双向受力的开槽混凝土叠合板力学性能试验研究  

Experimental study on the mechanical propertiesof two-way concrete composite slab with notches

作　　者：聂鑫[1,2] 庄亮东 李易凡 杨悦 Nie Xin;Zhuang Liangdong;Li Yifan;Yang Yue(Department of Civil Engineering,Tsinghua University,Beijing 100084,China;Key Laboratory of Civil Engineering Safety and Durability of Ministry of Education,Tsinghua University,Beijing 100084,China;Department of Civil Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]清华大学土木工程系,北京100084 [2]清华大学土木工程安全与耐久教育部重点实验室,北京100084 [3]北京航空航天大学土木工程系,北京100191

出　　处：《东南大学学报（自然科学版）》2024年第2期251-259,共9页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金原创探索资助项目(52250003)、国家自然科学基金资助项目(52222801)。

摘　　要：为了解决双向受力的叠合板拼缝处外伸的胡子筋容易与其他部件产生冲突从而影响施工的问题,采用了一种双向受力的开槽混凝土叠合板,在板件拼缝位置预留槽口,并在槽口处放置附加钢筋进行预制板之间的连接,共设置了3个试件对其力学性能进行试验研究.试验结果表明,双向受力的开槽混凝土叠合板与现浇混凝土板的承载力、刚度比分别达到0.99和1.08,延性系数达到9.59,且二者破坏形态一致,增加槽口数量对试件弹性刚度、开裂荷载、极限承载力的影响有限,但是可以提升叠合板的延性.双向受力的开槽混凝土叠合板可以实现拼缝处的有效传力,具有与现浇混凝土板一致的力学性能,在应用于实际工程时,可以提高施工效率、降低钢筋用量、提升经济效益,具有广阔的应用前景.To solve the problem that the extended reinforcement bars in the joint of two-way composite slab conflict with other components and affect construction,two-way concrete composite slab with notches was proposed.Notches were reserved in the joint and additional reinforcement bars were placed in the notches to connect the adjacent prefabricated slabs.Three specimens were designed to experimentally study the mechanical properties of the proposed slabs.The results show that the bearing capacity and stiffness ratio of the two-way concrete composite slab to the cast-in-place concrete slab are 0.99 and 1.08,respectively.The ductility coefficient of the two-way concrete composite slab reaches 9.59 and the failure modes of both are consistent with each other.Increasing the number of notches has little effect on the elastic stiffness,cracking load and ultimate strength of the specimen,but can improve the ductility of the composite slab.Two-way concrete composite slab with notches can effectively transfer the force between the prefabricated slabs and has mechanical properties consistent with the cast-in-place concrete slab.When applied to practical projects,the two-way concrete composite slab with notches can improve construction efficiency,reduce the usage of steel bars and increase economic performance,which has broad application prospects.

关 键 词：装配整体式结构 开槽混凝土叠合板 双向板 力学性能 设计方法 

分 类 号：TU398.9[建筑科学—结构工程]