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The purpose of this study was to develop an interactive tool that enables identification of different types of users of an application based on clickstream data. A complex hierarchical clustering algorithm tool called Recursive Hierarchical Clustering (RHC) was used. RHC provides a visualisation of user types as clusters, where each cluster has its own distinguishing action pattern, i.e., one or several consecutive actions made by the user in the application. A case study was conducted on the mobile application Plick, which is an application for selling and buying second hand clothes. During the course of the project, the analysis and its result was discovered to be difficult to understand by the operators of the tool. The interactive tool had to be extended to visualise the complex analysis and its result in an intuitive way. A literature study of how humans interpret information, and how to present it to operators, was conducted and led to a redesign of the tool. More information was added to each cluster to enable further understanding of the clustering results. A clustering reconfiguration option was also created where operators of the tool got the possibility to interact with the analysis. In the reconfiguration, the operator could change the input file of the cluster analysis and thus the end result. Usability tests showed that the extra added information about the clusters served as an amplification and a verification of the original results presented by RHC. In some cases the original result presented by RHC was used as a verification to user group identification made by the operator solely based on the extra added information. The usability tests showed that the complex analysis with its results could be understood and configured without considerable comprehension of the algorithm. Instead it seemed like it could be successfully used in order to identify user types with help of visual clues in the interface and default settings in the reconfiguration. The visualisation tool is shown to be successful in identifying and visualising user groups in an intuitive way.

[pt] O presente trabalho visa dar complemento à ferramenta gráfica interativa previamente criada com a finalidade de modelar e dimensionar vigas e pilares em concreto armado, inserindo no dimensionamento a não linearidade física. A ferramenta existente tem como base o programa FTOOL, que de maneira didática permite modelar e realiza análise estrutural em duas dimensões, resultando em deslocamentos, reações e esforços internos. Com base nos esforços e dados iniciais da estrutura tais como materiais, seções e cobrimento, a nova ferramenta altera a rigidez das seções para que se considere os efeitos de fissuração e fluência do concreto, além da relação não linear entre tensão e deformação. É necessário inserir uma análise da rigidez das seções, que após a fissuração da peça, na transição do Estádio I para o Estádio II, têm sua rigidez reduzida, cálculo este feito pela rigidez secante obtida pelos diagramas momento-curvatura. Desta forma, é necessário reavaliar a rigidez das diversas seções de maneira iterativa, fazendo-se a redistribuição de esforços de acordo com a variação das rijezas nas seções dos elementos estruturais. Propõe-se a comparação entre a recomendação da NBR 6118:2014, item 15.7.3, para consideração aproximada da não linearidade física e a rigidez secante obtida pelas relações momento-curvatura, tanto para os pilares como para as vigas. Para isso são estudados três exemplos de estruturas onde compara-se os resultados obtidos para os esforços internos, armadura e deslocamento. / [en] The present work aims to complement the graphic-interactive tool previously created for modeling and designing reinforced concrete beams and columns, introducing the material nonlinearity in the design. The existant tool is based on the FTOOL program, which didactically allows to model and performs structural analysis in two dimensions, resulting in deflections, reactions ans internal forces. Based on the forces and initial data of the structure such as materials, cross sections and concrete covering, the new tool changes the cross sections stiffnesses to consider the effects of concrete cracking and creep, besides the nonlinear relationships between tensions and deformations. It is necessary to introduce an analysis of the section stiffnesses, which after cracking, in the transition between stages I and II, presents a reduction in its stiffiness, that is evaluated by the secant stiffness from the moment-curvature diagrams. Thus, it is necessary to reevaluate the stiffness of the several sections iteratively, performing the redistribuition of the forces according to the vaiation of stiffness on the structural elements. It is proposed the comparison between the recommendation of NBR 6118 (ABNT, 2014), in its topic 15.7.3, for the approximate consideration of material nonlinearity and the secant stiffness obtained by the moment-curvature relationships, both for columns and beams. So three examples of structures are studied, in which the results obtained for internal forces, reinforcement and displacement are compared.