LIVE LOAD FOR COLUMN DESIGN CONSIDERING OCCURRENCE PROBABILITY OF FURNITURE CONCENTRATION

An important problem facing engineers and officials in the United States is the constraint imposed on transportation due to limitations of bridges. These limitations typically constrain vehicles to minimum heights and widths, to minimum and maximum lengths, and to a maximum allowable weight. However, with current demands of society and industry, there are times when a truck must carry a load that exceeds the size and weight of the legal limit. In this situation, the trucking company requests from the state departments of transportation an overload permit. For a truck with a wheel gauge larger than 1.8 m (6 ft), the process of issuing a permit for an overload truck requires a tremendous amount of engineering efforts. This is because the wheel load girder distribution factors (GDFs) in the design specifications cannot be used to estimate the live-load effect in the girders. In some cases, an expensive and time-consuming finite element analysis may be needed to check the safety of the structure. In this study, the finite element method is used to develop a modification factor for the GDF in AASHTO’s LRFD Bridge Design Specifications to account for oversized trucks with a wheel gauge larger than 1.8 m. To develop this factor, nine bridges were considered with various numbers of girders, span lengths, girder spacings, and deck slab thicknesses. The results indicated that use of the proposed modification factor with the GDF in the design specifications can help increase the allowable load on slab-on-girder bridges.

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Co-occurrence probability of typhoon surges affecting multiple estuaries in the northern coastal region of Taiwan

Regional Studies in Marine Science ◽

10.1016/j.rsma.2020.101582 ◽

2020 ◽

pp. 101582

Author(s):

Jinjin Zhai ◽

Qilin Yin ◽

Sheng Dong

Keyword(s):

Coastal Region ◽

Occurrence Probability

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Field Determined Live Load Distribution Factors for Modular Press-Brake-Formed Tub Girders

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198120983757 ◽

2021 ◽

pp. 036119812098375

Author(s):

Karl E. Barth ◽

Gregory K. Michaelson ◽

Adam D. Roh ◽

Robert M. Tennant

Keyword(s):

West Virginia ◽

Experimental Testing ◽

Field Performance ◽

Live Load ◽

Steel Bridge ◽

Testing Procedures ◽

Bending Capacity ◽

Short Span ◽

And Performance ◽

Live Load Distribution

This paper is focused on the field performance of a modular press-brake-formed tub girder (PBFTG) system in short span bridge applications. The scope of this project to conduct a live load field test on West Virginia State Project no. S322-37-3.29 00, a bridge utilizing PBFTGs located near Ranger, West Virginia. The modular PBFTG is a shallow trapezoidal box girder cold-formed using press-brakes from standard mill plate widths and thicknesses. A technical working group within the Steel Market Development Institute’s Short Span Steel Bridge Alliance, led by the current authors, was charged with the development of this concept. Research of PBFTGs has included analyzing the flexural bending capacity using experimental testing and analytical methods. This paper presents the experimental testing procedures and performance of a composite PBFTG bridge.

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Multi-sensor Complex Network Data Fusion Under the Condition of Uncertainty of Coupling Occurrence Probability

IEEE Sensors Journal ◽

10.1109/jsen.2021.3061437 ◽

2021 ◽

pp. 1-1

Author(s):

Xianfeng Li ◽

Sen Xu

Keyword(s):

Data Fusion ◽

Complex Network ◽

Network Data ◽

Occurrence Probability

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Reliability Analysis of Prestressed Concrete Bridges in Mexico: Assessment and Live Load Factors Proposal

International Journal of Civil Engineering ◽

10.1007/s40999-020-00590-9 ◽

2021 ◽

Author(s):

Rolando Salgado-Estrada ◽

Sergio A. Zamora-Castro ◽

Agustín L. Herrera-May ◽

Yessica A. Sánchez-Moreno ◽

Yair S. Sánchez-Moreno

Keyword(s):

Reliability Analysis ◽

Prestressed Concrete ◽

Concrete Bridges ◽

Live Load ◽

Prestressed Concrete Bridges ◽

Load Factors

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Interval-Valued Probabilistic Hesitant Fuzzy Set Based Muirhead Mean for Multi-Attribute Group Decision-Making

Mathematics ◽

10.3390/math7040342 ◽

2019 ◽

Vol 7 (4) ◽

pp. 342 ◽

Cited By ~ 6

Author(s):

Krishankumar ◽

Ravichandran ◽

Ahmed ◽

Kar ◽

Peng

Keyword(s):

Decision Making ◽

Group Decision Making ◽

Fuzzy Set ◽

Group Decision ◽

Partial Information ◽

Programming Model ◽

Hesitant Fuzzy Set ◽

Occurrence Probability ◽

Source Selection ◽

Interval Valued

As a powerful generalization to fuzzy set, hesitant fuzzy set (HFS) was introduced, which provided multiple possible membership values to be associated with a specific instance. But HFS did not consider occurrence probability values, and to circumvent the issue, probabilistic HFS (PHFS) was introduced, which associates an occurrence probability value with each hesitant fuzzy element (HFE). Providing such a precise probability value is an open challenge and as a generalization to PHFS, interval-valued PHFS (IVPHFS) was proposed. IVPHFS provided flexibility to decision makers (DMs) by associating a range of values as an occurrence probability for each HFE. To enrich the usefulness of IVPHFS in multi-attribute group decision-making (MAGDM), in this paper, we extend the Muirhead mean (MM) operator to IVPHFS for aggregating preferences. The MM operator is a generalized operator that can effectively capture the interrelationship between multiple attributes. Some properties of the proposed operator are also discussed. Then, a new programming model is proposed for calculating the weights of attributes using DMs’ partial information. Later, a systematic procedure is presented for MAGDM with the proposed operator and the practical use of the operator is demonstrated by using a renewable energy source selection problem. Finally, the strengths and weaknesses of the proposal are discussed in comparison with other methods.

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