bluuebunny/crossref_metadata_2025_split huggingface dataset:
Supercapacitive Swing Adsorption of Carbon Dioxide: Current Status and Perspectives
Authors: Wang Yuanfei , Zhang Keliang , Feng Jijun , Sun Xianzhong , Li Chen , Wang Kai , Zhang Xiong , Ma Yanwei 
Published: September 2023

AbstractSupercapacitive swing adsorption (SSA) is a newly discovered electrochemically driven carbon dioxide capture method using the principle of electric double‐layer capacitor, which achieves the purpose of adsorption and desorption of CO2 by charging and discharging the supercapacitive electrodes. Based on this method, gas separation devices were designed which could adsorb CO2 from a mixture of carbon dioxide and nitrogen, and a series of factors affecting the CO2 adsorption capacity were explored. This review briefly introduces the SSA mechanism and the structural design of SSA modules, and analyzes the factors influencing the performance of SSA from multiple aspects, with emphasis on electrode materials, in order to find ways to improve the CO2 adsorption capacity of SSA modules.
Narrative incongruence in pandemic local governance: Mayors perform responsibility as communities demand responsiveness
Authors: Montiel Cristina J. , Dela Paz Erwine S. , Uyheng Joshua , Bulilan Ed Joseph 
Published: September 2023

AbstractSocial psychological scholarship highlights the value of leadership for mounting effective responses to the COVID‐19 pandemic. Yet considerably less is known about whether leaders and their respective communities talk about the social crisis in the same way. Through a narrative congruence framework, we interrogate how public storylines of leaders and their communities align or misalign. Utilizing a mixed methods approach, we analyse Facebook posts and comments by Metro Manila mayors and their online followers during the early months of the COVID‐19 pandemic. We uncover a narrative incongruence between (a) leaders who perform responsibility and (b) communities that demand responsiveness. Mayors prioritize equity to give the poor more relief aid, assure efficient cash disbursement, attribute higher infection rates to sufficient testing and blame noncompliant citizens for worsening outbreaks. On the other hand, communities seek equality in relief distribution, decry ambiguous cash disbursement, criticize testing failures and fault weak quarantine protocols for crisis escalation. We conclude with pathways for meaningful engagement between leaders and communities towards effective crisis response especially in the Global South.
Optimal management of coronary artery disease in patients undergoing TAVI: The heart team holds the power
Authors: Atkinson Tamara M. , Tibayan Yen 
Published: September 2023

Key Points
The presence and complexity of coronary artery disease (CAD) as well as angiography‐guided percutaneous coronary intervention regardless of completeness were not associated with worse outcomes compared to those without CAD undergoing transcatheter aortic valve implantation (TAVI).
Revascularization of CAD in patients undergoing TAVI is safe, but should not be performed routinely. Revascularization should be guided by the heart team.
Future randomized studies are needed to address whether revascularization in patients with CAD undergoing TAVI impacts clinical outcomes post‐TAVI and if so, does completeness or timing of revascularization play a role.
Single Crystal Layered Oxide Cathodes: The Relationship between Particle Size, Rate Capability, and Stability
Authors: van den Bergh Wessel , Karger Leonhard , Murugan Saravanakumar , Janek Jürgen , Kondrakov Aleksandr , Brezesinski Torsten 
Published: September 2023

AbstractInvited for this issue's Front Cover is the group of Torsten Brezesinski at KIT. The cover picture presents the metaphor of cathode particles, their morphology and underlying rate capability as racers with different performances. Here we present a way to think about single crystal layered oxide cathodes, which stand apart from more common polycrystalline materials with regards to their relationship with size, diffusivity and morphology. Read the full text of the Concept at 10.1002/celc.202300165.
Numerical analysis of the component column web in tension with additional plates: stiffness evaluation.
Authors: López Manuel , Loureiro Alfonso , Gutiérrez Ruth M. , Reinosa José M. 
Published: September 2023

AbstractThis paper is focused on the behavior of bolted 3D beam‐to‐column joints, when the secondary beams are attached to the weak axis of the column by two additional plates welded between the column flanges. In this joint configuration the component column web in tension is modifying by the presence of the additional plates that must be considered in the stiffness evaluation. Moreover, the stiffness of this component is different in case of double‐sided and single‐sided joints. Therefore, based on the result of a parametric study with finite element models, two different mechanical models for the stiffness of the component column web in tension are proposed for double‐sided and single‐sided joints.
Accuracy assessment of predictive models for semirigid extended end‐plate connections
Authors: Ding Zizhou , Elkady Ahmed 
Published: September 2023

