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Wednesday, October 28, 2020

Ubani Obinna

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A dynamic civil engineer with vast experience in research, design, and construction of civil engineering infrastructures. He is a member of the Nigerian Society of Engineers. Reach him at ubani@structville.com

Building collapse – Have you exhausted your factors of safety?

The aftermath of any building collapse is usually horrendous, and the experience is an ugly one for everybody concerned. Human lives might...

Cement Standards and Applications in Nigeria

Cement is one of the most popular construction materials in Nigeria, and has been extensively utilised in civil engineering works such as building construction,...

Can you identify the cause of failure of this building?

Structural failure is real, and it is the duty of structural engineers to identify all possible modes of failure in a structure,...

Modelling and Analysis of Imperfections in Portal Frames

Equivalent horizontal forces (EHF) are not strictly actions, but are forces that are applied to a frame in combination with other actions...

Analysis of Box Girder Bridges Using Staad Pro

A box girder is formed when two web plates are joined by a common flange at both the top and the bottom....

Procedures in Setting out of Reinforced Concrete Columns

Columns are critical structural elements used in transmitting superstructure load to the substructure. As a result, their stability and structural resistance is...

How to Achieve Grade 25 Concrete on Site

The characteristic compressive strength of concrete to be used in construction is usually specified in the working drawings, design calculation sheets, and...

Structural Design of Ribbed Slabs

Ribbed slab is a type of reinforced concrete slabs in which some of the volume of concrete in the tension zone is...

Construction of Underground Water/Septic Tanks by Sinking

Underground water retaining structures have wide applications in residential, commercial, and industrial buildings. According to Lagos State Development Laws (2005), a...

Calculation of Natural Frequency of Multi-Storey Frames

A multi-storey building can develop lateral vibrations in the two principal directions and torsional vibration around its vertical shear centre axis. The natural frequency...

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Beams are horizontal structural elements designed to carry lateral loads. When they are inclined or slanted, they are referred to as...

Reinforced Concrete Structures

Concrete is arguably the most widely used construction material in the world. It is produced from a mixture of cement, sand,...

Aerodynamics of High-Rise Buildings

To improve the safety and serviceability of super-tall buildings in strong winds, aerodynamic optimization of building shapes is considered to be...

Negative Skin Friction in Piles

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