Keller's KELLER Grouting and Ground Improvement Course begins at 01 Aug 2022
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6.1-magnitude earthquake in Afghanistan: At least 1,000 fatalities and 1,500 injuries

A powerful earthquake has killed at least 1,000 people and injured 1,500 in eastern Afghanistan, an official of the ruling Taliban told the BBC. The quake struck shortly after 01:30 (21:00 GMT Tuesda...

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Cairo, Egypt: Building collapse, at least six fatalities

A five-story building in Egypt’s capital Cairo collapsed in the early hours of Friday killing at least six people, Al Arabiya’s correspondent reported. The incident also resulted in the partial colla...

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Shoring project at Base Mine Lake

As a previous mine pit and tailings pond, the Base Mine Lake has residual bitumen forming two mats on the lake floor. Keller designed and installed a shoring solution to create a new dock area for dr...

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Assam, India: Part of bridge collapses in Baksa district after heavy rains

Part of a bridge collapsed in Assam's Baksa district on Wednesday due to incessant rainfall and an increase in the water level of the Dihing river. In a video posted by news agency ANI, people can be...

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Keller North America announces new branch and area managers

Ray Franz was promoted to Area Manager of Northern California. With over 30 years of experience in geotechnical consulting and specialty construction, Ray has worked with micropiles, auger cast piles,...

Industry Section

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Alameda Marina Ground Improvement Project Wins the 2022 CalGeo Outstanding Project award

Keller’s ground improvement work wins the 2022 CalGeo Outstanding Project award. In 1916, marshlands along the Oakland Estuary in San Francisco were filled in to create the Alameda Marina. During W...

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Miami 6-Arch Signature Bridge Auger Cast Pile Solution

Keller installs auger cast piles for the first FDOT project in over half a century, supporting a new bridge in Miami. The project As part of road enhancements along the I-395 string from the Midtow...

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Osito Canyon Landslide Stabilization Project

Slide events are common in Osito Canyon in the Angeles National Forest. During heavy rains in 2005 , an approximately 900 ft long landslide occurred along the historic Old Ridge Route overlooking the...

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Fluid Retaining Structure Design Using STAAD.Pro Advanced

Over the years since STAAD first made an appearance as a general structural analysis and design tool, it has provided more benefits for structural engineers working on structural steel-framed structu...

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Concrete Design Workflow for Slabs and Foundations Using STAAD.Pro

STAAD.Pro is generally associated with the analysis and design of steel structures. However, add-on components that are available with the program make it an efficient and powerful tool for concrete...

Editor's Pick

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Researchers develop new ultra-resistant and self-repairing concrete materials

New ultra-resistant and self-repairing concrete materials have been designed by a team from the Universitat Politècnica de València (UPV) and the Politecnico di Milano. In cracking situations, the ne...

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Education

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Beams: maximum moment

Find the maximum moment of the above beam which is subjected to triangular vertical load. SOLUTION: ΣΜΒ = 0 → ΑΥ –(1/2)ql(l/3)=0 → ΑΥ = (1/6)ql ΣFY = 0 → ql/6 + BΥ –(1/2)ql=0 → BΥ = (1/3)ql Assum...

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Column in buckling

Consider a universal column 200mm x 200mm with a flange thickness of 10mm and web thickness of 7mm. The height of the column, which is fixed in concrete at its base, is 10m and the load is applied...

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Maximum Factored Vertical Shear

A simply supported beam (Figure) with a span of L=20ft is subjected to a uniform service load of 1200 lb/ft, including self weight, and a live load of 900 lb/ft. Determine the maximum factored...

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Flexular Crack in Concrete Beam

For the simply supported beam of Figure 1, determine the uniformly distributed load, q, at which the flexural crack forms. The beam has a length L=7m, and f’c=25Mpa. Figure 1: Cross-section of Con...

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Calculate the vertical deflection of a beam

Calculate the vertical deflection of the beam (magnitude and direction) at the midpoint of the central span (point A) Solution Use virtual work method: Virtual Structure From Equilibrium: Shea...

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Truss vs Cable

Truss and cable elements are defined by their ability to carry solely axial loads. Nonetheless, since cables have no stiffness when loaded in compression, they function only in tension. Moreover,...

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Spring Assemblies in Series/Parallel: Two Springs in Series

Based on Figure 1, we get: where: In matrix form, the above can be re-written as: Example Figure 2: Two Springs in Series - Example  Calculate k1, δ2, and f3. Solution Ba...

Books

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Structural Engineering Solved Problems

Structural Engineering Solved Problems contains 100 practice problems representing a broad range of topics on the Structural Engineering (SE) and Civil PE exams. Each problem provides an opportunity t...

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Structural Depth Reference Manual for the Civil PE Exam, Fourth Edition

The Structural Depth Reference Manual prepares you for the structural depth section of the Civil PE exam. It provides a concise, yet comprehensive review of the structural depth section exam topics an...

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Structural Depth Practice Exams for the Civil PE Exam

Structural Depth Practice Exams contains two 40-problem, multiple-choice exams consistent with the NCEES Civil PE structural depth exam's format and specifications. Like the actual exam, the problems...