|Table of Contents|

Experimental on New Type of Two-way Composite Floor Slab with Recycling Truss Ribs(PDF)

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

Issue:
2020年02期
Page:
27-34
Research Field:
Publishing date:

Info

Title:
Experimental on New Type of Two-way Composite Floor Slab with Recycling Truss Ribs
Author(s):
WU Fang-bo1;  LI Bo1;  WEN Jun1;  QIN Hao2;  ZHOU Xu-hong1; 2
(1. College of Civil Engineering, Hunan University, Changsha 410082, Hunan, China; 2. School of Civil Engineering, Chongqing University, Chongqing 400044, China)
Keywords:
composite floor slab;  mechanical property;  static load test;  deflection;  construction phase;  use phase
PACS:
TU973.2
DOI:
10.19815/j.jace.2019.02040
Abstract:
In order to study the mechanical property of new type of two way composite floor with recycling truss ribs, the static load tests of two new composite bidirectional plates with different reinforcements and one cast-in-place bidirectional plate were carried out. The simulated loading test was carried out for the new type of composite bidirectional slab in the construction stage. The deflection of prefabricated slab under construction load was tested without support. The basic mechanical properties such as crack distribution, failure mode, stiffness change, deflection, cracking load, bending capacity and overall working performance were compared and analyzed. The results show that the deflection limit of prefabricated slab in construction stage meets the requirements of specifications. The truss ribs play a supporting role in the construction stage of the new composite bidirectional slab, and the truss ribs bear the construction load. The crack distribution, failure mode and bearing capacity of the new composite bidirectional slab and the cast-in-place bidirectional slab are basically the same, and the cracking load is earlier than that of the cast-in-place bidirectional slab. Compared with the cast-in-place bidirectional slab, the existence of laminated layer and embedded parts in the new composite bidirectional slab weakens the integrity of the slab to some extent, but the influence is relatively small. In the case that the area of reinforcement is basically the same, the use of fine reinforcement in the prefabricated plate can improve the anti-cracking performance of the composite bi-directional plate. In the use stage, the structure measures of the natural rough surface can ensure the shear resistance of the composite surface. In the elastic stress stage, the precast plate and the post-cast layer can work together and have good integrity.

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Last Update: 2020-04-21