias,and the crack location mostly appears at the shafts of horizontal mortar joint location; there are good adhesive strength and cooperative working performance between block and steel,whose deformation is similar to the one of reinforced concrete member; the tension side of the bridge pier appears crack and steel yield,and the pressure side has masonry crushed flake without brittle failure and local failure,which is very similar to the bias damage of reinforced concrete member.