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饱水状态下PFCB-钢筋桁架楼承板施工阶段力学性能研究
王建烁, 王腾, 陈志华, 甘威, 陶红斌, 任伟
PDF(4897 KB)
PDF(4897 KB)
饱水状态下PFCB-钢筋桁架楼承板施工阶段力学性能研究
Mechanical Properties of PFCB-Steel-Bars Truss Deck in the Construction Stage Under Water-Saturated Condition
提出了一种新型免拆模钢筋桁架楼承板（PFCB-钢筋桁架楼承板），该楼承板由钢筋桁架和纤维水泥底板通过自攻螺钉和连接件预制连接而成。为研究PFCB-钢筋桁架楼承板在施工阶段的受力性能，并考虑施工时混凝土砂浆中水分或降水天气对纤维水泥板底模的影响，对PFCB-钢筋桁架楼承板进行了饱水状态下的承压能力试验。采用有限元软件对楼承板结构进行了参数化分析，得到了楼承板极限承载力与刚度的变化规律，发现PFCB-钢筋桁架楼承板在均布设计组合荷载以及集中荷载下性能良好，极限荷载下跨度为 3 600 mm试件的挠度控制在6~8 mm；改变自攻螺钉间距与钢筋桁架高度对试件的承载力影响比较显著。
This paper proposes a new type of steel-bars truss deck with permanent bottom form （PFCB-steel-bars truss deck）， which is an assembled floor deck consisting of steel-bars truss and permanent fiber cement bottom （PFCB） prefabricated with self-tapping screws and connectors. In order to study the structural performance of PFCB-steel-bars truss deck in the construction stage and to consider the influence of moisture in concrete mortar or precipitation weather on fiber cement bottom form during construction， a compressive capacity test of PFCB-steel-bars truss deck was conducted under water-saturated condition. A parametric analysis of the steel-bars truss deck structure was carried out using finite element software simulation， and the change rule of ultimate bearing capacity and stiffness was obtained. The results demonstrate that the PFCB-steel-bars truss deck has good performance under uniform design combination load and concentrated load， and the deflection of the specimens with a span of 3 600 mm is controlled to be between 6-8 mm under the ultimate load. Moreover， the change of the self-tapping screws spacing and the height of the steel trusses has a more obvious effect on the load bearing capacity of specimens.
纤维水泥底板 / 钢筋桁架楼承板 / 饱水状态 / 用钢量 / 参数化分析
permanent fiber cement bottom（PFCB） / steel-bars truss deck / water-saturated condition / steel consumption / parametric analysis
TU398+.9
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