Structural state of stress analysis of concrete‐filled stainless steel tubular short columns

Abstract

Analyse der statischen Spannungszustände von kurzen betongefüllten Rundstützen aus Edelstahl. Unter Anwendung der Theorie der statischen Spannungszustände werden im vorliegenden Beitrag die experimentellen Untersuchungen zum Arbeitsverhalten kurzer betongefüllter Rundstützen aus Edelstahl (CFSST) behandelt. Zur Beschreibung des statischen Spannungszustands wird zunächst die Summe der GSED (Generalized Strain Energy Density)‐Werte (Eij) der Kurzstütze bei jedem Lastwert (Fj) als Ej,norm standardisiert. Anschließend wird der stark ansteigende Spannungszustand, unter Beachtung des Gesetzes von quantitativer Veränderung zu qualitativer Veränderung, durch Anwendung des Mann‐Kendall (M‐K)‐Kriteriums auf die Ej,norm‐Fj‐Kurve herausgearbeitet. Die Untersuchung zeigt die allgemeinen Charakteristiken der Veränderungen des Spannungszustandes von kurzen Stützen bei bestimmten Einzellasten, was die Präzisierung der Versagenslast ermöglicht. Darüber hinaus wird nachgewiesen, dass das simulative Arbeitsverhalten kurzer Stützen die Spannungszustände widerspiegeln kann, die sich aus den experimentellen Daten ergeben. Daher werden die Bedingungen der Versagenslasten von kurzen CFSST‐Stützen unter Verwendung der simulativen Daten formuliert und diese durch experimentelle und simulative Daten validiert. Insgesamt untersucht diese Studie eine neue Möglichkeit zur Erkennung unsichtbarer Arbeitseigenschaften von Tragwerken. Im Idealfall gibt sie Anlass zu entsprechenden Untersuchungen verschiedener Tragwerke, sodass die Ergebnisse zu einer Verbesserung der Bemessungsvorschrift führen können.

Stressing State Analysis of SRC Column with Modeling Test and Finite Element Model Data

“…The above problems are common in structural engineering research. Zhou [16][17][18][19][20][21][22][23][24][25][26] deeply considered the above problems and challenged the uncertainty in the structural analysis process. Zhou emphasized that structural failure is an evolutionary process with a definite starting point, and there are apparent mutation laws and interaction laws between elements in the evolutionary process.…”

“…The failure starting point of a structure, i.e., the moment when the stressing state of a structure changes from a steady state to an unsteady state, is more valuable for structural analysis and design. The general damage laws revealed based on the damage starting point of a structure have been: statically loaded steel nodes [17]; hysterically loaded reinforced masonry shear walls [18,19]; steel frames [20]; steel pipe concrete columns [21]; concrete filled steel pipe arches [22,23]; concrete filled steel pipe arch bridges [24]; continuous curved box girder bridges [25]; space mesh shells [26] and other structures; more than a dozen structures have been verified under different working conditions.…”

“…Traditional structural analysis often revolves around the intrinsic structure model, ultimate states, damage modes, and peak load carrying capacity. However, the structural stressing state theory proposed by Zhou [16][17][18][19][20][21][22][23][24][25][26] argues that by modeling the displacement, strain, stress, and strain energy of the test or finite element method as the stressing state characteristic pairs (mode-characteristic parameters) can characterize the structural stressing state and reveal its failure characteristics. Moreover, the obtained characteristic points are defined as the starting point of failure, which is a very stable characteristic point and can be used as a design reference point for the structure.…”

An Investigation Into Working Behavior Characteristics of Parabolic CFST Arches Applying Structural Stressing State Theory

“…This numerical mode is called as structural stressing state mode. In this study, GSED is applied to express the stressing state at the measured point (Huang, Y. Zhang, M. Zhang, & Zhou, 2014;Shi, Li, Chen, Zheng, & Zhou, 2018), that is…”

Research on the General Failure Law of a CTRC Column by Modeling FEM Output Data

“…Moreover, structural stressing state modeling analysis has revealed its deterministic failure starting point and an elasto-plastic branching point in more than a dozen different working conditions and structures. These include steel nodes [ 9 ], reinforced masonry shear walls [ 10 , 11 ], steel frames [ 12 ], stainless steel tubular concrete columns [ 13 ], spiral reinforcement concrete columns [ 14 ], steel tube concrete arches [ 15 , 16 ], steel tube concrete arch bridges [ 17 ], continuous curved box girder bridges [ 18 ], and space mesh shells [ 19 ]. Other structures under static conditions, hysteresis conditions, and simulated shaking table conditions have revealed the deterministic failure starting points and elastoplastic branch points.…”