AbstractTaking advantage of semi‐rigid connections' inherent stiffness and strength can highly benefit the steel industry, since this can lead to efficient designs and consequently to lower construction costs and carbon emissions. This requires the ability to accurately predict the connection's moment‐rotation response. National standards and research studies proposed a number of predictive models to do so, including analytical, mechanical, and empirical models. This applies to the popular bolted extended end‐plate connections. A number of studies have indicated that such models have limitations and may provide inaccurate predictions. In this study, a recently compiled database, comprising more than 750 test specimens, is used to assess the accuracy of several models in predicting key response quantities related to stiffness, strength, and ductility. The mean and standard deviation of the prediction error is quantified while highlighting the advantages and drawbacks of each model. The results aim to shed light on the limitations of existing predictive models and offer recommendations for improved future models.
Full‐Scale Composite Moment‐Resisting Frame with Dissipative Bolted Connections under Monotonic Loads: Experimental versus Numerical Results
Authors: Don Rafaela , Balaskas Georgios , Vulcu Cristian , Hoffmeister Benno 
Published: September 2023

AbstractThe detailing of typical semi‐rigid beam‐to‐column joints in Germany was based on the assumption of low seismic actions, thus design could be covered by wind and gravity actions. Given the recent seismic hazard assessment of the national territory, in which the seismic risk was proved to be higher than formerly considered, questions have been raised about the approach to steel and composite joint design and detailing. Answers to the effect of increased seismic demands on semi‐rigid connections and to joint performance are provided in new studies of the authors. The performance (insufficient bending resistance and stiffness, brittle failures) and detailing deficiencies (small weld sizes, weak web panel) require improvements in order for joints to transfer higher bending moments and to conform to prEN 1998‐1‐2. Pre‐test analyses showed that, in comparison with current typical joints, improved solutions have 40% / 70% higher sagging / hogging bending resistance and sustain plastic deformations within connections prior to failure. Thus, the performance of joints designed for moderate‐low seismicity is experimentally assessed through monotonic and cyclic tests on composite frame specimens. The focus of the paper is on the monotonic response.
Ductile fracture simulation on 10.9 HP bolts under composite loading at elevated temperatures
Authors: Li Jie , Xin Haohui , Veljkovic Milan 
Published: September 2023

AbstractThe mechanical properties of the bolts deteriorate significantly at elevated temperatures; accurate prediction of the performance and fracture behaviour of steel bolted connections is essential for the fire safety assessment of steel structures and is a prerequisite for performance‐based fire safety design. Existing studies on the fracture mechanical properties of bolts at elevated temperatures are limited due to the difficulty and economics of testing. This paper presents the numerical analysis of combined loads on grade 10.9 high‐performance (HP) bolts. Based on the proven fracture analysis method, the fracture behaviour of HP bolts at high temperatures was investigated by fitting material parameters. Significant changes in the fracture shape of the bolts at high temperatures were found. The ultimate resistance, fracture deformation behaviour and strength reduction factors were analyzed. This study demonstrates the potential of using numerical analysis to reasonably predict the fracture behaviour of steel bolted joints at high temperatures and under complex loading conditions.
The influence of axial misalignment on the load‐bearing capacity of buttwelded joints
Authors: Voelkel Justus , Bartsch Helen , Feldmann Markus 
Published: September 2023

AbstractSteel structures in Europe are generally designed and dimensioned according to EN 1993. The execution, in turn, is carried out according to EN 1090‐2, which for the evaluation of welded joints refers to the quality levels of EN ISO 5817. Here, significant incompatibilities between the design, execution and quality standards have been identified in recent years. The evaluation of weld imperfections according to EN ISO 5817 is based on quality levels with clear limits. However, it is questionable whether the tolerances for weld imperfections defined by the assessment limits represent a realistic limit under static load conditions. To better understand the impact of weld imperfection size on the load bearing capacity axial misalignment and its' influence on load‐bearing capacity is investigated in this article. At first, the characteristics of the axial misalignment are described statistically and an overview of the current state of the art is given. Afterwards the results of quasi static large‐scale tension tests on buttwelded joints with axial misalignment are presented. Finally, the quality levels of EN ISO 5817 are evaluated regarding the influence of imperfection size on the load‐bearing capacity of joints containing axial misalignment.
Experimental and Theoretical Research on Welded Aluminium X‐Joints
Authors: Kalac Semso , Radlbeck Christina , Mensinger Martin , Lucic Dusko 
Published: September 2023

