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（1 武漢理工大學(xué)土木工程與建筑學(xué)院，  武漢 430070； 2 美好建筑裝配科技有限公司， 武漢 430071）

 

［摘要］針對目前裝配式建筑中常用的鋼筋混凝土疊合樓板自重較大、工廠標(biāo)準(zhǔn)化生產(chǎn)的預(yù)制底板規(guī)格尺寸較小的問題，提出了一種由兩塊預(yù)制普通混凝土大板通過一條整體式接縫拼裝，并后澆輕質(zhì)頁巖陶?；炷炼傻拇箝_間疊合樓板，頁巖陶?；炷梁鬂矊涌捎行p小樓板自重，提高樓板的保溫、隔熱和隔聲性能。通過進行疊合板足尺試件的堆載試驗，研究其在豎向荷載作用下的承載力、變形特征、破壞形態(tài)及整體式接縫的傳力性能。結(jié)果表明，該大開間疊合板試件在正常使用極限狀態(tài)下的跨中撓度和裂縫寬度均滿足相關(guān)規(guī)范要求，且表現(xiàn)出明顯的雙向板裂縫分布特征，所采用的整體式接縫具有良好的傳力性能，可以作為結(jié)構(gòu)樓板使用。此外，有限元模型所選取的材料本構(gòu)模型和接觸面設(shè)定較為合理，計算結(jié)果與試驗結(jié)果吻合良好，可用于輕質(zhì)混凝土疊合樓板受力性能及影響參數(shù)分析。

［關(guān)鍵詞］頁巖陶?；炷?；  疊合板；  足尺試件；  堆載試驗；  有限元分析

中圖分類號：TU375-2文獻標(biāo)識碼：A文章編號：1002-848X(2021)02-0027-07

 

Fullscale experimental study on large-size and large-span shale ceramsite concrete two-way

 composite slab

ZHANG Yanbin1, GU Qian1, LEI Xiaotian1, KE Yang1, GUI Guan2

(1 School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China; 

2 Meihao Building Assembly Technology Co., Ltd., Wuhan 430071, China)

 

Abstract:In order to solve the problems of large self-weight of reinforced concrete composite floor slabs commonly used in prefabricated buildings and the small size of the prefabricated bottom plate produced by the factory standardization, a kind of large-span composite floor slab consisted of two prefabricated ordinary concrete slabs assembled through an integral joint and post-poured lightweight shale ceramsite concrete  was proposed. The post-pouring layer of shale ceramsite concrete can effectively reduce the self-weight of the floor slab and improve thermal insulation, heat insulation and sound insulation performance of the floor slab. The field surcharge test of  full-scale composite slab specimen  was carried out to study the bearing capacity, deformation characteristics, failure modes and the force transmission performance of integral joint under the action of vertical loads. The results show that mid-span deflection and crack width of the large-span composite slab specimen under serviceability limit state meet the requirements of the relative codes, crack distribution obviously in accordance with the characteristic of two-way slab. The integral joints used have good transmission performance and can be used as structural floor slabs. In addition, the material constitutive model and laminated surface setting selected by the finite element model are more reasonable, and the simulation results are in good agreement with the experimental results, the model can be used to analyze the mechanical performance and parameters analysis of lightweight concrete composite slabs.

 

Keywords:shale ceramsite concrete; composite slab; full-scale specimen; field surcharge test; finite element analysis