Equation for achieving efficient length of link-beams in eccentrically braced frames and its reliability validation

Najafi, Leila Haj; Tehranizadeh, Mohsen

doi:10.1016/j.jcsr.2016.11.020

Cited by 11 publications

(3 citation statements)

References 24 publications

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“…The features of the designing methodology on the basis of system reliability are revealed. In [9] we consider the choice of effective length of beams for frame models, widely used seismic resistance of the system, in order to minimize the amount of dispersion in structures. The estimation is carried out with the help of the proposed equation, taking into account the different height of structures prone to bias.…”

Section: Main Bodymentioning

confidence: 99%

Steel Statically Uncertain Transverse Frames Probabilistic Calculation

Chichulina¹,

Chichulin²,

2018

IJET

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The aim of the work is probabilistic calculation and evaluation of steel statically uncertain frames reliability parameters and recommendations development for reducing their material content by controlling the reserves of the load bearing capacity of the.A method for evaluating the reliability parameters of steel statically uncertain frames by all able-bodied statens is developed. Logical probabilistic methods of statically uncertain systems work are used. The probability estimation method of statically uncertain systems failure based on the boundary equilibrium method, taking into account the correlation of individual destruction schemes, is obtained. The method of calculating the significance and contribution of individual frame elements and their influence on the system failure probability as a whole is proposed. The practical method of designing steel statically unidentified frames with the use of steel statically uncertain constructions reliability coefficient γs is offered. The scientific novelty of the work is to develop a scheme for determining frames failure probability by estimating the working capacity. In particular, the fragile and plastic fracturing failures of the frame section are considered. The algorithms for calculating the steel frames failure probability are determined by the probabilistic method of graphical equilibrium. The steel frame separate elements significance indexes are determined. The numerical experiment on the developed programs on a PC is presented for estimation of steel frames failure probability of various sections. the of of steel statically uncertain constructions reliability coefficient γs is proposed for usage.The practical value is more complete consideration of the structures and the probabilistic nature of strength and load, the use of the reliability coefficient. The possibilities of obtaining more economical frames in the design of new ones as well as reconstruction of existing buildings and facilities are identified. Based on the proposed methodology, algorithms and developed programs on the PC for the probabilistic calculation of steel statically uncertain frames for various purposes are compiled.

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Section: Main Bodymentioning

confidence: 99%

Steel Statically Uncertain Transverse Frames Probabilistic Calculation

Chichulina¹,

Chichulin²,

2018

IJET

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“…Lu et al [9] set the bounding threshold to only select two failed bars at each stage. Najafi et al [10] only selected the bar with the smallest reliability index when identifying the failure path of the series structure. In the above research, the use of the β-unzipping method has the problem of a lack of reasonable criteria for the selection of the bounding threshold.…”

Section: Introductionmentioning

confidence: 99%

Series–Parallel System Analysis and Reliability Research of Grid Structures Considering Adaptive Dynamic Bounding Threshold

Zhang,

Yi,

2024

Buildings

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There are many bars in grid structures, and their topological relationships are complex, so the workload of calculations involved in researching their reliability is large. In this paper, based on the geometric topological relationship within a grid structure, a series–parallel system analysis of the structure is carried out by means of node analysis, constraint grade division, and hierarchical combination analysis, and the series–parallel analysis results for the structure are used to judge the failure of the structure. In order to avoid the problem of missing important components due to unreasonable selection of the bounding threshold when identifying failed components, an adaptive dynamic bounding threshold method with high accuracy is introduced. The failure probability value of the failure path is calculated using the direct numerical integration method, and the reliability of the whole structure is obtained. Finally, the validity of this method is verified using an example of a square pyramid grid structure. The results show that the method is feasible for series–parallel system analysis, structural failure judgment, and reliability analysis of a grid structure.

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“…While the safety status of certain parts might be reliable, others can be dangerous. The β-unzipping method regulates parts whose reliability index is below a certain threshold and are considered critical parts [24]. The failure of critical parts will result in stress redistribution and create new critical parts.…”

Section: Introductionmentioning

confidence: 99%

Tunnel Failure Evolution and System Reliability Analysis Based on the β-unzipping Method

2021

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The structural failure of a tunnel is a process that evolves from local damage to overall destruction. The system reliability analysis method can be useful for analyzing the evolutionary law of local structural failure. In many complex stress environments, the structural performance function may be very complicated or even impossible to solve. This paper establishes a response surface function to represent the implicit tunnel performance function. The reliability of the shear capacity of a tunnel is considered. The critical parts and critical failure paths of the tunnel system are determined using the β-unzipping method. Failure evolution is analyzed to obtain the failure process of the tunnel system. Different failure modes are shown under different cases. Based on the partial failure probability and impact on the tunnel system, the risk levels of the critical parts at each stage of the failure history are evaluated. Therefore, the tunnel failure tree model obtained by combining the response surface method and β-unzipping method plays an important role in tunnel reliability evolution, and can evaluate tunnel safety comprehensively.

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Equation for achieving efficient length of link-beams in eccentrically braced frames and its reliability validation

Cited by 11 publications

References 24 publications

Steel Statically Uncertain Transverse Frames Probabilistic Calculation

Steel Statically Uncertain Transverse Frames Probabilistic Calculation

Series–Parallel System Analysis and Reliability Research of Grid Structures Considering Adaptive Dynamic Bounding Threshold

Tunnel Failure Evolution and System Reliability Analysis Based on the β-unzipping Method

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