Investigation on probability model of bending moment-rotation relationship for bolt-ball joints

IF 4 2区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Journal of Constructional Steel Research Pub Date : 2024-11-29 DOI:10.1016/j.jcsr.2024.109193
Bing-Bing San , Shi-Zhuo Xu , Zhi-Wei Shan , Wei Chen , Daniel Ting-Wee Looi
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引用次数: 0

Abstract

As a representative semi-rigid connection, accurately predicting the mechanical properties of bolt-ball joints is of significant importance for structural design. The impact of axial load should be considered in the derivation for the initial stiffness of bolt-ball joints and its bending moment capacity. Because of the variability of geometric dimension and stochastic mechanical property of material, there is a degree of randomness in the actual mechanical behavior of the joints. In order to quantify the randomness in the bending performance, theoretical study was first carried out for the initial stiffness and bending moment capacity of the joint considering effects of axial load, which can accurately predict the bending mechanical performance of bolt-ball joints. Furthermore, the Monte Carlo method was utilized to study the impact of uncertainties in material mechanical properties, joint geometric dimensions, and assembly tightness on the bending performance. Utilizing the Latin Hypercube Sampling (LHS) methodology, a dataset comprising 10,000 samples were systematically extracted for each of the five distinct sizes of bolt-ball joints, and their stochastic responses for initial stiffness and bending moment capacity were obtained using Matlab software. Moreover, the additional variability in initial stiffness and bending moment capacity due to model uncertainty was considered and quantified. By combining the randomness of initial stiffness and bending moment capacity with the additional variability, a three-parameter power function model with random parameters was developed to establish a probabilistic model for the bending moment-rotation relationship of bolt-ball joints.
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来源期刊
Journal of Constructional Steel Research
Journal of Constructional Steel Research 工程技术-工程:土木
CiteScore
7.90
自引率
19.50%
发文量
550
审稿时长
46 days
期刊介绍: The Journal of Constructional Steel Research provides an international forum for the presentation and discussion of the latest developments in structural steel research and their applications. It is aimed not only at researchers but also at those likely to be most affected by research results, i.e. designers and fabricators. Original papers of a high standard dealing with all aspects of steel research including theoretical and experimental research on elements, assemblages, connection and material properties are considered for publication.
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