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Wall collapses in Traverse City: 4 people injured

A brick wall collapsed at a construction site at Traverse City, causing four injuries, one of them very severe. The accident occurred around 9 a.m. on Tuesday 19th of May, when one of the three struc...

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Engineering concepts behind the stability of famous masonry domes confirmed

Research conducted at Princeton University and the University of Bergamo unearths the technical secrets behind famous self-supporting masonry domes such as the dome of the duomo of Maria del Fiore in...

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Instant monitoring of inter-story drifts via laser sensors

Real time record of seismic displacements between floors of multistory buildings is now possible thanks to light-sensitive optical sensors. The new technology is called Discrete Diode Position Sensor...

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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...

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Concrete “waves” formed at Humen Bridge in China

On Tuesday May 5th, the top of the Humen Bridge, Southern China’s suspension bridge, oscillated like the surface of the ocean. Strong winds are responsible for the unusual behavior. At the time, the...

Industry Section

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KELLER keeps running projects safely despite the COVID-19 outburst

Keller teams across the world are doing everything they can to mitigate the impact of the coronavirus outbreak and keep projects running safely wherever possible. In certain cases, Keller Colleagues...

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Follo Line Project Superb Documentary

A complex project which demonstrated KELLER collaboration and expertise at its best, Follo Line saw three different business units (and nearly 70 employees) work together to implement numerous ground...

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Keller helps Neste - a global leader in renewable products- towards a greener future

As the world looks to meet growing demand for low-carbon energy sources, Neste – a global leader in renewable products – is investing S$2.2 billion (€1.4 billion) to increase biofuel production in Si...

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Oil, gas and chemical solutions by Keller

Planned LNG (liquefied natural gas) storage facilities may require ground improvement to increase soil bearing capacity and control settlement, deep foundations to transfer loads to competent bearing...

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Keller Poland participated in the expansion of one of Europe’s busiest ports

Keller Poland has completed its first marine combi-wall project in Gdansk Port, Poland, helping with the expansion of one of Europe's busiest ports. Gdansk port on the southern side of the Baltic Sea...

Editor's Pick

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India demolishes skyscrapers that infringed environmental regulations

Officials decided to demolish 2 skyscrapers in India as they did not comply with the existing environmental codes. The skyscrapers were located in the municipality of Maradu, in the Kerala state of...

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Education

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Calculate the variation in length of the rod

The rod of the picture is loaded with the force 2P which is uniformly distributed on Section D where applied. If the material of the rod is homogenous with Elastic Modulus E find the variation in len...

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Allowable shear force of the girder

Calculate the maximum allowable shear force Vmax for the girder. The welded steel girder is having the cross section shown in the figure. It is fabricated of two 500 mm x 50 mm flange plates and a 50...

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Average shear stress in pressure vessel

A pressure-vessel head is fabricated by gluing the circular plate to the end of the vessel. If the vessel sustains an internal pressure of 500 kPa, determine the average shear stress in the glue. S...

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Temperature Change

The beam is fixed at end B and free at end A. It is loaded at end A with the concentrated force 4F. At the same time there is a temperature change ΔT. Calculate the length change Δx. (Modulus of elast...

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Calculate angular velocity, angular acceleration

The angular velocity of the circle is defined by the equation ω=3t2+2 rad/sec where t in sec. Determine the magnitudes of the velocity and acceleration of point B on the circle of 1m diameter when t=1...

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How to calculate yield strength

The stress-strain diagram for a steel rod is shown and can be described by the equation ε=0.20(1e-06)σ+0.20(1e-12)σ3 where s in kPa. Determine the yield strength assuming a 0.5% offset.  Solut...

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Calculate the Maximum Shear Stress

A steel bar with diameter d = 14 mm is subjected to a tensile load P = 10 kN (see figure). (a) What is the maximum normal stress σmax in the bar? (b) What is the maximum shear stress τmax? Solution...

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...