A more sustainable material to reinforce concrete structures
The next generation of ultra high-performance fiber-reinforced concrete (UHPFRC) has just been created at EPFL. The new material will be used to …
The next generation of ultra high-performance fiber-reinforced concrete (UHPFRC) has just been created at EPFL. The new material will be used to …
The structural system employed for Burj Khalifa can be called as the Buttressed Core System. The whole system is constructed by using high performance concrete wall. Each wing buttresses the other through a hexagonal central core as shown in figure-2.
UHPC Defined. Ultra High Performance Concrete (UHPC) is a new class of concrete that has been developed in recent decades for its exceptional properties of strength and durability. This high performance concrete can be utilized in structural rehabilitation and accelerated bridge construction in addition to several other applications.
National Precast Concrete Association • precast 3 INTRODUCTION A s a material on the leading edge of concrete innovation, ultra high performance concrete (UHPC) provides a new technology to expand a precaster's business with new products and solutions. The material's combination of superior
STRUCTURAL DESIGN OF HIGH-RISE BUILDINGS ERIK HALLEBRAND and WILHELM JAKOBSSON STRUCTURAL DESIGN OF ... of new inventions such as the safe elevator in 1853 [27] and the telephone in 1876 ... these are the use of concrete or mortar. Wet connections are for example, mortar
The structural system of burj khakifa was a new system developed for the building. The system is called 'butressed core' . In this system the lateral loads and gravity loads are shared equally between the interior core and perimeter structural systems linked by the link beam which makes the structure super strong. 21.
struction. These multi-performance structural systems, in contrast to high-performance struc-tural materials that aim to only improve structural properties, offer considerable and largely un-tapped opportunities to improve new and existing buildings while potentially lowering construction costs.
The structural system can be described as a "buttressed" core (Figures 1, 2 and 3). Each wing, with its own high performance concrete corridor walls and perimeter columns, buttresses the others via a six-sided central core, or hexagonal hub. The result is a tower that is extremely stiff laterally and torsionally.
The main objective of 1.054/1.541 is to provide students with a rational basis of the design of reinforced concrete members and structures through advanced understanding of material and structural behavior. This course is offered to undergraduate (1.054) and graduate students (1.541). Topics covered include: Strength and Deformation of Concrete under Various States of Stress; Failure Criteria ...
Concrete isn't always the right choice of structural systems—but when it is, it can significantly reduce initial costs and provide the owner a high-quality, high …
Building construction using conventional reinforced concrete construction, after 30 years of practice and development, is still NOT seamless here in Hong Kong ! Innovative structural engineering design is needed to develop new structural systems for MiC highrise buildings using high performance materials to delivery buildings of same quality. 8
1. Introduction. Ultra-high-performance concrete (UHPC) has been developed in many countries,,,, and many new studies have been performed in recent years.Because UHPC has a very low water-to-binder ratio (W/B), high-fineness admixtures, and high volume contents of steel fibers (mostly 2% by volume), it exhibits excellent performance in terms of mechanical properties …
If the concrete slabs remain exposed overhead, then the typical office floor will reach over 11 feet high, a dramatic increase from the 9-foot heights traditionally associated with Class-A office buildings. Using ultra-thin concrete instead of steel maximizes perimeter glass, achieves more daylight, and supports energy efficient HVAC systems.
Reactive powder concrete is extremely workable, durable and yields ultra-high strengths without using coarse aggregates. Reaching compressive strengths of 30,000 pounds per square inch (psi), this new-age concrete also has tensile strength with the inclusion of steel and synthetic fibers. Read more on reactive powder concrete.
For nearly 50 years, High Concrete Group has been providing the highest quality building components for use in the most challenging construction projects. Construction professionals choose High Concrete — one of the top precast companies in the nation — for all types of structures, from parking garages and commercial buildings to government ...
Ultra-high performance concrete has a discontinuous pore structure that reduces liquid ingress, significantly enhancing durability compared to conventional and high-performance concretes. UHPC is being considered for use in a wide variety of highway infrastructure applications. The high compressive and tensile strengths allow for the redesign ...
