Editorial

It is with great pleasure that I present the editorial for this issue of Structures and Buildings. This issue features six high-quality research articles that address some of the most pressing topics in structural engineering and sustainable construction. The papers span a wide range of themes, including serviceability considerations in reinforced concrete (RC) slabs, wind resilience of flat roofs, seismic resilience with advanced damping and wall systems, and innovations in sustainable structural materials and design for circularity. Together, they reflect the evolving demands and opportunities within civil infrastructure design.Leite and Gomes (2025) investigate the sensitivity of RC slab deflection to spatial variability in reinforcement due to construction imperfections. Using finite-element modelling with stochastic input, the study quantifies the role of key variables such as concrete compressive strength and geometric deviations, concluding that these factors significantly influence deflection serviceability, while irregular reinforcement positioning exerts minimal impact. These findings are relevant for reliability-based design and quality control in RC construction.Li et al. (2025) explore a novel aerodynamic mitigation technique for wind suction on low-rise flat roofs by employing small horizontal-axis wind turbines. Experimental studies demonstrate that placing the turbine below roof level and near the windward edge can reduce peak wind suction by over 50%, while simultaneously enabling wind energy harvesting. This dual-function solution offers promise in both enhancing structural performance and supporting sustainable energy strategies in building design.Montazerian et al. (2025) introduce a low-tech, double square steel tube damper designed for use in braced frames to provide symmetric tension–compression hysteresis behaviour. Through experiments and finite-element analysis, the authors derive simplified design formulas for stiffness and yield strength, and demonstrate that the dampers can significantly reduce seismic responses such as roof acceleration and base shear. This innovation is particularly valuable for seismic retrofitting and affordable design in developing regions.Olofin (2025) presents a comprehensive review of the emerging material ‘nano steel’ and its potential for revolutionising civil infrastructure. The author details how nanotechnology can enhance steel’s mechanical and durability properties, including corrosion and fatigue resistance, thereby extending the life and sustainability of steel-based structures. The paper also outlines future research directions and challenges for integrating nano steel into mainstream construction.Király et al. (2025) discuss the development and evaluation of demountable shear connectors for use in steel–concrete composite structures, as part of a broader effort to advance circular economy principles. The proposed system, supported by experimental and numerical studies, enables easy disassembly and reuse of structural components, without compromising stiffness and load-bearing capacity. This research aligns well with global sustainability targets and offers practical tools for modular and temporary building systems.Ma et al. (2025) examine the seismic performance of RC shear walls incorporating coal gasification ash (CGA) as a partial cement replacement. The study demonstrates that CGA can enhance the ductility, load-bearing capacity and energy dissipation of shear walls. A new constitutive model and bearing capacity correction method are proposed to support the structural application of this sustainable material. These findings contribute to waste valorisation and the development of low-carbon construction practices.These papers represent valuable contributions from researchers in Brazil, China, Iran, Nigeria, Hungary and the USA, reflecting the global scope and collaborative nature of civil engineering research. I would like to thank the authors for their significant efforts and the reviewers for their thoughtful assessments which greatly enhanced the quality of this issue. I am also grateful to the Editor-in-Chief and the editorial board, as well as the production team for their efforts and dedication in publishing this excellent issue.I hope that the articles in this issue inspire readers to explore new ideas and advance the field of structural engineering in ways that are both technically robust and environmentally responsible. I strongly encourage feedback and discussions from the readership to continue shaping the future of our built environment.