Analysis of reliability of compressed masonry structures

Zięba, Joanna; Skrzypczak, Izabela

doi:10.1515/eng-2020-0055

Cited by 5 publications

(5 citation statements)

References 4 publications

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“…F . In the literature [27] we can find recommendations suggesting limiting the value of F to the level of 0,6 -0,7, because it is the largest practically possible value of the share of variable loads in the total loads occurring in typical constructions.…”

Section: Discussionmentioning

confidence: 99%

Archives of Civil Engineering

Zięba

Buda‐Ożóg

Skrzypczak

2021

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The safety of the masonry structure is determined by the value of the partial factor used, which is influenced by many factors. The variability of these factors determines obtaining significant differences in the load levels of various masonry structures. Hence, the analysis of masonry structures should be carried out taking into account a sufficient range of variability of factors affecting its safety. The article presents a multi-stage safety analysis of an exemplary brick masonry column. For the construction, the relationship between partial factors used for interactions in different configurations and factors for the masonry compressive strength was examined. The analyses consisted in determining the reliability index E with the Monte Carlo method. The article presents the results of experimental tests carried out on a real construction, as well as the results of FEM numerical simulations.

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Section: Discussionmentioning

confidence: 99%

Archives of Civil Engineering

Zięba

Buda‐Ożóg

Skrzypczak

2021

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“…The suggestion distribution of the resistance of the structure can be defined by a lognormal distribution [27,44]. 14 representative structural members were selected and the statistical parameters for resistance of different structural members under different stress statuses are given in Table 4 [26,45]. According to the design value method, there is:…”

Section: Statistical Parameters and Partial Factors For Resistancementioning

confidence: 99%

“…Reliability-based structural analysis of buildings and constructions made from conventional materials such as masonry, steel or concrete is commonly available in literatures. The theoretical background and basic principles for the reliability analysis and calculations can be found in [17][18][19][20][21][22][23], which already has been applied in several studies [24][25][26][27][28][29]. Peng et al [24] studied the reliability of long span structure under wind and snow loading, and their results indicated that the equivalent extreme-value of element stress of the structure subjected to the dead load and the 100-year return period of wind and snow loads is far less than the allowable value, and the long-span building structure is therefore safe enough.…”

Section: Introductionmentioning

confidence: 99%

“…By applying the appropriate set of partial factor for strength and partial factors for actions in accordance with the recommendations of the Eurocodes. Joanna Zięba et al [26] presents an analysis of the reliability of a compressive masonry structure on the example of a wall fragment made of silicate blocks, and the relationship between partial factors applied to actions in various configurations and factors for the compressive strength of masonry was investigated. Considering samples generated by Latin Hypercube Sampling (LHS), the appropriate target reliability levels based on simulations of different scaffold design situations for facade scaffolds were proposed, based on which partial factors are determined [27].…”

Section: Introductionmentioning

confidence: 99%

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Research on Reliability of Structural Members Subjected to Snow or Wind Load for Design Working Life of 100 Years in China

Cheng

Yao

et al. 2022

Sustainability

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Various national and international standards for building structures and other common structures specify a design working life of 50 years. Therefore, the statistical parameters of loads and the design expressions in current design codes are also based on a design reference period of 50 years. When the design working life is not 50 years, the variable load adjustment factor for the design working life needs to be considered. The corresponding load adjustment factors of office building live load, residential live load, snow load, and wind load are given in (GB50153-2008), (GB50009-2012), and (GB50068-2018) with different design working life (5, 10, 20, 30, 75 and 100 years), respectively. However, the recommended values presented in these documents are inconsistent and no provisions are found in those specifications for the selection of load design parameters in the design expression, which will result in designers having doubts in choosing design parameters, especially for building structures designed for a working life of 100 years. Using different design parameters in the design expression, the implied reliability level of the members with a design working life of 100 years was clarified in the paper. Furthermore, guidance for the specification in actual design is provided. For structural members designed for working life of 100 years, 14 representative structural members were selected to calculate their partial factors of resistance. Considering two simple combinations (dead load and wind load, dead load and snow load) and common load effect ratios, the reliability analysis of each member are carried out according to the load partial factors in China’s old and new codes. The study indicated that the structural importance coefficient of 1.1 needs to be taken in the design expression to increase all the load effects on the structural members designed for 100 years. The basic wind pressure and snow pressure should be taken with a return period of 100 years and the variable load adjustment factor for the design working life should not be considered.

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“…The design strength of the masonry is determined from the relationship [ 19 ]:

where:

—partial factor for materials, including uncertainties about geometry and modelling;

—partial factor taking into account the uncertainty of the theoretical calculation model of the structure.…”

Section: Introduction To the Design Of Masonry Structuresmentioning

confidence: 99%

Calibration of Partial Safety Factors of Sample Masonry Structures

2021

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Technological progress in masonry structures has resulted in the creation of competitive solutions, which force the need for an ever deeper recognition of this type of structure. Masonry is a composite with heterogeneous strength properties. Therefore, the most appropriate way to accurately describe the behavior of the masonry structure under the influence of the working load are experimental research and their statistical and probabilistic analysis. This article presents a series of experimental tests carried out on real masonry structures. The results of the experiments were subjected to static evaluation, determining the most important parameter in the probabilistic analysis—the coefficient of variability of strength. The variability obtained in the experimental studies was used to determine the safety of the structure in the probabilistic method. Achieved values of coefficients of variation and safety coefficients proved to be satisfactory and adequate to the emerging technological progress in the production and embedding of masonry components.

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Analysis of reliability of compressed masonry structures

Cited by 5 publications

References 4 publications

Archives of Civil Engineering

Archives of Civil Engineering

Research on Reliability of Structural Members Subjected to Snow or Wind Load for Design Working Life of 100 Years in China

Calibration of Partial Safety Factors of Sample Masonry Structures

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