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Open Access Zeitschriften Artikel – Maschinenbau + Werkstoffe

Open Access Zeitschriften Artikel – Maschinenbau + Werkstoffe

Seismic Performance of RCS Frame with Slab: Numerical Simulation and Damage Analysis

  • Open Access
  • Research

While reinforced concrete column–steel beam (RCS) joints are well-studied, the seismic performance of RCS frames incorporating floor slabs remains inadequately explored. This study extends previous experimental findings, developing and validating …

Prediction of Compressive Strength for Recycled Rubber Aggregate Concrete Using Hybrid Machine-Learning Algorithms

  • Open Access
  • Research

This study presents an innovative approach to predicting the compressive strength (CS) of recycled rubberized concrete (RC) using advanced hybrid machine learning (ML) algorithms. The integration of recycled rubber in concrete offers significant …

Full Time-Domain Investigation of the Cracking Behavior of PVA Fiber-Reinforced High-Titanium Slag Concrete Using DIC Technology: Material Optimization, Performance Assessment, and Mechanism Analysis

  • Open Access
  • Research

The incorporation of high-titanium slag may reduce the crack resistance of concrete. To promote the recycling of industrial solid waste while maintaining structural integrity, this study investigates the use of high-titanium slag as a replacement …

Agriculture aid for harvesting and pruning

  • Open Access
  • Research

Farmers working on steep terrain need comfortable tools to improve their working conditions. Olive harvesting, which uses long unbalanced tools for reaching high branches, causes back pain. The posture of farmers, during harvesting operations, has …

Experimental and Machine Learning Strategies with SHAP and PDP Analysis of Self-Healing Characteristics of Bio-concrete Using Bacillus Cereus and Steel Slag

  • Open Access
  • Research

Self-healing concrete is a cement-based substance that can mend itself from a hairline crack. This experiment examines the effectiveness of the gram-positive cell bacteria Bacillus cereus on the self-healing characteristics of steel-slag …

Prediction of the Shear Strength of Steel-Fiber-Reinforced Concrete Using a Swarm Intelligence Based Extreme-Learning Machine

  • Open Access
  • Research

Steel fibers are added to concrete to enhance the shear strength of reinforced concrete beams and improve the post-cracking tensile strength of the material. However, creating an accurate simulation model to estimate the shear strength of …

Performance of Axially Compressed Reinforced Concrete Walls with Openings Strengthened Using Glass Fiber and Welded Wire Mesh Reinforced Engineered Cementitious Composites

  • Open Access
  • Research

This study explores the structural behavior of axially loaded reinforced concrete (RC) walls with openings strengthened using glass fiber (GF) or welded wire mesh (WWM) reinforced engineered cementitious composites (ECC). Eleven instrumented …

Design and development of a compact small-scale spherical gear mechanism with manipulability-based singularity avoidance

  • Open Access
  • Research

Multi-degree of freedom (DOF) robotic systems, particularly those with seven or more DOFs similar to the human arm, have the potential to significantly expand the functional range and versatility of robotic manipulators. The spherical gear …

An Approach to Determine the Prestress Loss in Unbonded Prestressed Composite Concrete Members

  • Open Access
  • Research

Based on the age-adjusted effective modulus method, this paper proposes a set of closed-form equations to estimate the prestress loss in prestressed composite concrete girders made up of a concrete girder and a cast-in-situ concrete deck slab with …

Dynamic Tensile Damage Constitutive Correction of Concrete Under Freeze–Thaw Cycle

  • Open Access
  • Research

To study the uniaxial dynamic tensile constitutive model of concrete under freeze–thaw conditions, the temperature field of concrete is modeled using finite element analysis software. The results are then imported into the thermal stress field as …

Development and Validation of an Improved Elastic Modulus Prediction Model for High-Strength Fly Ash Ceramsite Lightweight Aggregate Concrete

  • Open Access
  • Research

The large-scale application of high-performance fly ash based ceramsite is an effective way to achieve high-value utilization of solid waste such as fly ash. This study investigates high-strength fly ash ceramsite lightweight aggregate concrete …

Crack Propagation and Failure Analysis of Tunnel Lining Structures Under Several Conditions Using Peridynamic Method

  • Open Access
  • Research

Tunnel linings are critical components of underground infrastructure but are prone to cracking under complex, nonuniform loads. This study develops a nonlinear dual-parameter bond-based peridynamic (DB–PD) model to simulate crack initiation and …

Seismic Performance of Substandard Reinforced Concrete Roof T-joints Retrofitted with Prestressed Steel Plates

  • Open Access
  • Research

This study proposes an innovative and practical retrofitting method for reinforced concrete (RC) roof T-joints with substandard structural details. Retrofitting was performed by assembling steel plates with threaded rods on the roof T-joints …

Enhanced methodology of parameter diagram for system analysis and sensor integration in condition monitoring

  • Open Access
  • Originalarbeiten/Originals

This paper presents an enhanced methodology for parameter diagrams (P-Diagrams) designed to support system analysis and sensor integration in condition monitoring. Building on the foundations of the AIAG & VDA and Ford FMEA Handbooks, the proposed …

Investigation on Mechanical, Microstructural, and Sustainability Analysis of Ternary Blend Alkali-Activated Concrete

  • Open Access
  • Research

Efforts to enrich concrete performance and reduce environmental impact drive the development of alkali-activated concrete (AAC), which eliminates the need for cement. This study investigates the effect of fly ash (FA) and rice husk ash (RHA) on …

Micrographic Evaluation of Carbon Nanotube Cement Composites via Machine Learning and Convolutional Neural Networks

  • Open Access
  • Research

Carbon nanotube (CNT)/cement composite is a promising material for structural health monitoring, where CNT dispersion and content critically affect the conductive network for self-sensing. Still, a simple method to assess low CNT levels is …

Ground validation and dynamic simulation of a magnetic movable robot for space-deployable membrane structures

  • Open Access
  • Research

Deployable membrane structures are advantageous for enlarging space structures owing to their high storage efficiency and low weight. Robotic maintenance approaches are effective for the long-term use of constructed space structures. However …

Enhancement of Mechanical Properties and Strengthening Mechanism of Fully Recycled Aggregate Concrete via Calcium-Based Composite Mineralization

  • Open Access
  • Research

To achieve the dual goals of construction waste reutilization and carbon dioxide emission reduction, this study proposes a reinforced treatment method for recycled aggregates based on composite mineralization and further improves the secondary …

Tension Stiffening Effect of Reinforced Ultra-high-Performance Concrete Members in Tension with Thin Cover Thickness

  • Open Access
  • Research

This study experimentally investigates and analyzes the key factors influencing the tension stiffening effect of ultra-high-performance concrete (UHPC) with embedded reinforcement under thin cover conditions, focusing on the effective tensile …

Durability of Fly Ash and Limestone Concrete Under Combined Sulfate and Chloride Attack

  • Open Access
  • Research

This study investigates the long-term durability of concrete incorporating fly ash (FA) and limestone powder (LP) when subjected to simultaneous sulfate and chloride ion attack. Three concrete mixtures—100% ordinary portland cement (PC), 25% …