Heberto Castillo Tridilosa.pdf
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Heberto Castillo Tridilosa: A Revolutionary Structural System for Buildings and Bridges
Heberto Castillo Tridilosa is a three-dimensional structural system that combines steel and concrete to create efficient and lightweight slabs for buildings and bridges. It was invented by Heberto Castillo MartÃnez, a Mexican civil engineer and political activist, in 1966. In this article, we will explore the history, features, advantages and applications of this innovative system.
Who was Heberto Castillo MartÃnez
Heberto Castillo MartÃnez (1928-1997) was a prominent figure in Mexican engineering and politics. He was born in IxhuatlÃn de Madero, Veracruz, and received a bachelor's degree in civil engineering from the National Autonomous University of Mexico (UNAM). He taught several courses at the UNAM and at the National Polytechnic Institute, wrote several textbooks and invented the tridilosa[^1^].
He was also a political activist and leader of several left-wing parties, such as the Mexican Workers' Party (PMT), the Mexican Socialist Party (PMS) and the Party of the Democratic Revolution (PRD). He was involved in many workers' rights struggles and was imprisoned by the federal government in the infamous Lecumberri Penitentiary. He was one of the first among leading left-wing politicians to express dismay at the dictatorial nature of Soviet-bloc governments, starting a movement towards a social democracy-based left wing and away from a Moscow-based left leaning opposition in Mexico[^1^]. He died on April 5, 1997, in Mexico City and received the Belisario DomÃnguez Medal of Honor (postmortem) that same year.
What is tridilosa
Tridilosa is a three-dimensional structural system that consists of a sandwich of reinforced concrete and steel. The concrete takes the compression stresses caused by bending, which can be above or below depending on the moment distribution; the steel takes the tension stresses caused by the same bending; the torsion is taken by the transverse reinforcement; and the shear is taken by the spatial diagonals (not contained in vertical planes) of different structural steel profiles, which work under pure tension and compression[^2^].
The main difference with conventional reinforced concrete slabs is that tridilosa does not contain filler concrete, like traditional slabs. The concrete of the compression chord works under a constant stress in a rectangular section, unlike the concrete in a slab or beam where it varies linearly depending on the depth of the point where the stress is measured. This saves about 66% of concrete[^2^].
What are the advantages of tridilosa
Tridilosa has many advantages over other structural systems, such as:
It reduces dead weight and material consumption, resulting in lower costs and environmental impact.
It allows for longer spans and greater heights without intermediate supports, creating more open spaces and architectural flexibility.
It increases seismic resistance and ductility due to its three-dimensional configuration and energy dissipation capacity.
It simplifies construction processes and reduces labor time due to its prefabricated modules that can be easily assembled on site.
It improves thermal and acoustic insulation due to its hollow spaces that can be filled with insulating materials.
Where has tridilosa been used
Tridilosa has been used in various types of structures, such as buildings, bridges, domes, industrial warehouses and even floating shipyards. Some examples are:
The World Trade Center Mexico City, which has a tridilosa roof that covers an area of 25,000 m with spans up to 60 m[^3^].
The Torre Mayor Mexico City, which has a tridilosa floor system that supports loads up to 1.5 tons/m with spans up to 16 m[^3^].
The Puente de la Unidad Monterrey, which has a tridilosa deck that spans 300 ec8f644aee