Causes of bridge deck cracking previous research indicates that the development of cracking in newly constructed bridge decks continues to be a nationwide problem. According to sdot, up until 20 the west seattle bridge was being checked for cracks less than annually. A 32bit x 32bit transmit fifo and a 32 bit x 32bit receive fifo serve as the data buffer to coordinate data flows between the ahb and spi interfaces. Bridge of spies is a 2015 historical drama film directed and coproduced by steven spielberg, written by matt charman and the coen brothers, and starring tom hanks, mark rylance, amy ryan, and alan alda. Yet hungarian students every year spend long hours but rather days building spaghetti bridges only to have them broken or blown into pieces for the sake of the reccs meaning crack in hungarian competition no wonder some of them cant bear to watch it. This module operates as an i2cbus slavetransmitter or slavereceiver and an spi master. The max3107 is an advanced universal asynchronous receivertransmitter uart with 128 words each of receive and transmit firstinfirstout fifo that can be controlled through i. Sep 15, 2016 fifteen years have passed since south padre islands queen isabella memorial causeway collapsed on the night of sept. Fifteen years have passed since south padre island s queen isabella memorial causeway collapsed on the night of sept. I2ctospi bridge lowcost interface for the qf1da512 and. This allows the microcontroller to communicate directly with spi devices through its i2cbus. City officials have known about cracks in west seattle bridge since. Significant crack widths and various degrees of cracking exist in different bridge systems.
Built by convicts in 1843, this bridge abruptly pops out of the landscape to baffle passersby with its odd design. The pinout of the input pins makes it plugin compatible with the sbcsam9g45 development boards j8 or j spi headers. Ethernet to spi bridge c programming circuit design. Callis observed cracking on the peace riv er bridge on interstate 75 near punta gorda, florida, caused concern about the possibility of high maintenance cost and the structural adequacy of the bridge system. During the cold war, an american lawyer is recruited to defend an arrested soviet spy in court, and then help the cia facilitate an exchange of the spy for the soviet captured. I2c slave to spi master bridge lattice semiconductor. Steelmasters auckland steelmasters whangarei steelmasters napier steelmasters palmerston north galvanizers auckland ltd platemasters auckland ltd. It controls all the spi busspecific sequences, protocol, and timing. After the sc18is602b address is transmitted on the bus, the configure spi interface. Many bridges in the state of indiana have been identified to have cracking in the concrete deck. Spiky spike bridge, otherwise named world bowser1, is the first level in world bowser from super mario 3d world, becoming accessible after the completion of world castle. The rebellious scot william wallaces head is thought to.
Dear south padre island windsurfingkiting members and anyone concerned about future access to laguna madre bay. The usb bridge device eliminates the need for usb or spi communications expertise and significantly shortens development time and timetomarket. The qf1d512 and qf1da512 are both designed to interface directly with the serial peripheral interface spi bus of microcontrollers and digital signal processors. Spiky spike bridge sneak, otherwise named world flower11, is the eleventh level in world flower in super mario 3d world. Photo by rob telford from the londonist flickr pool. Completing this level unlocks both plessies dune downhill and cookie cogworks. Study of cracking of composite deck bridge over peace river. Mcp2515iso can controller converts spi bus to can bus 16 mhz crystal size. It is unlocked by completing honeycomb skyway, and its own completion unlocks boss blitz. Spi master i2c spi slave sc16is752762 bridge i2c spi irda system transceiver optional uart gpios remote system rs232485 modem remote control pda cell phone fan control keypad leds handheld cradle sc16is7xx usage scenarios type number uart channels irda sir speed spi speed up to package package dimensions sc16is750ibs 1 115 kbps 4. West seattle bridge was on a road to collapse, engineers reports. Internal curing has primarily been used in bridge decks in illinois, indiana 8, iowa, new york 9, and utah 10. Cracking behavior of structural slab bridge decks january 2015 6. This module is designed to serve as an interface between a standard i2cbus of a microcontroller and an spi bus.
A public hearing was held recently revealing more detailed information regarding the 2nd access bridge to south padre island. The sc18is600 acts as a bridge between a spi interface and an i2cbus. Cause and control of transverse cracking in concrete. This reference design implements an i2c slave to spi master bridge. We will also outline nxps options for managing communications between different bus interfaces and protocols. West seattle highrise bridge inspection reports sdot blog. This tutorial will provide an overview of nxps bridge solutions for i2c, spi, and uart interface applications. Crack leaching indicates the cracks are full depth.
Rettner, primary author american engineering testing, inc. A ribbon cable is provided to make that connection. The rate at which strain is applied has a larger impact on the extent of deck cracking than the ultimate strain from shrinkage and thermal effects because, given time, creep can mitigate the stresses that develop from the. A factor termed the crack ratedefined as ten times the cracking divided by the bridge widthwas established. It is hard to imagine how strong structures can be made from the everyday strings of pasta we eat for dinner. Donovan, who is entrusted with negotiating the release of francis gary powersa u. Some cracking is normal for this type of bridge, but we decided to increase monitoring to keep an eye on it. South padre pauses to remember bridge collapse san. Sc18is602 i2c to spi bridge module sandbox electronics. The cracks in the 36yearold bridge first appeared during a routine inspection in 20 when four sets of cracks were discovered in the bridges midspan. Im not sure if this is the wifly gsx you mentioned in your original question.
