Gaceta Técnica

27-44

Authors: R. F. Herrera, F. Medina, D. Nieto, M. Parrini

With a mixed global contract the maintenance of a road network is carried out, through the simultaneous execution of conservation under the modality to series of unitary prices, and by sum raised by level of service. In the latter, there is a great precariousness in the procedures, due to failures in the contractor's vision of assuming the management of the conservation, lack in the assignment of responsibilities to the team members, and poor control in the work quality and documentation of the contract. For this reason, in this work a management proposal is made defining each of the stages that compose it, in order to ensure a correct conservation of the elements that make up the road infrastructure. The proposed objectives are: to specify the methodology to be used to manage the maintenance of the network contracted under the mixed global modality, to specify the handling and control of the documentation that must be kept in the contract, and to define the skills and responsibilities of the work team. In order to comply with them, a bibliographical revision of the national regulations on the maintenance of roads was carried out, and the diversity of contracts used by the Road Service for road conservation was taken into account. In addition, through experience in mixed global conservation contracts, the skills and responsibilities recommended by the members of the team are defined

61-81

Authors: R. Aguiar

This paper presents the reinforcement of a flour storage silo affected by the earthquake of April 16, 2016, in ECUADOR, which had a moment magnitude of 7.8. Immediately after the earthquake carbon fiber was placed in the affected elements and the block masonry was changed with light walls in such a way to continue working. A seismic hazard study was carried out and two uniform seismic hazard spectra were determined for 975 and 2475 years of return period. To reinforce this structure it is proposed to place steel diagonals in the subsoil, in such a way that the loads that are generated go directly to the foundation. On the ground floor will be placed Shear Link power dissipators and on the next floor high TADAS heat sinks. The reinforced structure was analyzed for the spectra obtained in Manta from the earthquake of April 16 and for the two earthquakes of uniform seismic hazard indicated.

99-115

Authors: J. Yépez, M. Y. Dikdan, L. Andrade, R. Rojas

This article presents the study of structural reinforcement for a building of educational use, known as "Old Type II". The school was built before the creation of the Venezuelan Seismoresistant Covenin 1756. The results of the structural analysis showed insufficient responsiveness to service requests, high vulnerability to seismic action and deficiencies in the quantity and distribution of reinforcing steel. For this reason, the reinforcement of the superstructure was proposed by the construction of panel walls, verifying their action on the existing piloting system. For the modeling, the values of resistance of the concrete obtained in the destructive tests made by the materials laboratory of the School of Civil Engineering of the Universidad Centroccidental Lisandro Alvarado and the soil parameters from the geotechnical study were used.