Title:
Static Experimental Behavior of Peripheral Composite Slab-Beam Joints
Author(s):
Yongzhi Gong, Yingjie Shan, Ping Xiang, Wei Huang, and Faxing Ding
Publication:
Structural Journal
Volume:
117
Issue:
4
Appears on pages(s):
255-265
Keywords:
beam-slab joint; mechanical property; peripheral composite slabs; thickness of slab; transverse superposed surface
DOI:
10.14359/51723525
Date:
7/1/2020
Abstract:
To improve the assembly rate of composite slabs, an innovative assembled peripheral composite slab is proposed in this paper. The static experimental behavior of beam-slab joints of this novel prefabricated assembly structure are investigated and compared with those of cast-in-place beam-slab joints. In this respect, five assembled composite beam-slab joints and one monolithic beam-slab joint were tested to study the effects of the laminated surface
type and the slab thickness on the mechanical properties of these joints, and the steel strain and load-deflection curve of the beam-slab joint were tested. It is observed that the mechanical properties of the non-ribbed composite slab are consistent with that of the cast-in-place slab. The transverse superposed surface has adverse effects on the flexural performance of composite slabs, and the location of this surface is one of the main factors that affect the ultimate bearing capacity of beam-slab joints. It is also found that the thickness of slabs has a great influence on the cracking load, ultimate bearing capacity, and the ductility coefficient of beam-slab joints. The folded steel bar reserved in the rib groove and the napping treatment of the composite surface can ensure the overall working performance of the joint. Setting ribs on precast slabs are helpful to improve the ductility coefficient of specimens, and this advantage is more obvious in specimens with small thickness.
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