Mediaspace scheduled maintenance: Aug 25, 2026 07:00 - 12:00 AM. During this time, videos will be temporarily unavailable. Check status updates.

Lecture

Advanced Design of Concrete Structures

Description

This lecture covers the advanced design of concrete structures, focusing on the improvement of precast sections, post-tensioned precast elements, segmental bridges, and changes in cross-sections. The presentation discusses the structural features, materials used, advantages, disadvantages, and possible improvements of a specific project involving railway bridges. It explores the use of precast pretensioned U-beams, deviators, and in-situ slab elements. The lecture emphasizes the importance of providing continuity between adjacent spans for better slenderness, durability, and efficiency in construction processes.

This video is available exclusively on Mediaspace for a restricted audience. Please log in to MediaSpace to access it if you have the necessary permissions.

Watch on Mediaspace

Official source

Ontological neighbourhood

Chemical engineering

Materials science: Concrete

Related concepts (32)

Precast concrete

Precast concrete is a construction product produced by casting concrete in a reusable mold or "form" which is then cured in a controlled environment, transported to the construction site and maneuvered into place; examples include precast beams, and wall panels for tilt up construction. In contrast, cast-in-place concrete is poured into site-specific forms and cured on site. Recently lightweight expanded polystyrene foam is being used as the cores of precast wall panels, saving weight and increasing thermal insulation.

Prestressed concrete

Prestressed concrete is a form of concrete used in construction. It is substantially "prestressed" (compressed) during production, in a manner that strengthens it against tensile forces which will exist when in service. This compression is produced by the tensioning of high-strength "tendons" located within or adjacent to the concrete and is done to improve the performance of the concrete in service. Tendons may consist of single wires, multi-wire strands or threaded bars that are most commonly made from high-tensile steels, carbon fiber or aramid fiber.

Concrete

Concrete is a composite material composed of aggregate bonded together with a fluid cement that cures over time. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminium combined. When aggregate is mixed with dry Portland cement and water, the mixture forms a fluid slurry that is easily poured and molded into shape.

Reinforced concrete

Reinforced concrete, also called ferroconcrete, is a composite material in which concrete's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel bars (rebar) and is usually embedded passively in the concrete before the concrete sets. However, post-tensioning is also employed as a technique to reinforce the concrete. In terms of volume used annually, it is one of the most common engineering materials.

Types of concrete

Concrete is produced in a variety of compositions, finishes and performance characteristics to meet a wide range of needs. Modern concrete mix designs can be complex. The choice of a concrete mix depends on the need of the project both in terms of strength and appearance and in relation to local legislation and building codes. The design begins by determining the requirements of the concrete. These requirements take into consideration the weather conditions that the concrete will be exposed to in service, and the required design strength.

Related lectures (35)

Structural Design of Footbridges

Explores the structural design of footbridges, highlighting key considerations and challenges.

Structural Engineering Insights: A Tribute to Innovation

Provides an overview of advancements in structural engineering, focusing on concrete structures and the critical shear crack theory.

Stability of Piles and Systems

Covers the stability of piles and systems, including design considerations for concrete bridge slabs.

Concrete Bridges: Design and Construction

Covers the design and construction of concrete bridges, focusing on integral bridges and potential problems.

Concrete and Sustainability: Challenges in Structural Engineering