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Seismic Base Isolation
Seismic base isolation, also known as base isolation, or base isolation system, is one of the most popular means of protecting a structure against earthquake forces. It is a collection of structural elements which should substantially decouple a superstructure from its substructure that is in turn resting on the shaking ground, thus protecting a building or non-building structure's integrity. Base isolation is one of the most powerful tools of earthquake engineering pertaining to the passive structural vibration control technologies. The isolation can be obtained by the use of various techniques like rubber bearings, friction bearings, ball bearings, spring systems and other means. It is meant to enable a building or non-building structure to survive a potentially devastating seismic impact through a proper initial design or subsequent modifications. In some cases, application of base isolation can raise both a structure's seismic performance and its seismic sustainab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pasadena City Hall
Pasadena City Hall, completed in 1927, serves as the central location for city government in the Pasadena, California, City of Pasadena, California and is a significant architectural example of the City Beautiful movement of the 1920s. History In 1923, the people of Pasadena, California, Pasadena approved a bond measure issuing $3.5 million towards the development of a civic center. City Hall was to be the central element of this center. The San Francisco, California, San Francisco architecture firm of Bakewell and Brown designed City Hall, which has elements of both Mediterranean Revival Style architecture, Mediterranean Revival Style and Spanish Colonial Revival Style architecture. It was completed on December 27, 1927 at a cost of $1.3 million. It measures by , and rises 6 stories. There are over 235 rooms and passageways that cover over . The defining dome, located above the west entrance, is tall and in diameter. On July 28, 1980 the Civic Center District, including Pasa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linear-motion Bearing
A linear-motion bearing or linear slide is a bearing designed to provide free motion in one direction. There are many different types of linear motion bearings. Motorized linear slides such as machine slides, X-Y tables, roller tables and some dovetail slides are bearings moved by drive mechanisms. Not all linear slides are motorized, and non-motorized dovetail slides, ball bearing slides and roller slides provide low-friction linear movement for equipment powered by inertia or by hand. All linear slides provide linear motion based on bearings, whether they are ball bearings, dovetail bearings, linear roller bearings, magnetic or fluid bearings. X-Y tables, linear stages, machine slides and other advanced slides use linear motion bearings to provide movement along both X and Y multiple axis. Rolling-element bearing A rolling-element bearing is generally composed of a sleeve-like outer ring and several rows of balls retained by cages. The cages were originally machined from soli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earthquake Protector At The Field Museum
An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in intensity, from those that are so weak that they cannot be felt, to those violent enough to propel objects and people into the air, damage critical infrastructure, and wreak destruction across entire cities. The seismic activity of an area is the frequency, type, and size of earthquakes experienced over a particular time period. The seismicity at a particular location in the Earth is the average rate of seismic energy release per unit volume. The word ''tremor'' is also used for non-earthquake seismic rumbling. At the Earth's surface, earthquakes manifest themselves by shaking and displacing or disrupting the ground. When the epicenter of a large earthquake is located offshore, the seabed may be displaced sufficiently to cause a tsunami. Earthquakes c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tokyo
Tokyo (; ja, 東京, , ), officially the Tokyo Metropolis ( ja, 東京都, label=none, ), is the capital and largest city of Japan. Formerly known as Edo, its metropolitan area () is the most populous in the world, with an estimated 37.468 million residents ; the city proper has a population of 13.99 million people. Located at the head of Tokyo Bay, the prefecture forms part of the Kantō region on the central coast of Honshu, Japan's largest island. Tokyo serves as Japan's economic center and is the seat of both the Japanese government and the Emperor of Japan. Originally a fishing village named Edo, the city became politically prominent in 1603, when it became the seat of the Tokugawa shogunate. By the mid-18th century, Edo was one of the most populous cities in the world with a population of over one million people. Following the Meiji Restoration of 1868, the imperial capital in Kyoto was moved to Edo, which was renamed "Tokyo" (). Tokyo was devastate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Museum Of Western Art
