|Table of Contents|

Mechanical Properties Test of New Type of Laminated Slab(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2020年01期
Page:
33-40
Research Field:
Publishing date:

Info

Title:
Mechanical Properties Test of New Type of Laminated Slab
Author(s):
WU Fang-bo1;  QIN Hao1;  WEN Jun1;  LI Bo1;  ZHOU Xu-hong1; 2
(1. College of Civil Engineering, Hunan University, Changsha 410082, Hunan, China; 2. School of Civil Engineering, Chongqing University, Chongqing 400045, China)
Keywords:
laminated slab;  mechanical property;  four-point loading;  deflection;  bearing capacity
PACS:
TU311
DOI:
10.19815/j.jace.2019.02026
Abstract:
In order to analyze the performance of laminated slab in service, such as deflection, stress-strain curve of steel bars, the static loading test of a cast-in-place slab and a new type of laminated slab was carried out. In the test, the large reaction frame, a hydraulic jack and a two-stage distribution beam were used as loading tools for four-point loading on the composite simply supported slab with detachable truss and the cast-in-place simply supported slab to simulate the stress state of the slab under uniform load, and the test data were compared. The results show that the deflection of the laminated slab meets the requirements of the use stage, and the ductility is good. At the end of the final loading, the cracks of the laminated slab is similar to the cast-in-place two-way slab. The cracks at the bottom of the slab first appear below the four loading points, and with the subsequent loading from four loading points to four corners of the laminated slab. The appearance of cracks indicates that the tensile properties of steel bars are fully utilized when the laminated slab are damaged. After the last stage of loading, the concrete on the top of the laminated slab is not crushed, this indicates that the laminated slab still has the capacity of continuous bearing. The bonding performance between the embedded parts and concrete is good, and the concrete around the embedded parts is not damaged in a large area. Several vertical cracks are found on the side of the component, and no transverse cracks are found on the laminated surface, which shows that the surface scratching can meet the shear requirements of the laminated surface.

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Last Update: 2020-01-13