Journal of Civil Engineering Beyond Limits (CEBEL)

Serhat DEMİRHAN

This investigation examines the potential of 3D-printed cement-based lattice structures as a revolutionary approach for sustainable construction methodologies. By utilizing additive manufacturing technologies, this research confronts significant drawbacks inherent in conventional cementitious materials, such as inadequate tensile strength and brittleness, through the incorporation of advanced lattice geometries. Principal findings indicate that lattice structures markedly improve material efficiency, decrease weight, and enhance mechanical performance, including increased ductility and durability. The study elucidates how these structures promote optimized stress distribution, thereby delaying crack propagation and ensuring enduring structural integrity when subjected to environmental effects such as cyclical loading, temperature variations, and moisture exposure. Furthermore, the research emphasizes the sustainability of 3D-printed lattice structures, highlighting reduced cement consumption and a diminished carbon footprint. The versatility of this methodology facilitates the production of lightweight, high-performance building elements that are well-suited for applications in resilient infrastructure, energy-efficient design, and disaster recovery initiatives. This pioneering approach not only propels material optimization and structural resilience but also aligns with global sustainability objectives, representing a significant advancement in the progression of construction technologies. These findings establish a basis for further investigation of scalable 3D printing applications and act as a guide for engineers and policymakers aiming to enhance material efficiency and sustainability in the construction sector.

https://doi.org/10.36937/cebel.2025.1978

ATAKAN YILDIRIM ABDULKADİR CÜNEYT AYDIN

Soil conditions play a fundamental role in the structural stability and deformation behavior of buildings, particularly under dynamic and static loading conditions. Understanding soil-structure interaction is crucial for ensuring the safety and performance of buildings, especially in regions prone to seismic activity. This study investigates the response of a 10-story steel building founded on two different soil types using numerical modeling in Plaxis 3D. The analysis is conducted with two widely used constitutive models: Mohr-Coulomb (MC) and Hardening-Soil (HS), to evaluate foundation settlement and bending moment distributions. The findings indicate that variations in soil stiffness and strength significantly influence structural performance, with softer soils exhibiting greater settlement and deformation. The HS model, which accounts for stress-dependent stiffness and nonlinear behavior, provides more accurate and realistic predictions compared to the MC model. These results highlight the importance of incorporating advanced soil models in geotechnical and structural analysis to enhance the reliability of engineering designs. Future research should focus on the effects of layered soil formations and site-specific conditions to further improve predictive accuracy in foundation design and seismic performance assessments.

https://doi.org/10.36937/cebel.2025.1983

Abdulkadir Cuneyt AYDIN

Governed by the laws of friction, Friction Pendulum Bearings (FPBs) represent one of the most important seismic isolation technologies, allowing structures to rest over the ground while dissipating seismic forces but retaining their maximum translation functionality through sliding. To this end, the present paper describes a comprehensive overview of FPB technology, including curvature specifications, manufacturing methods, and applications for engineering utilization. This is followed by an overview of FPB fundamentals and examining relevant information on historical evolution of FPB usage, design parameters, and the key performance parameters influencing the response: friction coefficients and load-displacement characteristics. Moreover, advanced manufacturing methodologies are also analyzed, namely material choice and production processes, to improve the FPB durability and efficiency. To analyze the significance of their use in abating dynamic forces, environmental aspects are taken into consideration while evaluating their long-terms output on the structural safety of FPB-supported structures. Future research directions combined with the expected advances in materials, numerical modeling, and structural integration methods. Synthesizing experimental data, numerical simulations, and case studies, this review should serve as a roadmap for optimizing FPB technology in order to improve seismic resilience of critical infrastructure.

https://doi.org/10.36937/cebel.2025.1984

Saad Issa Sarsam

The green asphalt cement binder is composed of asphalt and additives which are obtained from waste materials. Flexural-creep stiffness of asphalt binder is an indicator of its performance at low temperatures. In the present work, the influence of Nano and Micro additives (fumed silica, silica fumes, hydrated lime, and coal fly ash) on flexural creep stiffness of the green binder was evaluated. Conventional asphalt cement binder with penetration grades (60-70) and (40-50) were investigated. A significant control of such modification on creep stiffness was detected from the experimental program. It was detected that the creep stiffness of (60-70) binder is lower than that of (40-50) binder by 21 %. The creep stiffness of (60-70), and (40-50) green asphalt binders treated with fumed silica is higher than that of control binder by (12.5 and 25) % at failure respectively. While the creep stiffness of (60-70), and (40-50) green asphalt binders treated with silica fumes is higher than that of control binder by (17.8 and 35) % at failure respectively. For (60-70) and (40-50) binders, the creep stiffness increased by (25, and 6.2) % and (32.5, and 5) % after modification with hydrated lime and coal fly ash respectively. It was concluded that modification of asphalt binder with Micro or Nano additives exhibited a reasonable control on the creep stiffness of the binder of the sol and gel types. Additives are recommended to control the cracking of the binder at low temperatures.

https://doi.org/10.36937/cebel.2025.1986

Naci Büyükkaracığan

In recent years, sudden floods caused by global warming and climate change have increasingly impacted social life in Türkiye, leading to significant loss of life and property. At the same time, protecting and managing water resources has become essential to sustainably meet the growing demand for drinking water, particularly in metropolitan areas. The Demirci River Basin, located within the Gediz Basin and spanning the provinces of Manisa, Kütahya, and Uşak, serves as a critical source for both irrigation and, to a lesser extent, drinking water. Accurate estimation of annual peak flows is crucial, as these values are fundamental inputs in the planning and design of water resource projects and flood risk management. In this study, both statistical and synthetic methods were applied to estimate annual peak discharges in the Demirci River Basin. In the statistical approach, nine different probability distributions—including Log-normal-2, Gumbel, Pearson-3, Log-Pearson-3, Log-Boughton, log-logistic, Wakeby, Pareto and Weilbull were analyzed using six different parameter estimation techniques, resulting in a total of 28 model combinations. The suitability of these models was evaluated using the Kolmogorov-Smirnov, Chi-square, and Cramér-von-Mises tests. Additionally, synthetic methods such as Snyder, Kirpich, Mockus, and SCS were employed. Annual maximum flow data were used for the statistical methods, while 50- and 100-year rainfall records were used as input for the synthetic methods. The findings indicate that the Log-Pearson Type III distribution yielded the most reliable results among the statistical methods, while the Kirpich method was the most effective among the synthetic approaches

https://doi.org/10.36937/cebel.2025.1991