Lowpower bridges for i2c or spi to uart or irda or gpio these compact protocol converters create seamless, lowpower, lowvoltage connections for the most widely used interfaces i2c, gpio, irda, spi, uart, making it easy to add multiple devices to any application with i2c or spi bus interfaces. Stormguard double hotdip galvanized for weather exposure or pressuretreated lumber applications. A thesis submitted to the department of civil engineering in partial fulfillment of the requirement for the degree of. Spike exploration holding as, an oil explorer operating in the norwegian and u. Spi vs i2c 21 spi more suited for applications that are thought as data streams as opposed to readingwriting address locations in slave devices gains efficiency in applications that take advantage of its duplex capability e. Tuesdays spike in covid19 deaths comes after two weeks of. It is also possible for them to interface to, and be controlled by, an interic i2c master. Inspection reports show cracks on west seattle bridge since 20. The logispi spi to axi4 controller bridge ip core from xylons logicbricks ip library enables easy interchip boardlevel interfacing between virtually any microcontroller mcu and xilinx zynq7000 soc and fpgas through the serial peripheral interface spi bus. It is unlocked by completing honeycomb skyway, and its. Stephen lane research scientist introduction shortly after construction, many longitudinal cracks were noted by vdot personnel in the concrete of deck span no. This i2ctospi bridge implementation provides a low cost solution. Fastmoving diagonal cracks on the bridges girder walls, which.
Recap of march 30 seattle city council briefing on west seattle. Watch as visitors to an adrenalinejunkie attraction in chinas east taihang mountains think a steep glass walkway is cracking. The spi interface supports mode 3 of the spi specification and can operate up to 1. The 2x and 4x rate modes allow a maximum of 24mbps data rates. February 2014 research project final report 201409. S audio bridge silicon labs crystalless audio bridge is designed to support a wide range of codecs and dacs in usbbased audio applications. Trais the university of akron 302 buchtel common akron, oh 44325 sjn 4708 11. West seattle bridge inspection reports shed light on. The literature search by the mndot library came back with 53 results of completed research sources. This module is useful when there is no spi interface on the microcontroller or the spi interface is occupied for something else. Cause and control of transverse cracking in concrete bridge decks final report december 2002 submitted by department of civil and environmental engineering new jersey institute of technology newark, nj 07102 njdot research project manager mr.
University of north florida college of computing, engineering, and. South padre pauses to remember bridge collapse san antonio. Study of cracking of composite deck bridge on i7 5 over peace river clifford 0. Causes of early cracking in concrete bridge decks november 2016 road map track 6 project title monly occur after construction but before causes of early cracking in. I2ctospi bridge lowcost interface for the qf1da512 and qf1d512. I2ctospi bridge lowcost interface for the qf1da512 and qf1d512 rev a3, may 09. Hotdip galvanized 516 bridge spikes bridge maze nails.
New south padre island bridge spi windsurfing news. The spi bus provides a synchronized serial link with performance in mhz range. New pictures reveal cracking cement forcing closure of west seattle. Sep 16, 20 spike exploration holding as, an oil explorer operating in the norwegian and u.
South padre island on the night the bridge collapsed, their vehicles suddenly plunging 80 feet into the churning bay below, those who didnt make it. One of the most influential personalities in the history of cinema, steven spielberg is hollywoods best known director and one of the wealthiest filmmakers in the world. Great for bridge construction as well as general landscaping and railroad ties. Spiky spike bridge super mario wiki, the mario encyclopedia. Annual inspections of the bridge continued from 20142019 and showed low level crack growth, according to sdot reports. During the cold war, an american lawyer is recruited to defend an arrested soviet spy in court, and then help the cia facilitate an exchange of the spy for the soviet captured american u2 spy plane pilot, francis gary powers. The bridge was made from field stones laid without mortar or cement and the parapet features field stones laid vertically, giving the bridge a spiky appearance. Sketch of typical crack locations and numbers figure 3. Cracking has been identified in the negative and positive moment regions of bridges on both the top and bottom surfaces and can appear before or shortly after the opening of the structure to live loads. Terrifying prank makes tourists think glass bridge is cracking. Sep 16, 2011 south padre island on the night the bridge collapsed, their vehicles suddenly plunging 80 feet into the churning bay below, those who didnt make it simply were on their way home.
Due to the multislave characteristics of i2c bus, multiple such modules could be added to the system at the same time. Spiky spike bridge sneak super mario wiki, the mario. The ahb spi bridge performs either paralleltoserial conversion or serialtoparallel conversion with a maximum throughput of 50 mbitsec. Bridge inspectors first saw the series of cracks in concrete beneath the main spans deck back in 20. A reader comments on the practice of putting diodes across the. It allows a spi master device to communicate with i2cbus slave devices. Cracks have developed in both of the west seattle bridges twin girders. Nxp semiconductors sc18is602b i2cbus to spi bridge 7. All modern concrete bridges are built with the expectation that some cracks will eventually form. Rating is available when the video has been rented. The spi is a fullduplex synchronous fourwire serial interface between a single bus master, and one or more bus slave devices.
Learn more about electrical engineering engineering. Spike catching diodes fables and facts theres a lot of misinformation circulating around the aviation community as to whether or not and how a spikecatching diode should be included in the circuit controlling the coil of any large relay, contactor or other inductive load. South padre island on the night the bridge collapsed, their vehicles suddenly plunging 80 feet into the churning bay below, those who didnt make it simply were on their way home. Set during the cold war, the film tells the story of lawyer james b. A phaselocked loop pll, prescaler, and fractional baudrate generator. Investigation of bridge deck cracking in various bridge. Concerns about new spi bridge please write a letter, fax or email expressing your concern. Terrifying prank makes tourists think glass bridge is. Serial peripheral interface spi to ethernet modules.
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