Conference Agenda

The objective of this research was to determine the effect of the distance of the first stirrup on the shear strength of reinforced concrete beams. Although Peruvian standards indicate that the distance of the first stirrup in beams should be less than or equal to 10 cm, in practice there are discrepancies in this distance, which usually ranges from 2.5 to 10 cm, but its effect on shear strength is unknown. Therefore, in this experimental research, scale frames were constructed with the intention of having beams that work in the condition of fixed supports. The spacings of the location of the first stirrup were 2.5, 5, 7.5, and 10 cm, and three frames were made for each distance. These prototypes were subjected to point loads at a distance of 15 cm from the support, equivalent to the camber of the beam. This was done in order to determine the shear strength. These tests were carried out on the Universal Machine of the Materials Testing Laboratory of the Faculty of Engineering of the National University of Cajamarca. The results obtained for the location of the first stirrup at 2.5 cm, 5 cm, 7.5 cm, and 10 cm determined resistances of 5.51, 4.98, 4.53, and 4.28 tons, respectively. Finally, it was concluded that the location of the first stirrup has an effect on the shear strength of reinforced concrete beams, since the closer the first stirrup is, the greater the beam's shear strength.

Mass movements represent a critical geotechnical challenge in seismic zones such as Sachaca, Arequipa, where the vulnerability of sandy–clayey soils demands efficient retaining solutions. This study compares the performance of reinforced‑concrete cantilever retaining walls and mechanically stabilized earth (MSE) walls reinforced with biaxial geogrid and planar geodrain, using numerical modeling in PLAXIS 2D. Soil properties were characterized (moisture content 31.62%, friction angle 30.1°), and stresses, deformations, and pore pressure were evaluated. The results show that cantilever walls exhibit lower displacements and deformations, while MSE walls provide superior pore‑pressure relief (≈1.12 times). These findings provide technical criteria to optimize the design of retaining structures in granular soils in seismic regions of southern Peru.

Abstract. This research addresses climate change, related to SDG 9, which promotes infrastructure modernization, and highlights the importance of raising awareness about sustainable practices. Its use of rice husk pozzolan is intended to optimize concrete qualities. Its properties are evaluated to adapt improvements to concrete with a 210 kg/cm² f'c. Its physical and mechanical characteristics were analyzed through laboratory tests, primarily in compression, flexure, and tensile tests, with the addition of ash at 0%, 2.5%, 5.0%, and 7.5%. A total of 72 concrete specimens were included. The guidelines established in NTP 339.082 / ACI 211 were applied, and crack surveys were conducted at 7, 14, and 28-day intervals. The methodology was applied experimentally, developing the concrete's axial force resistance taking into account the pozzolan. The results determined that the outstanding axial force resistance f'c 210 kg/cm2 was achieved with the addition of 2.5%, reaching a resistance of 232.7 kg/cm2, with a percentage value of 110.8%, surpassing the standard test of 220.8 kg/cm2, and percentage value of 105.1%.

The study focuses on the advanced hydromechanical modeling of andesitic and granodioritic rock masses applying the Hoek-Brown criterion to evaluate the stability of underground excavations in the Phase2 software of Rocscience. The interactions between the pore pressure, the rock deformation, and the stress variations were analyzed under dry conditions, with a water table located at the contact between both rock masses, and seismic alterations using horizontal and vertical coefficients. The results demonstrate that the increase in the pore pressure reduces the effective strength of the rock mass, and this compromises the stability of the excavations. Under seismic conditions, the redistribution of stresses and the alteration of the stress state increase the susceptibility to deformation. These findings highlight the importance of incorporating efficient drainage and adaptive support systems to ensure the stability. In addition, the study highlights the need for an integrated geotechnical approach in the design of underground excavations.

This study evaluates the impact of Building Information Modeling (BIM) applications on road construction projects in Arequipa, Peru. Using a mixed‑methods design, data were collected through structured surveys of 68 professionals and analyzed with the Relative Importance Index (RII), Kruskal–Wallis tests, and Multiple Correspondence Analysis (MCA). Three BIM applications were assessed: 3D modeling, interference analysis, and 4D planning. Results show that 3D modeling had the greatest positive impact (average score of 4.02), particularly in mitigating delays in planning and monitoring. Interference analysis was highly valued for reducing design changes, while 4D planning contributed to improved scheduling accuracy. MCA revealed strong associations between professional roles, experience levels, and perceived BIM impact, underscoring the contextual relevance of BIM adoption in emerging regions. This research provides the first empirical evidence of BIM’s utility in the road sector of Arequipa, offering guidance for practitioners and policymakers seeking to improve project performance. Findings highlight BIM’s potential to address chronic delays and inefficiencies in Peru’s road infrastructure, contributing to broader discussions on technology adoption in developing contexts

Urban accessibility and green infrastructure are fundamental components for the development of inclusive and sustainable cities. In this context, the present research aimed to demonstrate how projective strategies of urban accessibility and green infrastructure can contribute to the improvement of the Parque de la Amistad, located in the district of 26 de Octubre in Piura. The study adopted a qualitative approach, descriptive and exploratory in scope, and of applied type, focusing its analysis on the physical conditions, environmental performance, and social perception of the park. The sample consisted of 10 users from the local community, from whom information was collected through direct observation and semi-structured interviews regarding accessibility, connectivity, safety, and vegetation. The results revealed significant deficiencies in physical accessibility, such as deteriorated sidewalks, lack of normative ramps, interrupted pedestrian routes, and limited connectivity with the urban environment. Likewise, the green infrastructure showed insufficient vegetation coverage, low species diversity, and poor maintenance, reducing thermal comfort, ecological performance, and social use of the park. Safety conditions were also identified as heterogeneous, with areas of low illumination and scarce surveillance that negatively affect users’ perception of security.
It is concluded that the implementation of projective strategies such as the integration of universal accessibility principles, continuous pedestrian networks, inclusive signage, reforestation with native species, the incorporation of shaded areas, and improved lighting would significantly
enhance the functionality, environmental quality, and inclusiveness of the Parque de la Amistad.

This study investigates the mechanical performance of non-structural concrete reinforced with Pro-nylon textile fibers (FNP) for pedestrian pavements in Arequipa, Peru. Four mix designs containing 0%, 0.25%, 0.50%, and 1.00% fiber by volume were tested after 28 days of water curing. The 0.50 % fiber mix achieved a compressive strength of 203.6 kg/cm², comparable to the control (207.7 kg/cm²), while the 1.00 % dosage reduced strength significantly to 168.7 kg/cm². One-way ANOVA confirmed that fiber content had a statistically significant effect on compressive strength (p = 0.0002). In contrast, indirect tensile strength peaked at 24.0 kg/cm² with 0.25 % fibers, but differences among groups were not statistically significant (p = 0.30). These findings identify an optimal dosage range (0.25–0.50 %) that enhances compressive performance without compromising material integrity, underscoring the need for further studies on tensile behavior and durability under real service conditions.