Abstract Buildings are energy- and resource-hungry: their construction use account for around 39% of global carbon dioxide emissions; they consume 40% all the energy produced; responsible over 35% EU's total waste generation; about 50% extracted (fossil) materials. Therefore, present a significant challenge to meeting national international Net Zero targets reducing greenhouse emissions fossil resource use. The CircularB Project, is at heart this issue, which will underpin synergies...

As an environmental-friendly material with eligible mechanical properties, FFRP (Flax Fiber Reinforced Polymer) composites are being widely studied and used in the construction industry. This paper presents investigation of effect environmental humidity on viscoelastic properties FFRP. Frequency sweep tests conducted, results re-organized by Time-Temperature Superposition Principle (TTSP). The Huet-Sayegh model is introduced to describe relationship between loading frequency. fractional...

This paper deals with the numerical and experimental analysis of a large-scale footbridge model made flax fiber-reinforced polyester composite. The goal this work was to support design 15 m span flax-polyester installed at Floriade Expo 2022 in Almere, Netherlands. stacking sequence, thicknesses, material, vacuum infusion technology are identical those footbridge. For analysis, multi-layered laminate modeled using ABAQUS composite layup continuous shell elements. equipped 16 embedded...

Abstract Flax fiber‐reinforced polymer (FFRP) composites are emerging popular environmental‐friendly construction materials. However, their significant creep properties have been a major concern for using FFRP in load‐bearing structures. This article presents an investigation of the effect environmental humidity on behavior FFRP. Samples with flax fiber 0°, 90°, and ± 45° were manufactured, respectively, by vacuum infusion method. Accelerated tests conducted samples different relative...

This paper deals with the design, production and monitoring of a bio-composite footbridge span 14 m across river Dommel in city Eindhoven, Netherlands. The specific material that was used for this research is Natural Fibre Reinforced Bio-Polymer (NFRBP). goal to prove NFRBP can be applied as load-bearing structure an outdoor environment. For purpose, multidisciplinary team academic researchers from two universities Centre Expertise Biobased Economy, together manufacturer industry, have...

This paper presents the research which is carried out in field of adaptive structures at Institute for Lightweight Structures University Stuttgart. The application systems architecture and structural engineering creates new chances to design lightweight structures. Different concepts active control can be used manipulate forces, deflections vibration These are categorised into two groups: external loads internal forces. Active shape reduce wind load by changing cross-section wide-span...

This article presents a smart composite that shows reversible bending deformation from an initial flat configuration into 90° angle controlled by local thermal activation. The novelty lies within the structural fixation of at room temperature without continuous energy input. new architecture antagonistic performing shape memory alloy actuators embedded in polymer matrix is presented. locally heated rigid glassy state to easily deformable rubbery integrated heating wires. By subsequent...

Abstract This paper presents numerical and experimental studies on semi‐active seismic response control of structures equipped with variable stiffness damping structural joints. Such adaptive joints, which are comprised a shape memory polymer (SMP) core reinforced by an SMP‐aramid composite skin, function as load‐transfer components well devices. The SMP material can transition from glassy to rubbery state through thermal actuation resulting in shift the natural frequencies parallel increase...

This paper presents design and characterization of a new type structural joint which can vary its stiffness through actuation. Stiffness variation is employed to control the dynamic response frame structures equipped with such joints. The made shape memory polymer (SMP) core reinforced by an SMP-aramid composite skin. A controlled reduction material, induced resistive heating, results in shift structure natural frequencies. work comprises two main parts: 1) material thermomechanical...

Abstract Natural plant fiber-reinforced polymer composites (PFRP) have emerged as an environmental-friendly material in the construction industry, but their creep behavior is a critical concern for load-bearing structures. This study investigates of flax (FFRP) using time–temperature superposition principle (TTSP). Due to application TTSP on tensile FFRP not fully understood, three potential methods calculating parameters during are compared obtain efficient method build master curve. A...

The present research is aimed at examining the changes in tensile and compressive properties of natural fiber-reinforced composites (NFRC) exposed to various humidity conditions; this due fact that moisture content (MC) fibers generally assumed be detrimental composite performance. It was found once exposed, strength strain specimens would higher than those tensile, whereas modulus elasticity lower. Due increasing content, although elongation all tests enhanced, declined by 15% decreased...

Abstract This study examines the influence of weathering aging on mechanical properties and durability flax fiber‐reinforced polymer composites (FFRP) intended for outdoor applications. Employing an accelerated environment replicating natural conditions, encompassing UV radiation, condensation, water spray, FFRP samples with 2 4 mm thicknesses underwent exposure durations 0, 500, 1000, 1500 h. Mechanical tests characterized tensile, flexural, inner‐plane shear properties, while a custom‐made...

Flax Fiber Reinforced Polymer (FFRP) composites, known for their eco-friendliness and mechanical strength, find extensive application in construction. This study investigates the influence of moisture content flax fiber fabrics on FFRP's viscoelastic properties. Isothermal frequency sweep tests were conducted to assess dynamic properties under varying levels. The Huet-Sayegh model, with fractional order integration, was employed analysis. Results indicate optimal when fabric humidity matches...

<p>The structural engineering community has a strong responsibility to contribute more efficient use of natural resources. Nowadays the construction industry is by far most resource intense sector, approximately 40-50% all primary raw materials are used, which raises question about architects and engineer’s accountability. In this context as result Paris Climate agreement Dutch government defined program “Nederland Circulair in 2050”, states ambition 50% less 2030 have full circular...

This paper presents experimental testing of a new semi-active vibration control device comprising shape memory polymer (SMP) core that is reinforced by an SMP-aramid composite skin. works as load-transfer component can be integrated into truss and frame structures in the form joint. At material level, thermal actuation from ambient (25 °C) to transition temperature (65 causes significant 40-fold increase damping due viscoelastic effects. uniaxial tensile four-point bending tests have shown...

Abstract Der vorliegende Artikel gibt eine grundlegende Übersicht über adaptive Systeme. Dabei werden zunächst die elementaren Grundlagen vorgestellt und Funktionsweisen adaptiver Systeme erläutert. Daran anschließend sich bei der Einführung in das Bauwesen ergebenden Möglichkeiten am Beispiel Gebäudehüllen Tragwerke aufgezeigt.