H型钢加固混凝土板共同工作性能试验研究

Experimental study on common working performance of H-steel reinforced concrete slabs

为了研究后加H型钢加固混凝土板的共同工作性能,制作了12个二次成型H型钢加固混凝土板的试件,通过静力加载试验,研究了不同连接方式、植栓深度、锚栓数量(锚栓间距)及结合面的处理方式对于试件的工作性能以及破坏形态的影响。试验结果表明:通过采用植栓或穿过楼板设置螺栓连接件的方式,可使型钢梁与混凝土板具有一定的共同工作性能,形成组合梁;当采用植栓的方式进行连接时,植栓深度不小于锚栓直径的5倍,可保证锚栓不发生锚固破坏。结合面的粘贴处理方式对结合面产生滑移的荷载大小有影响,对试件的承载力没有影响;后加型钢加固混凝土板形成的组合构件并非完全意义上的组合梁,其承载力可按组合梁进行计算,但应将承载力乘以一个折减系数,建议取0.85;该组合构件的锚栓数量可参照钢结构设计规范对组合梁锚钉设置的要求进行设置,但应适当增加。

In order to study common working performance of H-steel reinforced concrete slabs, 12 post forming H-steel reinforced concrete slabs were made to carry out static loading. The influences of different connection way, plant bolts depth, the number of anchor bolts(anchor spacing) and the way of joint surface treatment were investigated. The test results show that by adopting the method of planting bolts or setting bolt connectors through the floor, the steel beam and the concrete slab can have a certain common working performance to form a composite beam. When using a plant bolt to connect, the depth of the plant bolt is not less than 5 times the diameter of the anchor bolt, which can ensure that the anchor bolt does not break. The bonding treatment method of the joint surface has an effect on the load of the slip surface, and has no influence on the bearing capacity. The composite member formed by the post-shaped steel reinforced concrete slab is not a composite beam in a complete sense, and its bearing capacity can be calculated according to the composite beam, but it should be multiplied by a coefficient. It is recommended to take 0.85. The number of anchors can refer to the setting requirements of the composite beam anchor according to standard for design of steel structures, but should be properly increased.