（1 筑友智造建設科技集團有限公司， 長沙 410000； 2 湘潭大學土木工程與力學學院， 湘潭 411105）

［摘要］結合現澆樓板與疊合樓板的優點，提出了一種新型預制整澆拼合樓板，為了研究該新型預制整澆拼合樓板的破壞形態、受彎性能、短期剛度，以板厚、配箍方式、預埋PVC數量等為變量設計了6個試件，并與2個現澆試件進行對比。通過對試件進行靜力加載試驗所得的荷載-位移曲線及板內箍筋應變變化情況的分析，表明：新型預制整澆拼合樓板較現澆樓板具有更高的承載力；拼合樓板的現澆部分配置環箍的受力性能比配置開口箍+底筋以及雙折開口箍的受力性能更佳；拼合樓板現澆部位埋置PVC管會降低其承載力和剛度；拼合樓板在拼縫處存在一個薄弱面，應增加此處的構造措施。

［關鍵詞］預制樓板；拼合樓板；裝配式樓板；靜力試驗；受彎性能； 短期剛度

中圖分類號：TU375-2文獻標識碼：A文章編號：1002-848X(2021)05-0092-06

Experimental study on flexural performance of new type of precast cast-in-situ composite floor slab

LIAO Zhiqiang1, NI Jiagui2, YU Dayou 1, CHEN Jun2, LIAO Zhenying1, CHEN Fuliang 1

(1 DIT Group Limited, Changsha 410000, China;  2 College of Civil Engineering and Mechanics， Xiangtan University, Xiangtan 411105, China)

Abstract:Combining the advantages of cast-in-situ floor slab and laminated floor slab, a new type of precast cast-in-situ composite floor slab was proposed. In order to study the failure mode, flexural performance and short-term stiffness of the new type of precast cast-in-situ composite floor slab, six specimens were designed based on variables such as the thickness, stirrup reinforcement method, and the number of embedded PVC pipes, and which were compared with two cast-in-place specimens. The analysis of the load-displacement curve obtained by the static loading test on the specimens and the strain change of the stirrup in the slab shows that:  the new type of precast cast-in-situ composite floor slab has a higher bearing capacity than that of the cast-in-place floor slab; the mechanical performance of the cast-in-place part of the composite floor slab with ring stirrup is better than that with opening stirrup + bottom reinforcement bar and double folding opening stirrup; the bearing capacity and stiffness will be reduced if PVC pipes are embedded in the cast-in-place part of the composite floor slab; there is a weak surface in the joint of the composite floor slab, and the structural measures should be added.

Keywords:precast slab;composite slab;prefabricated slab;static test;flexural performance; short-term stiffness

*湖南省自然科學基金(2019JJ60047)， 湖南省重點研發(2018WK2110,2018WK2111)， 湖南省科技專項 (2017XK2048)，“科技助力經濟2020”重點專項（SQ2020YFF0426587）。

作者簡介：廖智強，博士，高級工程師, Email： liaozhiqiang77@163.com；通信作者：陳甫亮，碩士，工程師，一級建造師，Email:1019549361@qq.com。