Theory and design of Structures

Components of the foundation

Ribbed mat foundation layout and reinforcement detail.

Typical ribbed mat beam detail

👉 Nowdays ribbed mat is being used commonly in Ethiopia. 👉 Although many projects are available, let's see the ribbed mat foundation provided for Government Communication Affairs office building. 👇👇👇👇( the following pictures are taken from the project site and from the detailing drawings) @theoryanddesignofstructures

✔️ Ribbed mat 👉 It is becoming more popular this days owing to its ease in analysis and economy generated from decreased depth from punching ( no punching at all since beams are available between columns). 👉 Ribbed mat is an inverted solid slab system. Meaning the beams are upstanding and the load is acting in upward direction. 👉 usually used under one or more of the following conditions( p.c. varghese) : ✅ when there is an unsymmetrical load arrangement on columns ✅ when the column spacing are so large that the depth of the slab required for a flat slab( solid mat) mat becomes too large. ✅ when the foundation soil is not very uniform and we expect soft spots in the foundation area. 👉 The foundation consists slab and an upstanding beam. 👉 It is more rigid than solid mats and more efficient in distribution of loads( P.c varghese) . @theoryanddesignofstructures

Ribbed mat( beam and slab mat)

Solid mat ( uniform depth mat )

✔️ common foundation for buildings higher than G+10( depends on the subsoil character, May become lower than this if black cotton soil is encountered ) 👉Mat(raft) foundation ➡️Commonly two types of mat foundation are available. ✅Ribbed mat( beam and slab mat) ✅solid mat ( flat slab mat ) ➡️ Ribbed mat can be described simply as an inverted solid slab subjected to bearing pressure as load. ➡️ solid mat( uniform depth mat ) can be described as a flat slab subjected to bearing pressure as load. 👉pile foundation @theoryanddesignofstructures

〰Building under translational motion due to Earthquake. 〰 Japan! 〰It is like watching ETABS model animation.

#Addis_Ababa, bole #Curved_column

#Addis_Ababa #column_spaning_three_stories #tapering_column

✔️T beam analysis and design The theoretical aspects of T beam analysis and design is given in the pdf below. @theoryanddesignofstructures

👆👆👆👆 👉 It is not actual library, it is the facade of a parking garage. 👉The garage behind the " book" was constructed in 2006. 👉The facade was made to look like a book shelf based on community input. @theoryanddesignofstructures

Kansas city library's giant bookshelf

When you love your profession too much.

⬆️ The document contains slab design only. Beam on Axis B, which is designed as T Beam, is done in the pdf file below.

✔️ Flanged beams and one way slabs 👉The Pdf document provided below discusses everything you need to know about one way slab and flanged beams.