Aug 2026· Engineering Reports· Vol 8· 0 citations· 25 references
Abstract
Steel truss bridge nodes are prone to fatigue damage under long‐term cyclic loads due to their complex connection forms and significant stress concentrations, which may compromise the service safety of steel bridges. This study develops a three‐dimensional nonlinear refined finite element model for typical bolted and welded nodes, considering the effects of bolt pretension, weld toe geometry, and contact nonlinearity, thereby achieving a unified simulation of local node details and overall structural response. By analyzing the stress range, frequency, and evolution of key detail components, the fatigue‐critical regions and governing mechanisms of both bolted and welded nodes are identified, and the contribution of each component along complex stress paths is clarified. Based on these findings, a fatigue life prediction method applicable to both bolted and welded nodes is proposed, which effectively reflects the actual stress characteristics and fatigue damage evolution of the nodes. The results provide theoretical guidance and technical reference for fatigue safety assessment and durability design of steel truss bridges.
Reliable fatigue design of welded components under multiaxial loading demands local criteria able to capture both the stress gradient at the weld notches and the influence of a complex loading condition including non proportionality of the stress‐strain load history. The Effective Critical Plane (ECP) approach, bas...
A. Chiocca, F. Frendo· Fatigue & Fracture of En...· 0 citations
To accurately predict the tensile fatigue life of reinforced thermoplastic pipes (RTPs) and clarify the mechanism of fatigue damage evolution, this research proposes a multiscale analytical model based on continuum damage mechanics (CDM). Built upon the three‐dimensional constitutive relations of RTPs and the load–de...
Chen Zhang, Mingyang Lou, Yang-Yang Wang et al.· Polymer Composites· 0 citations
This study investigates the hotspot stress concentration characteristics of rectangular concrete-filled steel tube (CFST) truss joints under bridge deck composite action. Two truss specimens, with and without a reinforced concrete deck, were tested under midspan vertical loading. Nominal stresses and hotspot stresses w...
Li-Yong Gao, Yi Shi, Pei-Yuan Liu et al.· Buildings· 0 citations
The study explored a fatigue life prediction framework incorporating an experimentally derived calibration approach for composite–steel hybrid single-lap joints. Since the overlap length of hybrid joints governs the load transfer path, stress distribution, and adhesive-bolt load sharing, it is known as one of the mos...
Heechan Song, H. An, Young Bin Kim et al.· Journal of Structural Engine...· 0 citations
This paper presents results of new fatigue tests on bearing type connections where the material strength of the component, the geometrical dimensions of the components (double covered symmetrical joint with variation of end and edge distances), surface condition (hot‐dip galvanisation and blast cleaning) and hole manuf...
F. Kalkowsky, R. Glienke, Markus Schröder et al.· ce/papers· 0 citations
The growing expansion of offshore wind energy requires more accurate assessment strategies for fatigue life of welded joints. T‐Joints are a frequently structural detail in monopile‐based offshore foundations, for example at boat landings and secondary steel attachments. During global tower bending due to wind loading...
S. Vogts, Julian Unglaub, K. Thiele· ce/papers· 0 citations
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