Research Article
Improved Correlation Models for Optimum Moisture Content Based on Atterberg Limits
Mahmuda Khanom*
,
Md. Abdul Alim
Issue:
Volume 13, Issue 5, October 2025
Pages:
257-264
Received:
11 August 2025
Accepted:
25 August 2025
Published:
10 October 2025
Abstract: The compaction characteristics of soil are fundamental to the stability and performance of a wide range of geotechnical engineering applications. Compaction, a mechanical process involving the application of energy to increase soil density, fulfills multiple essential purposes: minimizing structural settlement under load, reducing soil permeability to mitigate liquefaction risks, and enhancing shear strength. It is particularly vital in hydraulic structures such as dams, where water retention is essential. However, conducting standard laboratory compaction tests, such as the Proctor test, is often expensive and time-consuming. In contrast, the determination of Atterberg limits, namely Liquid Limit (LL), Plastic Limit (PL), and Plasticity Index (PI) is relatively quick, simple, and cost-effective. Establishing correlations between these Atterberg limits and compaction characteristics, particularly Optimum Moisture Content (OMC), may offer a practical alternative for predicting compaction behavior. This study investigates such correlations using five types of fine-grained clay soils collected from various locations within the Rajshahi Division of Bangladesh. Through regression analysis, four predictive relationships between OMC and the Atterberg limits are proposed, highlighting the potential to estimate OMC without relying solely on traditional compaction tests.
Abstract: The compaction characteristics of soil are fundamental to the stability and performance of a wide range of geotechnical engineering applications. Compaction, a mechanical process involving the application of energy to increase soil density, fulfills multiple essential purposes: minimizing structural settlement under load, reducing soil permeability...
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Research Article
Numerical Investigation on Seismic Strengthening of Composite Two Way Beam- Column Joint
Issue:
Volume 13, Issue 5, October 2025
Pages:
265-274
Received:
9 May 2025
Accepted:
26 September 2025
Published:
22 October 2025
DOI:
10.11648/j.ajce.20251305.12
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Abstract: Beam-column joints are crucial structural components to ensure the overall stability of composite framed structures subjected to seismic loads. Many more research efforts have been dedicated to enhance the seismic behavior of beam-column joints. Due to limited research on composite beam-column joint, the effect of some parameters is not well documented on the current building codes. A total of eleven specimens including a control specimen were simulated by considering the effects of doubler plate thickness, haunch plate thickness and haunch configuration in a numerical research conducted using ABAQUS/Standard to investigate the performance of composite steel beam column joint under cyclic loading. Experimental results from other researchers validated the accuracy of the numerical model. Finite-element analysis results showed use of higher thickness doubler plate with better haunch thickness increased the load carrying capacity by 45.02% and 34.02% respectively. Moreover, using appropriate haunch configuration along the flange and beam column with haunch support improved the load carrying capacity and seismic resistance of the joint. With use of higher doubler plate and haunch thickness the stiffness and energy dissipation capacity of the joint showed improved result. These results verified that the composite beam column joint with the aid of doubler plate thickness, haunch plate thickness, better haunch configuration and supporting the joint with haunch helps the beam column joint to withstand the seismic action better.
Abstract: Beam-column joints are crucial structural components to ensure the overall stability of composite framed structures subjected to seismic loads. Many more research efforts have been dedicated to enhance the seismic behavior of beam-column joints. Due to limited research on composite beam-column joint, the effect of some parameters is not well docume...
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