scholarly journals STRUCTURAL REHABILITATION AND REAL TIME MONITORING OF THE “PONTE DELLE GRAZIE” BRIDGE IN FAENZA, ITALY

Author(s):  
G. Corsi ◽  
F. Frediani ◽  
M. La Monica ◽  
M. Lapi ◽  
L. Miccinesi ◽  
...  

<p><strong>Abstract.</strong> The “Ponte delle Grazie” is a three spans bridge, with a total length of 72 meters, built between 1948 and 1952 in Faenza, Italy. The reinforced concrete main beams of the deck have undergone a strong deterioration over the years. In detail atmospheric agents and chemical aggressions caused a strong deterioration of the concrete, up to the point of making the structure not accessible and at risk of collapse. In fact, the five main beams were heavily damaged, as well as the concrete bearings were strongly compromised. So, an urgent intervention was necessary to save the structure of this historic bridge. A delicate restoration has allowed to remove the deteriorated concrete and to restore the resistant sections with new materials compatible with the old remaining structures. In particular, a specific rehabilitation procedure was studied using fiber-reinforced cement mortar with low elastic modulus, that is shrinkage compensated, in combination with composite materials reinforcements. Without modifying the structural behavior of the bridge, the deteriorated concrete was restored and reinforced, in a sustainable way, in order to make the structure safe and usable again. After the restoration and reinforcement the bridge capacity satisfy a reduced live load useful for urban traffic. After the restoration and reinforcement the bridge capacity satisfy a reduced live load useful for urban traffic. Even if the structure has returned to be suitable for vehicular traffic, it has been necessary to set up a real-time monitoring system, which monitors the live load and the behavior of the bridge. In detail it is used a system of geophones, that are able to detect the displacement of structures by integrating in time their response. They can provide continuous health monitoring of the bridge by transmitting the data to a remote server.</p>

RSC Advances ◽  
2014 ◽  
Vol 4 (42) ◽  
pp. 22224-22229 ◽  
Author(s):  
Feng Yang ◽  
Xiaoqun Zhu ◽  
Chunguang Li ◽  
Jinliang Yang ◽  
Jeffery W. Stansbury ◽  
...  

The kinetics of electro-initiated polymerization of vinyl ethers in the presence of potassium hexafluoroantimonate are investigated by RT-FT-NIR. The apparatus for real time monitoring of the kinetics of the reaction is set up by using ITO conductive glasses. Potassium hexafluoroantimonate has been proven to be an efficient initiator for electro-initiated polymerization of vinyl ethers.


2011 ◽  
Vol 28 ◽  
pp. 39
Author(s):  
J. Rodiera ◽  
J. Miquelay ◽  
P. Matute ◽  
M. Caccia ◽  
R. Torres ◽  
...  

1993 ◽  
Vol 156 ◽  
pp. 79-83
Author(s):  
Li Zhigang

The DCMT (Danish-Chinese Meridian Telescope) is jointly developed by the Shaanxi Astronomical Observatory, Nanjing Astronomical Instrument Factory and Copenhagen University Observatory. The instrument was set up at the Shaanxi Astronomical Observatory in 1990 and put in testing operation in the same year. The design of this horizontal meridian circle is very compact and allows direct real-time monitoring of the instrument parameters. We have studied the stability of the instrument and internal refraction in the telescope tube.


2012 ◽  
Vol 588-589 ◽  
pp. 1058-1061
Author(s):  
Ting Zhang ◽  
Zhan Wei Song

With the sustained growth of vehicle ownerships, traffic congestion has become obstacle of urban development. In addition to developing public transport and accelerating the construction of rail transit, use scientific managing and controlling method in real-time monitoring traffic flow to divert the traffic stream is an effective way to solve urban traffic problems. In this paper, cross-correlation algorithm is used to obtain real-time traffic information, such as capacity and occupancy of a lane, so as to control traffic lights intelligently.


Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Chunjie Lian ◽  
Hua Wei ◽  
Xiaoqing Bai ◽  
Zhongliang Lyu

The existing power grid alarm system using SMS (SMSAS) is complex and suffers some problems such as high latency in data transmission, low reliability, and poor economy. For solving these problems, this paper proposes a WeChat-based system under the virtual private cloud environment to achieve real-time monitoring and alarming for the power grid operation status (WMAS). For WMAS, the WeChat mini program (WMP) is adopted, and it has the dedicated data channel using the Https protocol, which is set up in the WMP and the web API to encrypt the data content to ensure the integrity of the data. Combined with virtual private cloud technology, the hardware resources are virtualized, and the proposed system has strong disaster recovery capability, which significantly improves the flexibility and reliability of the system. Compared with SMSAS, our simulation shows that the time from sending to receiving the information in the proposed system is reduced from 4.9 seconds to 172 milliseconds, with the latency reduced by 28 times. On the contrary, the reliability of the proposed system is as high as 99.9971%, and the annual failure time is 15.24 minutes, which is 380 times lower than 96.51 hours of the SMSAS. The proposed system has been implemented in the Lipu power system in Guangxi, China. More than one year of stable operation indicates that the proposed system is safe, reliable, flexible, and convenient with a bright prospect for future applications.


2006 ◽  
Vol 175 (4S) ◽  
pp. 521-521
Author(s):  
Motoaki Saito ◽  
Tomoharu Kono ◽  
Yukako Kinoshita ◽  
Itaru Satoh ◽  
Keisuke Satoh

2001 ◽  
Vol 11 (PR3) ◽  
pp. Pr3-1175-Pr3-1182 ◽  
Author(s):  
M. Losurdo ◽  
A. Grimaldi ◽  
M. Giangregorio ◽  
P. Capezzuto ◽  
G. Bruno

2014 ◽  
Author(s):  
Rozaimi Ghazali ◽  
◽  
Asiah Mohd Pilus ◽  
Wan Mohd Bukhari Wan Daud ◽  
Mohd Juzaila Abd Latif ◽  
...  

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