Recently, it has been suggested a new formula, confirmed with numerical simulations, which is going to make the prediction of the seismic resistance of reinforced concrete structures easier, based on its capacity to take up and disperse energy.
The director of this work, which has been recently published in the international journal Engineering Structures, is Professor Amadeo Benavent Climent, of the Department of Continuous Means and Theory of Structures of the University of Granada [http://www.ugr.es]. They intend to predict “in case of earthquake, the maximum amount of seismic energy this kind of structures could take up and disperse without risk of collapse”, Benavent Climent explains.
The higher this energy is, the higher the building´s resistance capacity will be. Such energy depends fundamentally on ductility, this is, on the ability of the structure to become twisted without breaking. The new formula allows to assess the seismoresistance of the structures and, comparing it with the seismicity of the area where the construction is located, to draw conclusions about if reconditioning them is necessary or not, whether by means of conventional techniques or by advanced methods like that of energy dispersers. This technique consists of installing special elements in the structure that avoid that pillars and beams suffer important damage in case of earthquake. The next extension of the Architects´ Association of Granada will be the first Spanish building with these special energy dispersers.
One of the present goals for seismic engineering is to control damage (reducing or removing it) in structures subjected to earthquakes. According to current rules of most countries, like Spain, conventional buildings are deigned to, in case of earthquake, experience important plastic deformations but without collapsing, to avoid the loss of human lives. However, allowing such plastic deformations means to admit structurale damages, which can make the demolition of the building after the earthquake advisable.
Antonio Marín Ruiz | alfa
Smart buildings through innovative membrane roofs and façades
31.08.2017 | Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP
Concrete from wood
05.07.2017 | Schweizerischer Nationalfonds SNF
Plants and algae use the enzyme Rubisco to fix carbon dioxide, removing it from the atmosphere and converting it into biomass. Algae have figured out a way to increase the efficiency of carbon fixation. They gather most of their Rubisco into a ball-shaped microcompartment called the pyrenoid, which they flood with a high local concentration of carbon dioxide. A team of scientists at Princeton University, the Carnegie Institution for Science, Stanford University and the Max Plank Institute of Biochemistry have unravelled the mysteries of how the pyrenoid is assembled. These insights can help to engineer crops that remove more carbon dioxide from the atmosphere while producing more food.
A warming planet
Our brains house extremely complex neuronal circuits, whose detailed structures are still largely unknown. This is especially true for the so-called cerebral cortex of mammals, where among other things vision, thoughts or spatial orientation are being computed. Here the rules by which nerve cells are connected to each other are only partly understood. A team of scientists around Moritz Helmstaedter at the Frankfiurt Max Planck Institute for Brain Research and Helene Schmidt (Humboldt University in Berlin) have now discovered a surprisingly precise nerve cell connectivity pattern in the part of the cerebral cortex that is responsible for orienting the individual animal or human in space.
The researchers report online in Nature (Schmidt et al., 2017. Axonal synapse sorting in medial entorhinal cortex, DOI: 10.1038/nature24005) that synapses in...
Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...
Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!
When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...
For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.
Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...
19.09.2017 | Event News
12.09.2017 | Event News
06.09.2017 | Event News
22.09.2017 | Life Sciences
22.09.2017 | Medical Engineering
22.09.2017 | Physics and Astronomy