AbstractAluminium provides many advantages as a construction material in civil engineering, such as for example light weight, functionality by extruded profiles and corrosion resistance. It is obvious to use these advantages also for trusses. However, most aluminium alloys develop zones of weakening due to welding. The so called heat affected zones (HAZ) reduce the load‐bearing capacity of welded aluminium joints by up to 50%. Consequently, the design and execution of welded X‐joints within lattice girders are challenging. Indeed, the design of welded aluminium X‐joints is not specifically treated in EN 1999. Until now, the calculation of aluminium welded X‐joints relies on the steel standard EN 1993‐1‐8, which does not take into account the characteristic of aluminium. This results in errors and inefficient design. Thus, in this experimental research project the behavior of welded X‐joints in real‐scale models is explored. To this purpose, tests have been carried out on lattice girders made from aluminium alloy EN AW 6082 T6. In total, six girders with varying coefficient β and shape of the hollow section of brace members have been investigated. Thereby, the girders were loaded vertically until the failure of the X‐joints. Strains at the brace and chord members were measured by strain gauges and respective stresses were derived. In addition, a comparative analysis between experimentally and theoretically ‐ based on Eurocodes (EN 1993 part 1‐8 and EN 1999 part 1‐1) ‐ obtained results has been made. The analysis shows that the reduction of the load‐bearing capacity of welded aluminium X‐joints due to the HAZ is not constant but varies with the value of coefficient β and the shape of the cross‐section of the brace member. Obviously, the design of welded aluminium X‐joints based on EN 1993‐1‐8 applying a constant value for the HAZ does not reflect the true behavior of these joints as it leads to a quite conservative design approach.
Modal analysis of a riveted lattice beam for improved retrofitting operations
Authors: Franz Hannah , Chataigner Sylvain , Dieng Lamine , Rinke Mario 
Published: September 2023

AbstractWrought‐iron and mild‐steel riveted lattice beams are well‐represented in the metallic construction heritage of 1850‐1930. Many rafters and purlins of roof structures of train sheds or market halls are made of flat and angle bars assembled with single‐riveted joints. During retrofitting operations, those beams are often reinforced to prevent them from buckling. However, the assessment of the buckling risk depends strongly on the modelling assumptions regarding the out‐of‐plane rotational stiffness of the riveted joints. This paper therefore presents an experimental and numerical investigation aiming at quantifying this joint stiffness. A 3m‐long riveted lattice beam, dating from 1930, was collected from a demolition site. An experimental modal analysis was carried out and the measured natural frequencies and mode shapes were used to calibrate a finite‐element model of the beam. A parametric study suggests that the model with clamped connections, i.e. with high out‐of‐plane rotational stiffness, is in better agreement with the experimental results. This result could lead to a less conservative buckling risk assessment and less extensive strengthening measures.
Metal 3D‐Printing for Repair of Steel Structures
Authors: Ghafoori Elyas , Dahaghin Hamid , Diao Chenglei , Pichler Niels , Li Lingzhen , Ding Jialuo , Ganguly Supriyo , Williams Stewart 
Published: September 2023

AbstractThis work employs an innovative technique, wire arc additive manufacturing (WAAM) which is a type of directed energy deposition, for fatigue strengthening of cracked steel components. Different steel plates with a central crack were tested under high‐cycle fatigue loading regime, including a reference plate, a plate repaired by WAAM with as‐deposited profile, and a plate repaired by WAAM and subsequently machined to reduce stress concentration factors. Corresponding finite element simulation was conducted to provide a better understanding on the mechanism of WAAM‐repair. The existing central crack in the reference plate propagated and led to a rupture after 0.94 million cycles, while those in the two WAAM‐repaired plates did not propagate, due to the increased net cross‐section and the compressive stresses induced by the depositing process. However, in the second plate, a new crack initiated at the root of WAAM profile as a result of local stress concentration, and the fatigue life reached 2.2 million cycles (2.3 times as the reference plate). The third plate, on the other hand, survived more than 9 million fatigue cycles with no visible degradation, thanks to its smooth machined profile. The findings of this work indicate that WAAM repair shows great potential as a technique to address fatigue‐related damages in steel structures.
Numerical Modeling of Steel‐Concrete Composite Girders Exposed to Web Shear Buckling
Authors: Numanović Mehmed , Knobloch Markus 
Published: September 2023

AbstractAssessment of the structural behaviour of steel and steel‐concrete composite plate girders exposed to web shear buckling is essential when it comes to their implementation involving heavy loads and/or long spans. In this paper, numerical model of a benchmark steel‐concrete composite girder capable of capturing this phenomenon has been developed using the ABAQUS software. The developed finite element model, based on a series of large‐scale girders planned to be tested in the future, has been evaluated and elaborated on. That includes the implementation of appropriate analysis procedures, element types and contact behaviour in the study of the post‐critical buckling behaviour of steel and steel‐concrete composite plate girders. The advantages and disadvantages as well as recommendations for the future use of the investigated modelling strategies have been scrutinized. In the end, this study demonstrates the parameters with the most significant influence on the structural behaviour of composite girders exposed to shear loading.
Fatigue tests on connections of hollow sections made of high‐strength steel with shape‐optimized gusset plates
Authors: Winkler Matthias , Dürr André , Herion Stefan , Ladendorf Philipp 
Published: September 2023