The tower's structural system consists of reinforced concrete construction from foundation to Level 156; above Level 156 is predominantly the spire, consisting of a structural steel braced frame system. The tower's structural system is described as a "buttressed core", which consists of high performance concrete wall construction.
High-performance concrete (HPC) is concrete that has been designed to be more durable and, if necessary, stronger than conventional concrete. HPC mixtures are composed of essentially the same materials as conventional concrete mixtures, but the proportions are designed, or engineered, to provide the strength and durability needed for the structural and environmental …
This can be done by using a new, improved mechanical air-entraining admixture or concrete containing air cells or voids throughout its volume. A Specified Density Concrete [SDC] called High Strength Lightweight Structural Cellular Concrete or High-Performance Cellular Concrete [HPCC] / Air-Entrained Aggregate Concrete.
1. Introduction. Ultra-high-performance concrete (UHPC) has been developed in many countries,,,, and many new studies have been performed in recent years.Because UHPC has a very low water-to-binder ratio (W/B), high-fineness admixtures, and high volume contents of steel fibers (mostly 2% by volume), it exhibits excellent performance in terms of mechanical properties …
Structural Design of an Ultra High-rise Building Using Concrete Filled Tubular Column with Ultra High Strength Materials77 range, and under the Level 3 earthquakes some beams become plastic, with maximum story plasticity ratio of 1.264. 4. Ultra High Strength CFT Columns 4.1. Use of ultra high strength CFT columns in the building
These new manufacturing processes allowed concrete masonry to be used in engineered structural systems such as multistory load-bearing structures. In the late 1940's, one of the first examples of engineered multistory construction was used by Professor Paul Haller in Switzerland.
2. KONE UltraRope for high rise buildings. KONE UltraRope is a new carbon-fiber hoisting technology, the weight and bending advantages of which effectively double the distance an elevator can travel in a single shaft – to 1,000 m (1 km). Comprised of a carbon fiber core and an epoxy-based high-friction coating, KONE UltraRope is extremely ...
UHPC is a relatively new generation of cementitious material with very high strength, ductility and durability [].Fig. 1 shows that, UHPC strengthened with fiber can be treated as a combination of three concrete technologies of self-compacting concrete (SCC), fiber reinforced concrete (FRC) and high-performance concrete (HPC) [].French interim recommendations (AFGC 2002) [] defined …
A major advantage of concrete construction for high-rise buildings is the material's inherent properties of heaviness and mass, which create lateral stiffness, or resistance to horizontal movement. Occupants of concrete towers are less able to perceive building motion than occupants of comparable tall buildings with non-concrete structural systems.
Decked Bridge I-Beams. Figure 5 shows a conventional bridge system, using an NU (Nebraska University) girder. Eight-foot-deep beams spaced 9 feet apart with a composite cast-in-place deck can span up to 180 feet. A UHPC-decked I-beam system with the same total superstructure depth and spacing would have a maximum possible span of 265 feet while using a fraction of the total concrete …
Steel and concrete structural systems are a type of composite system. This type of system can combine structural steel framing with concrete tubes or concrete shear walls with a steel frame. This system is frequently used to construct tall buildings, such as high-rises. The steel and concrete can resist stress from wind and gravity.
Nowadays, high-performance concrete (HPC) and ultra-high-performance concrete (UHPC) are ranked among advanced concrete technologies. The application of the mentioned advanced technologies may have potential to improve the construction efficiency from several points of view. For instance, reducing of construction time and construction material, construction quality improving, …
activities. The experience collected in last decades identified structural typologies as space structures, cable structures, membrane structures and new - under tension - efficient materials which combination deals with lightweight structural systems, as the state of art on long span structural design.
The 828 m tall Burj Khalifa dominates the Dubai skyline and is the world's tallest structure by far – the first 586 m of the building is constructed from high-performance reinforced concrete ...