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（天津城市建設(shè)學(xué)院土木工程學(xué)院，天津300384）

[摘要]  為了推廣應(yīng)用輕質(zhì)混凝土樓板，本文以一幢2層預(yù)制混凝土結(jié)構(gòu)實(shí)際工程為背景，通過足尺輕質(zhì)混凝土樓板開展了單調(diào)靜力荷載試驗(yàn)，對(duì)樓板的裂縫分布、破壞形態(tài)、位移延性等進(jìn)行了較系統(tǒng)的研究。試驗(yàn)結(jié)果表明輕質(zhì)混凝土樓板的破壞過程與普通混凝土梁的是一致的，具體表現(xiàn)為受拉鋼筋屈服后翼緣板頂部混凝土壓碎，呈彎曲破壞模式；輕質(zhì)混凝土樓板表現(xiàn)出較好的延性，其延性系數(shù)不小于8.5。研究成果可為輕質(zhì)混凝土樓板的推廣應(yīng)用提供技術(shù)依據(jù)。

[關(guān)鍵詞]  輕質(zhì)混凝土；樓板；破壞模式；延性

中圖分類號(hào)：TU375.2      文獻(xiàn)標(biāo)識(shí)碼：A      文章編號(hào)：1002-848X(2013)S1-1464-03

*國(guó)家自然科學(xué)基金項(xiàng)目(51208336)，住房和城鄉(xiāng)建設(shè)部研究開發(fā)項(xiàng)目(2011-K2-18)。 

作者簡(jiǎn)介：楊新磊，工學(xué)博士，副教授，Email:yxl2@live.cn。

Experimental studies on lightweight concrete slab under monotonic loading

Yang Xinlei, Wang Hailiang, Shang Jun, Ren Quanchang

(School of Civil Engineering, Tianjin Institute of Urban Construction, Tianjin 300384, China)

Abstract: In order to promote the use lightweight concrete slabs, a full-scale lightweight concrete slab, which was designed according to a two story prototype residential building, was tested under monotonic loading. Behavior of the test specimen was evaluated in terms of distribution of cracks, failure mode, ductility, etc. Test results showed that the failure process of the lightweight concrete slab was similar to that of the normal concrete slab, which was confirmed that the top concrete was crushed after the after tensile longitudinal reinforcement yielding, and the bending failure mode was observed; the test specimen performed in a ductile manner, and its value of ductility coefficient was not less than 8.5. The results are useful to expand the application of lightweight concrete slabs.

Keywords: lightweight concrete; slab; failure mode; ductility