- 摘 要
-
（河南工業(yè)大學(xué)土木工程學(xué)院， 鄭州 450001）
［摘要］在分布式連接全裝配式RC樓蓋體系（DCPCD）中，板與板之間通過連接件連接以提高樓蓋的豎向承載力和平面內(nèi)剛度。為研究DCPCD的豎向承載力和變形特性，在試驗的基礎(chǔ)上基于正交各向異性彈性薄板小撓度理論，分析了四邊簡支條件下DCPCD的豎向承載性能和撓曲變形規(guī)律； 并以板縫數(shù)量、連接件數(shù)量和樓蓋跨度等為主要影響因素進(jìn)行了參數(shù)分析。分析結(jié)果表明：DCPCD具有較大的豎向承載力和剛度，樓蓋撓曲變形在順板向、橫板向基本一致，分布均勻且基本對稱，變形規(guī)律與雙向板樓蓋類似，說明DCPCD具有雙向板樓蓋的受力和變形特征； DCPCD撓度的計算值與試驗值吻合較好，驗證了理論計算方法的可行性。增加連接件、減少預(yù)制板數(shù)量可有效提高樓蓋豎向承載力和剛度，奇數(shù)預(yù)制板方案較偶數(shù)預(yù)制板方案有更大的豎向承載力和剛度，因此，在運輸和安裝等條件允許的情況下，建議采用寬板預(yù)制方案和奇數(shù)預(yù)制板結(jié)構(gòu)布置方案。
［關(guān)鍵詞］分布式連接； 全裝配式RC樓蓋； 板縫連接件； 橫板向彎曲剛度； 豎向承載性能
中圖分類號：TU375-2文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2020)20-0090-07
Analysis of vertical bearing capacity of four-sided simply supported precast RC floors
PANG Rui, DUAN Jinru, ZHANG Yibo, YANG Yijie
(College of Civil Engineering and Architecture, Henan University of Technology, Zhengzhou 450001, China)
Abstract:In the distributly connected precast RC floor diaphragm system(DCPCD), slab joints are connected by connectors to enhance the vertical bearing capacity and in-plane stiffness of DCPCD. The vertical bearing capacity and flexural deformation law of DCPCD under the condition of simple four-sided support were analyzed based on the experiment and the small deflection theory of elastic thin perpendicular heterogeneous slabs to study the vertical bearing capacity and deformation characteristics of DCPCD. In addition, parameter analysis was carried out with the main influencing factors such as the number of slab joints, the number of connectors and the slab span. The result shows that DCPCD has a large vertical bearing capacity and stiffness. The flexural deformation of the slab is basically the same in both slab laying direction (SLD) and orthogonal slab laying direction (OSLD), and the distribution is uniform and basically symmetrical, and the deformation law of DCPCD is similar to that of two-way slab, which indicates that DCPCD has the mechanism and deformation characteristics of two-way slab. The calculated value of DCPCD deflection is in good agreement with the experimental value, which verifies the feasibility of the theoretical calculation method. Adding connectors and reducing the number of precast slabs can effectively improve the vertical bearing capacity and stiffness of DCPCD. The odd number precast slabs scheme has greater vertical bearing capacity and stiffness than the even number precast slab scheme. Therefore, if the transportation and installation conditions permit, it is recommended to adopt the wide slab precast scheme and the odd precast slab structure layout scheme.
Keywords:distributed connection; precast RC floor; slab joint connector; transverse bending stiffness; vertical bearing capacity
*國家自然科學(xué)基金(51778214)，中原千人計劃支持項目（ZYQR201912170），河南省屬高?；究蒲袠I(yè)務(wù)專項基金（2017RCJHO4）。
作者簡介：龐瑞，博士，副教授，碩士生導(dǎo)師， Email：seupangrui@163.com。
