Safety formats for non-linear finite element analysis of reinforced concrete structures: discussion, comparison and proposals

Castaldo, Paolo; Gino, Diego; Mancini, Giuseppe

doi:10.1016/j.engstruct.2019.05.029

Cited by 106 publications

(64 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Castaldo et al [35] used an uncertainty safety factor to overcome the effect of experimental uncertainties on estimations. This is important, especially for cement-based composites.…”

Section: Sample Preparationmentioning

confidence: 99%

Engineering Properties of Basalt Fiber-Reinforced Bottom Ash Cement Paste Composites

2020

View full text Add to dashboard Cite

Extinction of natural resources builds up pressure on governments to invest in research to find more sustainable resources within the construction sector. Earlier studies on mortar and concrete show that bottom ash and basalt fiber are independently alternative binders in the concrete sector. This study aims to use bottom ash and basalt fiber blends as alternative novel-based composites in pure cement paste. The strength and durability properties of two different percentages of bottom ash (40% and 50%) and three volume fractions of basalt fiber (0.3%, 0.75%, and 1.5%) were used at three curing periods (7, 28, and 56 days). In order to measure the physical properties of the basalt-reinforced bottom ash cement paste composites flowability, dry unit weight, porosity, and water absorption measurements at 7, 28, and 56 days of curing were performed. Furthermore, the mechanical properties of composites were determined by unconfined compressive strength and flexural strength tests. Finally, to assess the durability, sulfate-resistance and seawater-resistance tests have been performed on composites at 28 and 56 days of curing. Results showed that the addition of basalt fiber improves the physical, mechanical, and chemical stability properties of paste up to a limiting basalt fiber addition (0.3% volume fraction) where, above, an adverse effect has been monitored. It is clear that observed results can lead to the development of sustainability strategies in the concrete industry by utilizing bottom ash and basalt fiber as an alternative binder.

show abstract

“…Castaldo et al [35] used an uncertainty safety factor to overcome the effect of experimental uncertainties on estimations. This is important, especially for cement-based composites.…”

Section: Sample Preparationmentioning

confidence: 99%

Engineering Properties of Basalt Fiber-Reinforced Bottom Ash Cement Paste Composites

2020

View full text Add to dashboard Cite

show abstract

“…Shatnawi et al [20] used a finite-element method to study the behaviour of reinforced concrete BCs with different dimensions and thicknesses under different soil fill heights. Castaldo et al [21] used a nonlinear finite element model to study the failure modes of reinforced concrete beams with web openings, which were affected by the material properties defined in the model. His study described some proposals regarding the safety formats for nonlinear finite element analysis within the approach of the global resistance format to estimate the design strength of reinforced concrete structure.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study and Numerical Simulation on Failure Process of Reinforced Concrete Box Culvert

Gong

Tan

et al. 2020

Advances in Civil Engineering

View full text Add to dashboard Cite

Culvert is an important part of roads whose healthy operation is related to the efficiency and safety of road transportation. Therefore, it is very important to evaluate the safety of culvert structure by load test. Four types of prefabricated reinforced concrete box culverts (integral BC, round hinged BC, flat seam BC, and mortise BC) were designed in this paper. By designing a scale model test, the sensor system was used to test the mechanical properties of BC, which included dial indicators, strain gauges, and a pressure sensor. The finite element analysis based on material nonlinearity and contact nonlinearity of round hinged BC and integral BC was carried out. After validating the finite element models, mechanical properties of reinforcement and concrete of BCs were analyzed. The experimental results show that the failure mode of BC was tensile failure of concrete at the bottom of top slab under bending action, and integral BC had the maximum carrying capacity. The contact behaviour of sliding and rotating at hinge joints caused the first principal tensile stress of concrete at the internal surface of the side wall below hinge joints.

show abstract

“…In particular, existing bridges and viaducts are extensively exposed to environmental actions, time dependent phenomena (e.g., creep, shrinkage, prestressing steel relaxation), degradation (e.g., corrosion due to carbonation and/or chloride penetration), and increasing magnitude of traffic loads. For these reasons, several investigations have been devoted to define methodologies to assess efficiently existing structures and infrastructures also including refined analysis methods . Moreover, national Authorities are strongly interested in the assessment of existing structures, with particular care for existing bridges and viaducts, due to the high costs for maintenance, interventions and upgrading.…”

Section: Introductionmentioning

confidence: 99%

“…For these reasons, several investigations have been devoted to define methodologies to assess efficiently existing structures and infrastructures also including refined analysis methods. [1][2][3][4][5][6] Moreover, national Authorities are strongly interested in the assessment of existing structures, with particular care for existing bridges and viaducts, due to the high costs for maintenance, interventions and upgrading.…”

Section: Introductionmentioning

confidence: 99%

Partial factor methods for existing structures according to fib Bulletin 80: Assessment of an existing prestressed concrete bridge

Gino

Castaldo

Bertagnoli

et al. 2019

Structural Concrete

Self Cite

View full text Add to dashboard Cite

The assessment of existing reinforced concrete structures is one of the major aspects for engineers and practitioners. In particular, existing infrastructures, as bridges and viaducts, are extensively exposed to environmental actions, materials aging, degradation, and variation of magnitude of traffic loads during their service life. Hence, the assessment of existing structural systems assuming the same criteria conceived for the design (i.e., partial factor method—EN 1990) can be too conservative and, sometimes, may lead to unnecessary and expensive structural interventions. In this context, fib Bulletin 80 defines the partial factor methods suitable for the assessment of existing reinforced concrete structures accounting for their residual service life, information from in situ and laboratory tests, measurements of variable actions and reduced target reliability levels according to both economical and human safety criteria. The methodologies proposed in fib Bulletin 80 have been applied to assess the safety of an existing prestressed reinforced concrete bridge built in 90s and located in Italy. The results are compared to the outcomes from the assessment performed according to EN1990 and, finally, limits and advantages of the methodologies proposed by fib Bulletin 80 are discussed.

show abstract

Safety formats for non-linear finite element analysis of reinforced concrete structures: discussion, comparison and proposals

Cited by 106 publications

References 17 publications

Engineering Properties of Basalt Fiber-Reinforced Bottom Ash Cement Paste Composites

Engineering Properties of Basalt Fiber-Reinforced Bottom Ash Cement Paste Composites

Experimental Study and Numerical Simulation on Failure Process of Reinforced Concrete Box Culvert

Partial factor methods for existing structures according to fib Bulletin 80: Assessment of an existing prestressed concrete bridge

Contact Info

Product

Resources

About