• Daily Control System for the Construction of Multi-family Building Projects

      Fernandez, Diego; Zamora, Yeffry; Rodriguez, Sandra; Vilcapoma, Jorge (2021-01-01)
      Construction projects for buildings, in the execution stage, show a variation of the real with respect to what is planned in the budget. The consequence of this lag presented usually causes large economic losses. Given this situation, in the construction industry, various control systems have been developed that have as a final deliverable a frequent management report, which serves to make decisions regarding the analyzed, whose results are applied and evaluated after a specific period of time. These management reports have good results at the time of their application; however, data processing, analysis execution, and decision making take approximately 30 days. In this sense, the present investigation proposes to develop a control system focused in real time, generated by the daily control in the execution stage. The results show a reduction of waste in the main resources of multi-family building projects, and this is in labor and materials, identifying the causes that originate them and suggesting generic solutions, at the end of the workday.
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    • Dynamic Amplification Factor Proposal for Seismic Resistant Design of Tall Buildings with Rigid Core Structural System

      Quezada, Eder; Serrano, Yaneth; Huaco, Guillermo (2021-01-01)
      Currently, there is an increase in the demand for tall buildings in the city of Lima. This research proposes to reduce the dynamic amplification factor through the seismic design of tall buildings based on the requirements of Peruvian code considering that they are regular in plan and height. Minimum base shear values according to the comparison of static seismic shear and dynamic shear from the spectral modal analysis were reviewed for cases of buildings larger than 120 m. The study of 28 reinforced concrete buildings was proposed, with different heights - varying from 24 to 36 floors, with different floor configurations, as well as the arrangement of the walls considering as a rigid core structural system. Additionally, the characteristics of the materials, the loads and combinations were defined. The responses of these buildings were determined by the response spectrum analysis (RSA) and then compared with those obtained by the lineal response history analysis (LRHA), for the last analysis, five Peruvian seismic records were used and scaled to 0.45 g. The seismic responses of the LRHA procedure were taken as a benchmark. The result of this study is the analysis and proposal of the C/R factor for high-rise buildings, as well as obtaining the base shear and drift verification. Minimum base shear values can be reduced for high or long-term buildings, being regular in plan and height.
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    • A Geometric Design of Traffic-Light Roads Crossing Using the Continuous Flow Intersections Methodology to Reduce Points of Primary Conflicts Caused by Left Turns

      Chuco, Betsi; Pérez, Carlos; Silvera, Manuel; Campos, Fernando (2021-01-01)
      The continuous flow intersections (CFI) increase the operational capacity of road systems with congestion problems, by using shared lanes located at the access points before the intersection. However, the CFI presents road safety risks that increase the likelihood of vehicle collision. This article proposes a geometric design composed of raised delineators at a traffic-light intersection, whose objective is to eliminate the points of primary conflicts caused by the left turns of the vehicles. To do this, a study was conducted to identify the different maneuvers present in a wide cross-type intersection in a commercial area located in the city of Lima. A total of 3219 vehicles was collected, of which 561 vehicles turned left demonstrating the high density of this type of maneuver. The effectiveness of the proposed design is validated using a microsimulation in the Vissim program. The results show that it was reduced from 58 to 8 points of conflict, increasing operational capacity by 34.97%. Finally, the risks caused by CFI decreased by 83%.
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    • Microsimulation of Public Transport Stops for the Optimization of Waiting Times for Users Using the Social Force Model

      Mendoza, Francis; Tong, Mayling; Silvera, Manuel; Campos, Fernando (2021-01-01)
      Cities in the world aim to ensure the mobility of people, through the implementation of efficient Integrated Transportation Systems (ITS). This aims to improve the transport of people, which guarantees that they can be mobilized safely and without delays in the terminals and bus stops of the public transport system. The present article proposes a design of public transport stops aimed at optimizing the waiting time of users when transferring from one bus to another. For the validity of the proposal, the social force model of the Vissim program was used, where the behavior of the users within the bus stops was reflected. The results showed that the waiting times in the calibrated and validated microsimulation model were optimized by approximately 20%, which generates an improvement in the efficiency of the public transport system.
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    • Use of Data Acquisition Technologies to Optimize Construction Progress Monitoring Times in Residential Buildings

      Aronés, Marisol; Mendoza, Andrea; Rodriguez, Sandra; Ramirez, Humberto (2021-01-01)
      The monitoring systems that are currently used as part of the management of construction projects consist of collecting the field information, documenting it manually and then digitizing it. Those responsible for carrying out the reports through this procedure dedicate between 28% and 41% of their time daily for their preparation. This traditional process is slow and inefficient because the information is dispersed in different documents, so data can be omitted, causing that no corrective actions are taken in a timely manner. Likewise, the construction sector has little use of technological resources, and therefore, there is no automated process, which makes it difficult to monitor construction projects in an efficient way. In this sense, this research establishes the optimization of the control procedure through the use of a data acquisition tool to reduce the man-hours used in advance control. With the application of this proposal, the hours spent by the personnel involved in project management were reduced by 30%.
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