The is the premier public art gallery in Japan specializing in art from the Western tradition. The museum is in the museum and zoo complex in Ueno Park in Taitō, central Tokyo. It received 1,162,345 visitors in 2016. History The NMWA was established on June 10, 1959. The museum developed around the core art collection of Kōjirō Matsukata (1865–1950), whose thinking is mirrored in the museum he anticipated. Matsukata's acquisition strategies were designed to create the nucleus of what he hoped would become an evolving national museum specializing in Western art. The museum exhibits works from the Renaissance to the early 20th century, many having been acquired since the museum's opening. The museum's purpose is to provide the public with opportunities to appreciate Western art. Since its opening, the museum, as Japan's only national institution devoted to Western art, has been involved in exhibitions, art work and document acquisition, research, restoration and conser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gates Of Hell
''The Gates of Hell'' (french: La Porte de l'Enfer) is a monumental bronze sculptural group work by French artist Auguste Rodin that depicts a scene from the ''Inferno'', the first section of Dante Alighieri's ''Divine Comedy''. It stands at 6 metres high, 4 metres wide and 1 metre deep () and contains 180 figures. The figures range from high up to more than one metre (3 ft). Several of the figures were also cast as independent free-standing statues. History The sculpture was commissioned by the Directorate of Fine Arts in 1880 and was meant to be delivered in 1885. Rodin would continue to work on and off on this project for 37 years, until his death in 1917. The Directorate asked for an inviting entrance to a planned Decorative Arts Museum with the theme being left to Rodin's selection. Even before this commission, Rodin had developed sketches of some of Dante's characters based on his admiration of Dante's ''Inferno''. The Decorative Arts Museum was ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auguste Rodin
François Auguste René Rodin (12 November 184017 November 1917) was a French sculptor, generally considered the founder of modern sculpture. He was schooled traditionally and took a craftsman-like approach to his work. Rodin possessed a unique ability to model a complex, turbulent, and deeply pocketed surface in clay. He is known for such sculptures as ''The Thinker'', ''Monument to Balzac'', '' The Kiss'', ''The Burghers of Calais'', and ''The Gates of Hell''. Many of Rodin's most notable sculptures were criticized, as they clashed with predominant figurative sculpture traditions in which works were decorative, formulaic, or highly thematic. Rodin's most original work departed from traditional themes of mythology and allegory. He modeled the human body with naturalism, and his sculptures celebrate individual character and physicality. Although Rodin was sensitive to the controversy surrounding his work, he refused to change his style, and his continued output brought increas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moat
A moat is a deep, broad ditch, either dry or filled with water, that is dug and surrounds a castle, fortification, building or town, historically to provide it with a preliminary line of defence. In some places moats evolved into more extensive water defences, including natural or artificial lakes, dams and sluices. In older fortifications, such as hillforts, they are usually referred to simply as ditches, although the function is similar. In later periods, moats or water defences may be largely ornamental. They could also act as a sewer. Historical use Ancient Some of the earliest evidence of moats has been uncovered around ancient Egyptian castles. One example is at Buhen, a castle excavated in Nubia. Other evidence of ancient moats is found in the ruins of Babylon, and in reliefs from ancient Egypt, Assyria, and other cultures in the region. Evidence of early moats around settlements has been discovered in many archaeological sites throughout Southeast Asia, including ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diaphragm (structural System)
In structural engineering, a diaphragm is a structural element that transmits lateral loads to the vertical resisting elements of a structure (such as shear walls or frames). Diaphragms are typically horizontal, but can be sloped such as in a gable roof on a wood structure or concrete ramp in a parking garage. The diaphragm forces tend to be transferred to the vertical resisting elements primarily through in-plane shear stress. The most common lateral loads to be resisted are those resulting from wind and earthquake actions, but other lateral loads such as lateral earth pressure or hydrostatic pressure can also be resisted by diaphragm action. The diaphragm of a structure often does double duty as the floor system or roof system in a building, or the deck of a bridge, which simultaneously supports gravity loads. Diaphragms are usually constructed of plywood or oriented strand board in timber construction; metal deck or composite metal deck in steel construction; or a concrete ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