AbstractStructures made of hollow sections are often used in the construction of steel bridges, agricultural machinery and trucks. Due to secondary bending moments and local stress concentrations at the connection between brace and chord these joints have a low fatigue strength. In case of high‐strength steels, a decisive fatigue design leads to larger wall thicknesses and dimensions of the hollow sections and thus to uneconomical constructions. In the course of the research project FOSTA P1442 truss joints of hollow sections made of high‐strength steels were reinforced by attached and plugged through gussets plates to increase the fatigue strength by relocating the most critical detail at the weld toe to areas subjected to lower stresses. At the University of Applied Sciences Munich, 35 large‐scale fatigue tests on hollow section K‐joints with differently shaped gusset plates were performed to verify the results of the Finite Element Analysis. In order to verify the applicability of the results to real structures, two trusses with a span width of 6 meters were tested. Based on the data of the experimental tests, a fatigue design recommendation for connections of hollow sections with gusset plates could be developed. Within this paper the set‐up and results of the fatigue tests are summarized.
Robustness analysis for composite multi‐storey modular buildings subjected to wind loads.
Authors: Swami Gaurav , Thai Huu‐Tai , Liu Xuemei 
Published: September 2023

AbstractIn this research, an attempt has been made to evaluate the structural response of multi‐storey composite modular buildings when subjected to lateral wind loads. Finite element (FE) models were developed in Abaqus for a general 10 storey composite modular building, with and without the consideration of lateral load resisting mechanisms of composite shear walls. Concrete filled steel tubular (CFST) columns and composite shear walls were proposed in place of conventional elements to improve the structural resistance, modularity, and construction timeframe. It was observed that under the effect of wind loads, the forces between the modules are transferred primarily by horizontal axial forces. When the effect of sudden module removal is considered along with the wind, the vertical shear forces in the horizontal inter‐module connection increase and the connection becomes critical in shear. Even though the probability of occurrence of critical wind loads and a sudden module loss is rare, it was concluded that the wind forces do not influence the overall stability of the structure in the event of progressive collapse by sudden module removal if an effective lateral load resisting mechanism has been designed.
The pavilion “Petite Maison” of the European Cultural Capital Esch'22: A case study of circular economy benefits in steel construction
Authors: Sayyareh Shahin , Ummenhofer Thomas , Odenbreit Christoph 
Published: September 2023

Abstract“Petite Maison” is a collaborative architectural project on the theme of circularity in construction within the Esch2022, European Capital of Culture, in Luxembourg. Focusing on a similar concept, the RFCS project “REDUCE” has previously worked out the structural and environmental analysis of a modularized construction approach to evaluate and highlight the benefits of a reusable, circular steel structure. As a follow up to this project, CoCo Project (Carbon Counting and Projection) currently occupies with the determination of suitable routes to point out low‐carbon emission scenarios for the construction sector considering especially steel and steel composite solutions as well as prefabricated structural elements, which may be in concrete or timber. In other words, the project aims to demonstrate the impact of circular economy objectives in the load bearing building structures, considering majorly columns and flooring solutions containing concrete slabs, Laminated Veneer Lumber (LVL), and steel beams. In this article, the environmental performance of Petite Maison flooring system, as a case study, is investigated in detail. Different scenarios are defined for steel elements to quantify the environmental impacts and to emphasise the benefits of modular and reusable structural components.
Improved Design Rules for Stainless and Carbon Steel Bolts Loaded in Tension and Shear
Authors: Abraham Christoph , Stranghöner Natalie 
Published: September 2023

AbstractThe design of non‐preloaded bolted connections as bearing type connections (category A), tension connections (category D) or bearing type connections subjected to tension and shear loading (categories A + D) is given in EN 1993‐1‐8 for carbon steel bolts. However, the design of these kinds of bolted connections made of stainless steel is given in EN 1993‐1‐4 mainly basing on those regulations developed for carbon steel bolts neglecting the specific material properties of stainless steel bolts. To overcome this lack of knowledge, experimental and numerical investigations as well as reliability analyses were systematically carried out for austenitic and duplex stainless steel bolts on their tension, single‐shear and their interaction resistance. Finally, more economical and harmonised design rules for stainless steel bolts could be developed and implemented in the revision of EN 1993‐1‐4 and the German technical approval abZ/abG Z‐30.3‐6:2022. Subsequently, the regulations covered in EN 1993‐1‐8 for carbon steel bolts were checked, considering already existing experimental results in literature and new test results carried out by the authors regarding the applicability of the newly developed rules for stainless steel bolts. As a result, it was found that the rules for carbon steel bolts can be improved, being in line with the newly developed rules for stainless steel bolts and meeting the Eurocode safety requirements.