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RESEARCH PAPERS

# Strength and Buoyancy Analyses of Floating Roof With Continuous Beams and Dome Frames Under Rainwater Loading

[+] Author and Article Information
Xiushan Sun

Department of Engineering Mechanics, Tsinghua University, Beijing 100084, People’s Republic of Chinasxs@tsinghua.edu.cn

Yinghua Liu1

Department of Engineering Mechanics, Tsinghua University, Beijing 100084, People’s Republic of Chinayhliu@tsinghua.edu.cn

Zhangzhi Cen

Department of Engineering Mechanics, Tsinghua University, Beijing 100084, People’s Republic of Chinademczz@tsinghua.edu.cn

Shutian Lin

Department of Engineering Mechanics, Tsinghua University, Beijing 100084, People’s Republic of Chinademlst@tsinghua.edu.cn

1

Corresponding author.

J. Pressure Vessel Technol 129(1), 73-82 (Mar 27, 2006) (10 pages) doi:10.1115/1.2389007 History: Received December 19, 2005; Revised March 27, 2006

## Abstract

In this paper, the strength and buoyancy problems of the floating roof with continuous beams and dome frames are analyzed by the finite element method (FEM) and model experiment method. The modified-loading method with relationship between deflection and load is developed to carry out the FEM analysis of the floating roof under rainwater loading, and a model experiment is also configured to prove the reasonability of the numerical method and to assist the analysis. The deflections, strains, and sinking problems of the floating roof with continuous beams and dome frames are simulated by the present FEM and tested by the experiment, respectively. The floating roof without beams, ribs, or frames is also simulated by the present FEM. The numerical results are compared to the corresponding experimental ones. According to these results, the problems of strength and buoyancy of the floating roof with continuous beams and dome frames are also investigated and discussed. These results will provide some available references to designs and studies in the industry.

## Figures

Figure 1

Sketch of the floating roof with continuous beams and dome frames

Figure 2

Dimension illustration of the floating roof

Figure 3

Figure 4

Deflection and water heights of the floating roof

Figure 5

Figure 6

FE model of the floating roof with continuous beams and dome frames: (a) An eighteenth structure model for strength analysis and (b) Continuous beams and ribs in the eighteenth structure

Figure 7

Experiment model and test equipments

Figure 8

Staff gage locations for deflection measurement

Figure 9

Strain gage configurations and leading wires in the compartment for test

Figure 10

Deflection of the deck under h0=50mm

Figure 11

Maximum deflections of the deck under different rainfalls

Figure 12

Comparison of deflection of the deck for roofs with and without beams (h0=50mm)

Figure 13

Comparison of maximum deflection of the deck for roofs with and without beams under different rainfalls

Figure 14

Figure 15

Tangential strain in the deck

Figure 16

Comparison of radial strain in the deck for roofs with and without beams

Figure 17

Comparison of tangential strain in the deck for roofs with and without beams

Figure 18

Tangential strain in the inner rim

Figure 19

Vertical strain in the inner rim

Figure 20

Comparison of tangential strain in the inner rim for roofs with and without beams

Figure 21

Comparison of vertical strain in the inner rim for roofs with and without beams

Figure 22

Radial strain in the bottom plate

Figure 23

Tangential strain in the bottom plate

Figure 24

Comparison of radial strain in the bottom plate for roofs with and without beams

Figure 25

Comparison of tangential strain in the bottom plate for roofs with and without beams

Figure 26

Uniaxial strain in the bottom continuous radial beams

Figure 27

Uniaxial strain in the bottom continuous annulus beams

Figure 28

Uniaxial strain in the upright rib

Figure 29

Water heights under different rainfalls

Figure 30

Sinking heights under different rainfalls

Figure 31

Comparison of water heights for the roofs with and without beams under different rainfalls

Figure 32

Comparison of sinking heights for the roofs with and without beams under different rainfalls

Figure 33

Test for deck and two adjacent compartments punctured

## Errata

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