Civil Engineering Journal

Energy geostructures rely on efficient heat exchange between buried structural elements and the surrounding ground, the performance of which is governed by the soil’s moisture-dependent thermal behavior. This study experimentally evaluates how the moisture state of silty-sand soil controls heat dissipation around a buried source, comparing dry and fully saturated conditions. Two model-scale tests…

This study evaluates whether a newly constructed mixed-use industrial–administrative facility in Kosovo, with an approximate gross area of 9,000 m², achieves near-zero energy building (NZEB) status under Kosovo’s Energy Performance of Buildings framework and quantifies its LEED v4 BD+C certification outcome. The analysis integrates iSBEM operational-energy simulation, PVsyst v7.2.11 photovoltaic …

This study experimentally investigates the structural behavior of steel–concrete composite beams containing large circular web openings under monotonic four-point bending. The objective is to evaluate how the presence, number, location, and spacing of 120 mm circular openings affect ultimate load capacity, initial stiffness, ductility, and overall failure response. Seven half-scale composite beam…

Self-compacting concrete (SCC) has been increasingly applied in complex reinforced concrete structures due to its high flowability and ability to achieve proper compaction without mechanical vibration. However, the structural behavior of SCC flat slabs with openings, particularly in the vicinity of columns where stress concentrations occur, requires further investigation. This study aims to evalu…

This research presents the results of a numerical simulation conducted using ABAQUS/CAE finite element software. The research sought to establish a simulation model capable of predicting the structural performance of pre-damaged perforated wide shallow reinforced concrete (RC) beams repaired with different Carbon Fiber Reinforced Polymer (CFRP) composites. Numerous investigations on CFRP composit…

The ecological equilibrium and structural integrity of open waterways are significantly influenced by the effective management of sediment within hydraulic systems. Although conventional experimental testing methods are precise, they are frequently time-consuming and expensive. This study describes a unique computational technique that uses Artificial Neural Networks (ANNs) to anticipate the Sedi…

This study develops a data-driven, risk-sensitive decision-support model. It determines optimal Advanced Warning Distances (AWD) for highway work zones, replacing fixed-value guidelines that ignore site-specific risks. Research integrates microscopic traffic simulation with a Hybrid Multi-Criteria Decision Analysis (MCDA) framework. Empirical data were collected from four and six - lane national …

In this study, a waste-based complex mineral-modifying additive (CMMA), composed of fly ash (FA), microsilica (MS), and metakaolin (MK) derived from industrial waste, was developed. Concrete specimens were produced using vibration (V), centrifugation (C), and vibro-centrifugation (VC) methods; CMMA was used for replacing cement in amounts ranging from 0% to 20%, with increments of 4%. The compres…

Tuned Mass Dampers (TMDs) are widely used as effective supplementary damping devices for mitigating structural vibrations in high-rise buildings. Previous studies have primarily focused on TMD systems integrated with viscous dampers. This study proposes a Multiple Viscoelastic-Connected Tuned Mass Damper (MVTMD) system, in which adjacent TMD units are linked through viscoelastic elements that sim…

Concrete is vulnerable to water and chloride ingress because of its porous structure and hydrophilic hydration products. To address the poor dispersion, hydration interference, and strength loss often associated with conventional hydrophobic modifiers, this study synthesized a nano-silicon hybrid hydrophobic polymer ester (HPE) based on C12 alkyl carboxylate groups. Unlike conventional nano-silic…

Dam sedimentation poses critical environmental and operational challenges worldwide, requiring sustainable valorisation strategies. This study investigates how post-calcination cooling protocols influence the pozzolanic performance of Ksob dam sediments (Algeria) as a partial cement replacement in self-compacting concrete (SCC). Raw sediments were calcined at 750 °C for 5 h and subjected to three…

Groundwater is considered as the primary source of drinking and agricultural supply for most residents in Mecca region. However, data indicates that groundwater restore is substantially lower than the consumption rate, which results in a reduction in the quality of water and decline in groundwater levels. This, in turn, has resulted in surface subsidence, causing problems in infrastructure. The m…

This study assesses the technical potential for wastewater heat recovery in Sofia and its contribution to domestic hot water supply and greenhouse gas reduction. Heat extraction locations were identified using temperature and flow data from the sewer network and the municipal wastewater treatment plant (WWTP) Kubratovo. Temperature thresholds were defined to ensure stable biological treatment ( ≥…

Predicting maximum temperatures is crucial across many fields and industries, including medicine, agriculture, energy, and climate research. Researchers have not treated the prediction of maximum temperatures under severe artificial data disturbance in much detail. So, it has not yet been understood. This research aims to integrate an artificial neural network (ANN) with the Guaranteed Convergenc…

Tsunami wave overtopping remains a major challenge for conventional vertical seawalls. Alternative seawall designs have therefore been proposed to address the overtopping issue. This study aims to conduct a staged numerical investigation to evaluate the hydraulic performance of solid, perforated, and integrated perforated–recurved seawall configurations. Tsunami-like waves were simulated in a num…

This study investigates the dynamic response of cylindrical steel lattice shell structures subjected to internal explosions and evaluates the effectiveness of explosion venting holes in mitigating structural damage. A detailed numerical model was developed using ANSYS/LS-DYNA and validated against experimental results. The comparison shows good agreement in both overpressure and structural strain…

Data-driven models offer the computational speed needed for rapid post-earthquake assessment, but their uncertainty estimates must be trustworthy to support safety decisions. This study reveals that Monte Carlo dropout uncertainty for RC frame seismic response prediction is severely miscalibrated: 95% prediction intervals capture only 46.6% of actual responses, meaning Immediate Occupancy assessm…

This study investigates the decoupling between bulk chemical composition and high-temperature viscoelastic recovery in rejuvenated asphalt binders. A pressurized aging vessel (PAV)-aged binder (AC60/70) was rejuvenated using pyrolytic bio-oils from sugarcane bagasse (SBO) and rice straw (RSO) at 5–20 wt% dosages. SARA fractionation, colloidal instability index (Ic), penetration, and multiple stre…

Crack-width control is a critical serviceability limit state (SLS) requirement in reinforced concrete (RC) structures, as excessive cracking can compromise durability and accelerate reinforcement corrosion. This study evaluates the accuracy of crack width prediction models within major international design standards. An experimental investigation was conducted on a RC beam subjected to four-point…

To facilitate accelerated bridge construction and reduce the cost of bridge design and construction, a cold-formed steel composite bridge girder has been suggested recently as an economical alternative. The new technology for the composite bridge girder includes a cold-formed steel plate and either a precast or cast-in-place reinforced concrete (RC) slab. Previous research on cold-formed steel co…