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

作　　者：王建烁 王腾 陈志华 甘威[1,2] 陶红斌 任伟 WANG Jianshuo;WANG Teng;CHEN Zhihua;GAN Wei;TAO Hongbin;REN Wei(School of Civil Engineering,Tianjin Chengjian University,Tianjin 300384,China;Tianjin Key laboratory of Civil Structure Protection and Reinforcement,Tianjin 300384,China;School of Civil Engineering,Tianjin University,Tianjin 300072,China;Duowei Union Group Co.,Ltd.,Beijing 100070,China;Key Laboratory of Transport of Industry of Bridge Detection Reinforcement Technology,Chang’an University,Xi’an 710064,China)

机构地区：[1]天津城建大学土木工程学院,天津300384 [2]天津市土木建筑结构防护与加固重点实验室,天津300384 [3]天津大学建筑工程学院,天津300072 [4]多维联合集团有限公司,北京100070 [5]长安大学旧桥检测与加固技术交通运输行业重点实验室,西安710064

出　　处：《建筑钢结构进展》2025年第4期118-130,共13页Progress in Steel Building Structures

基　　金：国家自然科学基金(52408204);天津自然科学基金青年项目(23JCQNJC00410);长安大学中央高校基本科研业务费专项资金资助项目(300102213519)。

摘　　要：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3600 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 3600 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.

关 键 词：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 

分 类 号：TU398.9[建筑科学—结构工程]