Category: civil
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Flexural Capacity Prediction of Composite RC Members Strengthened with UHPC Based on Existing Design Models
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Ultra-high-performance concrete (UHPC), a new generation of cementitious materials with very high strength, ductility, and durability, has been used for enhancing reinforced concrete (RC) structures as a strengthening material. The structural performance of RC members strengthened by UHPC or UHPC-concrete composite members is significantly improved. However, there are few methods for predicting the capacity of…
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Finite Element Modelling to Predict the Flexural Behaviour of Ultra-high Performance Concrete Members
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This paper presents a finite element (FE) modelling to predict the behaviour of ultra-high performance concrete (UHPC) members under static flexural loading. A plasticity-based constitutive model for concrete and an implicit solver in LS-DYNA were adopted in the numerical simulation. Experimental data for 21 UHPC specimens tested in the present study and in previous works…
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Numerical Model for Predicting the Structural Response of Composite UHPC–concrete Members Considering the Bond Strength at the Interface
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In this study, an improved finite element (FE) model was developed for the prediction of the structural behaviour of reinforced concrete members strengthened with ultrahigh-performance concrete (UHPC). A concrete damage model and an implicit solver in LS-DYNA were adopted in the numerical simulation. The model was calibrated and validated using experimental data. Accurately representing the…
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Implementation of DC Motor Position and Speed Control using LQR Controller
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This project focuses on how to design and implement LQR Controller for con-trolling speed and position of DC motor by using Arduino microcontroller as central pro-cessing core. The close loop method is used for design and experiment. In this project, the hardware interconnected is used to improve the experiment such as 50w DC motor, Ar-duino…
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Development of Speech Recognition System Based on CMUSphinx for Khmer Language
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This paper described the process of creating and testing the offline Khmer speech recognition system. This system was created using CMUSphinx with the noise reduction of training audio database, including 85 speakers and 157 words selected from the Khmer language. To evaluate the speech recognition accuracy, there were 100 Khmer transcripts randomly created from the…
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Repair and Strengthening Techniques for RC Structures
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An adequate strength capacity for repair and strengthening of existing reinforced concrete (RC) structures has emerged as a big challenge for civil engineers. There are design guidelines such as ACI 440 for externally carbon fiber reinforced polymers (CFRP) but for concrete jacketing documents are very limited. This paper presents an overview of techniques for repair…
