An evolving design philosophy for port structures in many seismically active regions reflects the observations that: -The deformations in ground and foundation soils and the corresponding structural deformation and stress states are key design parameters. -Conventional limit equilibrium-based methods are not well suited to evaluating these parameters. -Some residual deformation may be acceptable. Performance-based design is an emerging methodology whose goal is to overcome the limitations present in conventional seismic design. Conventional building code seismic design is based on providing capacity to resist a design seismic force, but it does not provide information on the performance of structure when the limit of the force-balance is exceeded. If we demand that limit equilibrium not be exceeded for the relatively high intensity ground motions associated with a rare seismic event, the construction cost will most likely be too high. If forcebalance design is based on amore frequent seismic event, then it is difficult to estimate the seismic performance of the structure when subjected to ground motions that are greater than those used in design. In this thesis a case study will be carried out on a typical port structure to show the performance evolution aspects and its comparison with damage criteria and performance grade in performance-based methodology.

Debido a la importancia de las estructuras marítimas se requiere que el concreto con el que se fabrican garantice su impermeabilidad frente a las aguas del mar, siendo los puertos los que sufren diferentes anomalías al estar en contacto directo con los sulfatos y cloruros, que lo degradan progresivamente ocasionando fisuración. Para ello se estudió la influencia de la adición de Nanotubos de Carbono (NTC) a las mezclas de concreto. Los NTC poseen una gran superficie específica que incide en la matriz de cemento modificando los silicatos de calcio hidratado, produciendo una mayor cohesión y el aumento de la compacidad del concreto. Para corroborar la efectividad de la adición de NTC las propiedades del concreto se elaboró 2 diseños de mezcla, uno con NTC-0% y otro diseño con adición de NTC (0.05%, 0.10% y 0.15%). Inicialmente se caracterizaron los materiales y se evaluó el proceso de dispersión de NTC en las mezclas de concreto utilizando superplastificante y haciendo uso de la sonicación como método de dispersión. Asimismo, se realizaron ensayos de asentamiento, de resistencia a la compresión, tracción, flexión y el ensayo de permeabilidad. El presente trabajo busca reducir la permeabilidad del concreto de las estructuras portuarias ubicados en zonas de salpicaduras y mareas, estudiando para ello diferentes propiedades físicas, mecánicas y la viabilidad económica del concreto con NTC; los resultados indican que el asentamiento disminuye, las resistencias a la compresión, tracción y flexión aumentan, la profundidad de penetración del agua disminuye, y el costo por m3 es mayor. / Due to the importance of maritime structures, it is required that the concrete with which they are manufactured guarantees its impermeability against the waters of the sea, being the ports those that suffer different anomalies when being in direct contact with sulfates and chlorides, which degrade it. progressively causing cracking. For this, the influence of the addition of Carbon Nanotubes (NTC) to concrete mixtures was studied. NTCs have a large specific surface that affects the cement matrix, modifying the hydrated calcium silicates, producing greater cohesion, and increasing the compactness of the concrete. To corroborate the effectiveness of the addition of NTC the properties of the concrete, 2 mix designs were elaborated, one with NTC-0% and another design with the addition of NTC (0.05%, 0.10% and 0.15%). Initially, the materials were characterized and the NTC dispersion process in concrete mixtures was evaluated using superplasticizer and using sonication as a dispersion method. Likewise, settlement tests, resistance to compression, traction, bending and the permeability test were carried out. This work seeks to reduce the permeability of concrete in port structures located in splash and tidal areas, studying different physical and mechanical properties and the economic viability of concrete with NTC; The results indicate that the settlement decreases, the resistance to compression, traction and bending increase, the depth of water penetration decreases, and the cost per m3 is greater. / Tesis