The article discusses the possibility of using high and low density polyethylene waste as aggregate in lightweight concrete with strength cement mortar. Research is dedicated to experimental investigation comparison material properties made expanded clay aggregates. Hydration kinetics studies specimens different aggregates are performed measurements ultrasonic pulse velocity. For plastic water absorption hydrophobic surface were used. It stated that after 7 days curing showed significant...

One of the most difficult issues in theory reinforced concrete (RC) is an adequate modelling deformation behaviour, cracking and, particularly, post-cracking as one major sources non-linearity. Applying concept average and strains, behaviour RC can be modelled by stress–strain tension–stiffening relationships. The authors proposed innovative inverse technique for constitutive flexural elements. based on smeared crack approach layer model section. aims at deriving models from experimental...

Adequate modeling of reinforced concrete (RC) cracking and, particularly, post-cracking behavior (tension-stiffening), as one the major sources a nonlinearity, is most important and difficult task deformation analysis. Present investigation aims at deriving steel-related tension-stiffening relationship based on smeared crack approach. The analysis uses results experimental program performed by authors. It consisted three beams with deformed bars 18, 14 10 mm in diameter. Other...

The dapped-end beam is a widely utilized structural component that offers many benefits in real-world applications. However, abrupt changes the geometry result complex stress flows, rendering conventional calculation methods unreliable. estimation of bearing capacity becomes particularly challenging when such elements are designed with prestressed reinforcement. Previous studies have identified prestressing can negative impact on behavior beams specific configurations; however, this effect...

Experimental investigation of structural behavior glass fiber reinforced polymer (GFRP) space truss bridge model subjected to static loading is discussed in this paper. Bridge prototype was assembled using GFRP profiles produced by Fiberline Composites Ltd, steel bolts and brackets. In order load the structure, wooden deck installed. Total 13.3 kN applied four stages while measuring node displacement. Flexural structure monitored at every stage. perform comparison analysis behavior,...

The article focuses on utilizing unmanned aerial vehicles (UAV) to capture and classify building façades of various forms cultural sites structures. We propose a Pareto-optimized deep learning algorithm for detection classification in congested urban environment. Outdoor image processing becomes difficult typical European metropolitan situations due dynamically changing weather conditions as well objects obscuring perspectives (wires, overhangs, posts, other parts, etc.), therefore, we also...

Concrete is the most widely used material for bridge structures in Lithuania. A case study performed by authors revealed that application of fibres might improve serviceability such structures. However, adequacy prediction post-cracking behaviour steel fibre reinforced concrete be insufficient. The latter issue closely related to assessment residual strength concrete. strength, cases, considered as a property cracked structural members with bar reinforcement, straightforward values assessed...

Steel fibre reinforced concrete (SFRC) has become widespread material in areas such as underground shotcrete structures and industrial floors. However, due to the absence of models SFRC reliable for numerical analysis, application fields this are still limited. Due interaction with fibres, a cracked section is able carry significant portion tensile stresses, called residual stresses. In present practices, stresses used strength, deflection crack width analysis quantified by means standard...

Abstract The application of steel fiber reinforced concrete (SFRC) is continuously increasing; however its potentials are limited due to the lack universally accepted and reliable design guidelines. main reason for that a complex issue quantifying tensile stresses, called as residual stresses (σfr), which cracked section able carry interaction with fibers. This paper deals determination stress-crack opening (σfr-w) relation SFRC. inverse technique was proposed σfr employing experimental data...

Steel fibre reinforced concrete (SFRC) has become widespread material in building areas such as underground shotcrete structures or industrial floors. However, due to the absence of universally accepted guidelines for SFRC, application fields this are still limited. This paper deals with assessment residual stresses tensile SFRC. An adequate method determination stress-crack opening relation, based on test data three-point bending beams is proposed. To verify analysis results a numerical...

The application of steel fibre reinforced concrete (SFRC) isconstantly increasing. However, due to the absence universallyaccepted guidelines for SFRC, fields this materialare still limited. Post-cracking load carrying capacity is aproperty most benefited by reinforcement,usually designed residual strength SFRC in tension, ffr.However, quantification ffr one critical issues.The research reported paper dedicated determining theresidual tension. experimental results often notched beams with...

The paper discusses the results of experimental and numerical modelling using two beams reinforced with GFRP bars. One beam was made plain concrete while other contained short steel fibres. influence fibres on deflection cracking behaviour studied. A comparative analysis has shown that significantly reduce deflections average crack width beam. Moreover, an addition to mix led a more ductile failure mode Numerical employing nonlinear finite element software ATENA revealed good agreement...