EXPERIMENTAL RESEARCH AND THEORETICAL ANALYSIS OF SHORT-TERM STIFFNESS OF FILIGREE SLABS

WANG Binglun; ZHANG Yaoting; TAO Jinyou; JIN Xing; YANG Jie

doi:10.13204/j.gyjzG21012704

Volume 51 Issue 11

Mar. 2022

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WANG Binglun, ZHANG Yaoting, TAO Jinyou, JIN Xing, YANG Jie. EXPERIMENTAL RESEARCH AND THEORETICAL ANALYSIS OF SHORT-TERM STIFFNESS OF FILIGREE SLABS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(11): 67-74,99. doi: 10.13204/j.gyjzG21012704

Citation:

WANG Binglun, ZHANG Yaoting, TAO Jinyou, JIN Xing, YANG Jie. EXPERIMENTAL RESEARCH AND THEORETICAL ANALYSIS OF SHORT-TERM STIFFNESS OF FILIGREE SLABS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(11): 67-74,99. doi: 10.13204/j.gyjzG21012704

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EXPERIMENTAL RESEARCH AND THEORETICAL ANALYSIS OF SHORT-TERM STIFFNESS OF FILIGREE SLABS

doi: 10.13204/j.gyjzG21012704

1. School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;
2. Hubei Baoye Building Industrialization Enterprise, Wuhan 403070, China

Received Date: 2021-01-27
Available Online: 2022-03-29

Abstract

Abstract

In the calculation of short-term stiffness of filigree slabs in composite slabs with lattice girders, the reasonable consideration of the contribution of lattice girder's stiffness to filigree slabs is directly related to the checking computations in the short-term design conditions. Three full-scale filigree slabs were designed according to Technical Specification for Precast Concsete Structceres(JGJ 1—2014), including two filigree slabs in thickness of 50 mm and one filigree slab in thickness of 60 mm, with length and width dimensions of 3 300 mm and 2 200 mm. The test and the analysis results showed that the bare top bars participated in bearing construction loads, but their role was limited. The reason was that the mechanical properties of the bare part of lattice girders were different from the part of bars embedded in slabs, which led to the larger stiffness of filigree slabs calculated by the method of equal modulus of elasticity. Based on the analysis and comparison of the test results, when the equal elastic modulus was used to calculate the total stiffness of filigree slabs, the section stiffness of the lattice girders by inverse calculations should be reduced. Then, a reduction factor of 0.6 was proposed.
- lattice girder,
- short-term stiffness,
- composite slab,
- deflection,
- flexural property

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References(23)

References

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