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钢筋桁架发泡混凝土复合板受弯性能试验研究*
刘治中1,郭耀杰1,吴东平2,陈颢元1,李旋1
摘 要

(1 武汉大学土木建筑工程学院, 武汉 430072; 2 武汉科技大学城市建设学院, 武汉 430065)

[摘要]结合当前国内外装配式住宅楼板体系的发展趋势,提出一种新型的钢筋桁架发泡混凝土复合板结构。为研究钢筋桁架发泡混凝土复合板的受弯性能,进行了3个复合板试件受弯试验。分析了各试件的破坏特征、荷载与应变、挠度关系以及开裂荷载、屈服荷载、极限荷载。研究表明,钢筋桁架发泡混凝土复合板呈现典型的受弯构件受力特征,其钢筋桁架能有效约束混凝土板裂缝的开展,提高混凝土板的后期刚度。通过理论推导,得出了钢筋桁架发泡混凝土复合板开裂弯矩、极限弯矩、挠度以及裂缝宽度计算公式,计算结果与试验值相对误差较小。

[关键词]钢筋桁架; 发泡混凝土; 复合板; 受弯性能; 试验研究

中图分类号:TU375-2文献标识码:A文章编号:1002-848X(2018)24-0091-06

 

Experimental research on flexural performance of composite slabs with foamed concrete and steel bar truss

Liu Zhizhong1, Guo Yaojie1, Wu Dongping2, Chen Haoyuan1, Li Xuan1

(1 School of Civil Engineering and Architecture, Wuhan University, Wuhan 430072, China; 2 School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China)

Abstract:Combined with the current development trend of fabricated residential floor slab system at home and abroad, a new type of composite slab structure with foamed concrete and steel bar truss was proposed. In order to study the flexural performance of composite slabs with foamed concrete and steel bar truss, three composite plate specimens were subjected to flexural test. The failure characteristics, load and strain, deflection relationship, cracking load, yield load and ultimate load of each test specimen were analyzed. The research shows that the composite slab with foamed concrete and steel bar truss exhibits the typical mechanical characteristics of the flexural members and the steel bar truss can effectively restrain the cracks of the concrete slab and improve the late stiffness of the concrete slab. Through the theoretical derivation, the calculation formulas of cracking moment, ultimate flexural moment, deflection and crack width of composite slab with foamed concrete and steel bar truss were obtained. The relative error between the calculated results and the experimental values was small.

Keywords:steel bar truss; foamed concrete; composite slab; flexural performance; experimental research

 

*国家自然科学基金项目(51378401),中央高校基本科研业务费专项资金项目(2042016kf1126)。

 

作者简介:刘治中,硕士研究生,Email:18271391338@163.com。

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