scholarly journals Grillage Method Applied to the Planning of Ship Docking

2016 ◽  
Vol 2 (3) ◽  
pp. 150-157
Author(s):  
Sung Chan Kim ◽  
Cheolho Ryu ◽  
Jang Hyun Lee ◽  
Kyung Seok Lee
Keyword(s):  
Grillage Method

The Meticulous Analysis of Skew Beam Based on the Space Skew Beam Element Method

2014 ◽  
Vol 578-579 ◽  
pp. 220-224
Author(s):  
Xiang Feng Xu ◽  
Feng Zhang ◽  
Guang Zhi Qi
Keyword(s):  
Stiffness Matrix ◽  
Beam Element ◽  
Finite Element Models ◽  
Single Beam ◽  
Skew Bridge ◽  
Proposed Model ◽  
Minimum Potential ◽  
Space Beam Element ◽  
Beam Bridge ◽  
Grillage Method

When a skew bridge is analyzed, it is difficult to treat skew boundary conditions with general space beam element in single beam calculation of skew beam bridge. The stiffness of skew bridge cannot be simulated efficiently. In order to improve the accuracy of skew bridge, the stiffness matrix of the space skew beam element is derived based on the principle of minimum potential in this paper, this element is suitable for single beam of skew bridge and grillage method. A corresponding program is completed by Visual C++, the calculated results of different finite element models are compared, so the validity of the proposed model in this paper is validated. This paper can provide reference for plane and space calculation of the skew bridge design.

INFLUENCE OF SPAN LENGTH AND CROSSBEAM ON LOAD DISTRIBUTION FACTOR FOR GIRDER BRIDGES

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Hyo-Gyoung Kwak ◽  
Joungrae Kim
Keyword(s):  
Finite Element ◽  
Load Distribution ◽  
Span Length ◽  
Distribution Factor ◽  
Steel Girder ◽  
Girder Bridges ◽  
Load Distribution Factor ◽  
Exterior Girder ◽  
Grillage Method ◽  
Concrete Girder

Load distribution factor at concrete girder bridges and steel girder bridges are analyzed with finite element method to see effect of span length and cross beam to load distribution factor. Span lengths of analyzed bridge models are 30m, 40m, 50m and 60m. The number of intermediate cross beam is increased from one to until distance between cross beams becomes 5m. The finite element analysis results show that concrete girder and steel girder can use same load distribution factor and span length doesn’t affect to load distribution factor. Even though load distribution factor in interior girders is not influenced by cross beam, in exterior girders it is influenced by cross beam. Effect of cross beam in exterior girder is influenced by the number of lanes and distance from exterior girder to curb. Since design code introduces conservative load distribution factor, economically improved load distribution factor is proposed. The proposed load distribution factor includes cross beam effect with the number of lanes and distance from exterior girder to curb. The proposed equation is compared with AASHTO code and grillage method which is well-known method to calculate load distribution. The comparison results showed that the proposed equation is more efficient and useful than AASHTO and safer than the grillage method.

Y-Shape Bridge Analysis Based on Space Grillage Method

2007 ◽  
Author(s):  
Pengzhen Lu ◽  
Renda Zhao ◽  
Junping Zhang ◽  
Tianyu Xing
Keyword(s):  
Grillage Method

Automation of Parametric Modeling for Grillage Method

2013 ◽  
Vol 392 ◽  
pp. 210-213
Author(s):  
Shou Shan Cheng ◽  
Hai Xin Huang ◽  
Ying Zhang ◽  
Pei Chen
Keyword(s):  
Finite Element ◽  
Parametric Modeling ◽  
Text File ◽  
Finite Element Software ◽  
Main Girder ◽  
Grillage Method

For solving the problem of manually dividing section of main girder into grillages, a program is developed using VBA tool in AutoCAD environment, which can automatically search the divided position of grillage for section of single box with several rooms, and obtain characteristics of section of each grillage. Meanwhile calculational data can be stored as a text file, which is convenient to be directly called by commercial structural software. By comparing with the finite element software ANSYS, the reliability of the program and the accuracy of calculational results are verified. The program is ease to be amplified and transplanted owing to using the modularizational idea, and it greatly improves efficiency of setting up grillage model.

Application on Grillage Method in Box Girder Bridges

2013 ◽  
Vol 438-439 ◽  
pp. 886-890
Author(s):  
Jian Ping Feng ◽  
Xue Long Zhang ◽  
Zheng Zhu ◽  
Ping Ming Huang ◽  
Di Wang ◽  
...  
Keyword(s):  
Finite Element ◽  
Element Model ◽  
Plate Element ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Finite Element Software ◽  
Girder Bridges ◽  
Bridge Structures ◽  
Grillage Method

Grillage method was an effective method for analyzing bridge structures. In order to validate the grillage method met the requirements of engineering precision in calculation about box girder bridges, the grillage model and the plate element model of the bridge were built by using the finite element software Midas/Civil; under the premise of the same loading location and the load value, the deflection values and the stress values calculated from the two models were compared, and the corresponding error ranges were obtained. The results show that the differences between them meet the engineering accuracy and using the grillage method in box girder bridges is reasonable.

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