预埋管线布置对叠合板承载性能影响试验研究

Experimental study on the influence of embedded pipeline placement on the bearing performance of laminated slab

为了研究在装配式结构叠合板的叠合层中管线布置形式对叠合板承载性能的影响,在叠合层里设计了3组不同方向预埋管线和1组没有预埋管线的叠合板进行对比加载试验,对4组试件的承载力、跨中荷载-挠度曲线及混凝土、钢筋的荷载–应变曲线进行了对比分析,并利用ABAQUS对不同管线布置形式下的叠合板承载性能进行了数值模拟分析。研究结果表明:叠合层中预埋管线对叠合板的承载能力有较大影响,垂直于板跨方向埋设管线对叠合板承载能力影响最大,斜向设管次之,沿板跨方向埋设管线影响最小,且当管线埋设高度距受压区边缘较远时对叠合板承载能力影响较小。

To investigate the effect of the pipeline placement form on the bearing performance of laminated plates in the laminated layer of fabricated structural laminated plates, three sets of stacks with pipelines arranged in different directions of the stacks and one set of stacks without pipeline placement were designed for comparative loading tests.Based on the test data, the load-bearing forces, cross medium load deflection curves and the load-strain curves of concrete and rebar were comparatively analyzed in four groups. Combined with the test results, ABAQUS was used to numerically simulate and computationally analyze the superimposed plates under different pipeline placement forms. The results of this study show that the placement of pipelines in the stacks has a large effect on the load-bearing capacity of the stacks, the tube set perpendicular to the plate across direction has the greatest effect on the loading capacity of the stack plate, the oblique set second, and the tube set along the plate across direction has the least effect. Moreover, buried pipe lines have less influence on the load-bearing capacity of the laminated plate when their height is far from the edge of the compression zone.