Curious Civil Engineer

 In construction projects, claims and variations are usually misunderstood. Both of them can impact the contract price and the project management. However, claim and variation are not the same. In FIDIC, the difference between them is significantly important for the contractors. Under FIDIC contracts, understanding the difference is very important for contractors, consultants, engineers, and employers because using the wrong procedure may lead to loss of entitlement or disputes. 1-Variation: Variation is an official change of the original scope of work under the contract. This means that the employer or the Engineer requests the contractor to execute works that are not as per the original agreement.  This can include: 1-Adding new works 2-ommiting part of the original works 3-changing of quantities 4-changing the specification and quality 5-changing levels, dimensions, and positions  6-changing the work sequences or timing 7-changing the design details, depending on the F...

The presence of a reliable road network plays a significant role in the economic growth of any country. Roads are a key factor in the economic development of a nation, facilitating the movement of people and goods. A reliable road network ensures smooth and safe transportation, promoting efficiency in trade and commerce. In contrast, the absence of such infrastructure can delay and hinder the movement of goods, severely impacting economic progress. Global spending on infrastructure projects is projected to increase from approximately 4trillionperyearin2012tonearly9 trillion per year by 2025. This significant rise in investment highlights the critical importance of infrastructure, including road networks, in supporting economic growth. The construction of roads involves various stages before, during, and after the construction process. Poor quality assurance (QA) and quality control (QC) measures during any stage can result in low-quality roads incapable of sustaining expected traffic l...

The economic growth of any country relies on many factors, such as natural resources, technology, manpower, regulations, and infrastructure. Infrastructure is essential for country development. Road networks are part of the infrastructure of any country. The presence of a reliable road network will facilitate the shipping of goods, which will save time and money and contribute to economic growth. A road network is considered reliable when it reduces the journey time, provides the best routes, properly covers a country or area, reduces the delay of public transportation, contributes to economic growth, and ensures a smooth ride. Building a high-quality road pavement that meets the needs of road users and ensures smooth riding requires good planning, design, and construction of the pavement. The construction of durable pavement can be attained through the collaboration of reliable design, selecting high-quality and suitable raw materials, appropriate asphalt mix design, and the implement...

This paper critically evaluates the performance of several AI models in structural analysis. The capability of different AI systems, including ChatGPT, DeepSeek, Gemini, and Perplexity, was assessed using a series of beam problems with varying degrees of static indeterminacy and structural complexity. The outputs were benchmarked against classical analytical methods, namely the force method and slope-deflection method, as well as numerical results obtained from structural analysis software (SAP2000). The results indicate that AI models can produce reasonably accurate results for statically determinate beams and systems with low levels of indeterminacy. However, their accuracy decreases significantly as structural complexity increases, with notable discrepancies observed in highly indeterminate systems. The study concludes that current AI models lack the effectiveness required for reliable structural analysis of complex systems and should not be used by engineers as the obtained result...

Bracing is important part of steel structures. Bracing is added to increase the structure strength and increase structure stability when subjected to lateral loads such as wind load, earthquake load and others. In steel structures, columns and beams resist different loads such as axial loads, shear load, flexural stresses, etc. But without sufficient bracing structure will not be stable against lateral load and deformation can be large and beyond the acceptable. Therefore, the bracing is added to  significantly reduce the structure deformation due to external loads.  The main purpose of bracing is to ensure the structure lateral stability. Without bracing, structure will excessively sway. The structure significant deformation due to sway can result in damaging several elements of the structure such as connection, walls, cladding and others.  Bracing elements usually fabricated from steel sections such as angles, channels, rod, hollow sections or I sections. The bracing is...