Showing papers in "Engineering Structures in 2020"

TL;DR: The most recently developed functionally graded graphene platelets reinforced composite (FG-GPLRC) where GPLs are non-uniformly dispersed with more GPLs in the area where they are most needed to achieve significantly improved mechanical performance has opened up a new avenue for the development of next generation structural forms with an excellent combination of high stiffness, light weight and multi-functionality.

TL;DR: This paper uses extensive experimental databases to suggest random forest machine learning models for failure mode predictions of reinforced concrete columns and shear walls, employs the recently developed SHapley Additive exPlanations approach to rank input variables for identification of failure modes, and explains why the machine learning model predicts a specific failure mode for a given sample or experiment.

TL;DR: In this paper, a physics-guided convolutional neural network (PhyCNN) is proposed to predict building seismic response in a data-driven fashion without the need of a physicsbased analytical/numerical model.

TL;DR: In this article, a stress-strain model was developed to better understand and simulate the behaviour of FRP-confined concrete, which consists of the following three main components: (1) a hoop strain equation elaborated from the authors' previous study on steel-constrained concrete columns for application to FRP confined concrete; (2) a modified confined concrete model considering stresspath of confining stress (or history of hoop strain); (3) Interaction between FRP and concrete.

TL;DR: In this paper, a theoretical stress-strain model for concrete-filled steel-tube (CFST) columns was developed to better understand and simulate the behavior of CFST column, which consists of the following four main components: (1) Interaction between steel tube and concrete taken into account the de-bonding effect; (2) an accurate hoop strain equation; (3) a passively confined concrete model considering stress-path dependence; (4) a three-dimensional stress-strain model for steel tube.

TL;DR: A machine learning model based on the Random Forest method, which has 86% accuracy in identifying the failure mode of shear walls, is proposed and an open-source data-driven classification model that can be used in design offices across the world is provided.

TL;DR: In this paper, a database collecting 28 CFFT columns test results is assembled for establishing a new stress-strain model that comprises the following 4 parts: (1) A model of hoop strain set up by the authors taking into account the effects of concrete splitting cracks; (2) An adjusted constitutive model of actively confined concrete incorporating confining stress path dependent effect; (3) Bi-axial stress model of FRP tube; (4) a model addressing the compatibility condition of concrete and fiber-reinforced polymer (FRP) tube.

TL;DR: An in-depth review of the collapse typologies is proposed, with emphasis on the current techniques to study collapse propagation, i.e., numerical, experimental and analytical.

TL;DR: The use of ultra-high performance concrete (UHPC) to strength existing reinforced concrete (RC) structures in flexure has been explored in recent decades as discussed by the authors, and the state of research on the flexural strengthening of RC beams or slabs with UHPC was presented.

TL;DR: In this paper, the authors present a theoretical study on effects of combined impact and blast loadings on the failure behaviors and dynamic responses of a typical reinforced concrete (RC) column commonly used in medium-rise buildings.

TL;DR: A novel optimal T MDI design formulation is proposed to address occupants’ comfort in wind-excited slender tall buildings susceptible to vortex shedding (VS) effects and to explore optimal TMDI’s potential for transforming part of the wind-induced kinetic energy to usable electricity in tall buildings.

TL;DR: In this paper, the compressive behavior of bamboo scrimber columns under cyclic compressive loading was investigated for the first time and a cyclic stress-strain model, including the envelope and the unloading and reloading segments, was developed for predicting the entire cyclic strain response of the scrimber, which can be used to simulate the seismic response of bamboo structures.

TL;DR: A state-of-the-art review of the main applications of soft computing techniques to relevant structural and earthquake engineering problems is proposed, including the applications of fuzzy computing, evolutionary computing, swarm intelligence, and neural networks.

TL;DR: The results clearly infer that the proposed data-driven ML framework can effectively predict failure mode and shear capacity of prestressed and non-prestressed UHPC beams with varying reinforcement detailing and configurations.

TL;DR: Three domain adaptation techniques, namely joint training, sequential training, and ensemble learning are proposed and implemented to develop robust crack detection models that work on both datasets regardless of the material environment, demonstrate that the proposed techniques are able to successfully produce accuracies comparable to those of thematerial-specific models.

TL;DR: In this paper, the authors investigated the fragility of a 200m high concrete face rockfill dam (CFRD) subjected to mainshock-aftershock sequences based on multiple stripes analysis (MSA).

TL;DR: In this article, the partial safety factor corresponding to the resistance model uncertainties in the use of nonlinear finite element analyses (NLFEAs) for reinforced concrete systems subjected to cyclic loads is assessed.

TL;DR: In this paper, the authors presented an experimental study on monotonic axial compressive behavior of carbon FRP (CFRP) confined steel tube confined concrete (STCC) stub column and an analytical study on the confinement mechanism of and the ultimate axial bearing capacity of the elements.

TL;DR: It was found that the vehicle in the non-moving state can catch more bridge frequencies than in the moving state, and the contact-point response performs better than the car-body response, which can be used to detect the first few frequencies of the bridge, including the torsional frequency.

TL;DR: In this article, the buckling resistance of a novel active multidisciplinary sandwich plate (AMSP) under in-plane mechanical load or temperature change has been investigated, where an advanced porous core reinforced with carbon nanotubes (CNTs) integrated between two active piezoelectric faces.

TL;DR: In this paper, a bio-inspired multi-cell corrugated tube for energy absorption is proposed, which consists of two parts: an inner rib and a corrugation tube into which the inner rib is inserted.

TL;DR: A performance-oriented design procedure aimed at achieving a target displacement demand of the combined CSS + SMAGD system under the maximum credible design earthquake and a parametric study comprising a variety of CSS and SMAGD properties reveals that the proposed isolation layout is suitable to limit the maximum displacement under ultimate limit state earthquakes.

TL;DR: In this paper, the authors presented the first-ever axial compression test on RACFCTs having three different slenderness ratios ranging from 20 to 40; the effect of the recycled coarse aggregate (RA) replacement ratio is also examined.

TL;DR: A probabilistic approach for characterization of the regression pattern between bridge temperature and expansion joint displacement by use of Structural Health Monitoring data and for SHM-based condition assessment and damage alarm of bridge expansion joints is developed in the Bayesian context.

TL;DR: In this article, the authors proposed a novel SMA-steel coupled reinforcement for concrete bridge piers, which is intended to achieve the balance between self-centering and energy dissipation capacities.

TL;DR: In this paper, a flexural test was performed on steel-UHPC composite beams with stud connectors (SU-S) and bolt connectors(SU-B) at the interface.

TL;DR: The reliability-based approach is adopted to quantify the structural robustness of reinforced concrete (RC) structures subjected to progressive collapse since it is a trade-off between comprehensiveness and operability.

TL;DR: In this article, a new shape memory alloy (SMA) washer spring-based self-centering rocking (SCR) system was proposed for bridge piers, which combines the advantage of the existing rocking pier solution with extra benefits such as simplified construction, excellent fatigue and corrosion resistance, and extra locking mechanism which safely prevents the pier from excessive rocking.

TL;DR: In this paper, the authors investigated the stress-strain response, failure pattern and criteria of CTB under triaxial compression loading with various confining pressures and components and revealed how the confining pressure influences the deformation behavior of the CTB.

TL;DR: In this article, a single-degree-of-freedom (SDOF) model was proposed to quantify the effects of service load, initial velocity, initial displacements, and damping ratio on the dynamic response.