Doctor of Philosophy / Civil Engineering / Asadollah Esmaeily / Accurate and realistic assessment of the performance of columns in general, and those in critical locations that may cause progressive failure of the entire structure, in particular, is significantly important. This performance is affected by the load history, pattern, and intensity. Current design code does not consider the effect of load pattern on the load and displacement capacity of columns. A primary research sponsored by Kansas Department of Transportation (KDOT) was conducted as the initial step of the present study (No. K-TRAN: KSU-11-5). The main goals of the KDOT project were: (1) investigation of new KDOT requirements in terms of the column design procedure and detailing and their consistency with AASHTO provisions; (2) verification of the KDOT assumptions for the plastic hinge regions for columns and bridge piers, (3) provide assessment of the load capacity of the existing columns and bridge piers in the light of the new specifications and using the new load demand as in the new provisions; and finally recommendations for columns and bridge piers that do not meet the new requirements. A conclusion was drawn that there is a need for conducting more studies on the realistic performance of Reinforced Concrete (RC) sections and columns. The studies should have included performance of RC members under various loading scenarios, assessment of columns capacity considering confinement effect provided by lateral reinforcement, and investigation on performance of various monotonic and cyclic material models applied to simulate the realistic performance. In the study reported here, monotonic material models, cyclic rules, and plastic hinge models have been utilized in a fiber-based analytical procedure, and validated against experimental data to simulate behavior of RC section under various loading scenarios. Comparison of the analytical predictions and experimental data, through moment–curvature and force–deflection analyses, confirmed the accuracy and validity of the analytical algorithm and models. The performance of RC columns under various axial and lateral loading patterns was assessed in terms of flexural strength and energy dissipation. FRP application to enhance ductility, flexural strength, and shear capacity of existing deficient concrete structures has increased during the last two decades. Therefore, various aspects of FRP-confined concrete members, specifically monotonic and cyclic behavior of concrete members confined and reinforced by FRP, have been studied in many research programs, suggesting various monotonic models for concrete confined by only FRP. Exploration of existing model performances for predicting the behavior of several tested specimens shows a need for improvement of existing algorithms. The model proposed in the current study is a step in this direction. FRP wrapping is typically used to confine existing concrete members containing conventional lateral steel reinforcement (tie/spiral). The confining effect of lateral steel reinforcement in analytical studies has been uniquely considered in various models. Most models consider confinement due to FRP and ignore the effect of conventional lateral steel reinforcement. Exploration of existing model performances for predicting the behavior of several tested specimens confined by both FRP and lateral steel shows a need for improvement of existing algorithms. A model was proposed in this study which is a step in this direction. Performance of the proposed model and four other representative models from literature was compared to experimental data from four independent databases. In order to fulfill the need for a simple, yet accurate analytical tool for performance assessment of RC columns, a computer program was developed that uses relatively simple analytical methods and material models to accurately predict the performance of RC structures under various loading conditions, including cyclic lateral displacement under a non-proportionally variable axial load (Esmaeily and Xiao 2005, Esmaeily and Peterman 2007). However, it was limited to circular, rectangular, and hollow circular/rectangular sections and uniaxial lateral curvature or displacement. In this regards, a computer program was developed which is the next generation of the aforesaid program with additional functionality and options. Triangulation of the section allows opportunity for cross-sectional geometry. Biaxial lateral curvature/displacement/force combined with any sequence of axial load provides opportunity to analyze the performance of a reinforced concrete column under any load and displacement path. Use of unconventional reinforcement, such as FRP, in lateral as well as longitudinal direction is another feature of this application.

[pt] Os problemas advindos da área de logística de transportes, em especial no que diz respeito ao uso racional de frotas de veículos, são amplamente estudados na área de otimização combinatória. A natureza intrinsicamente combinatorial desses problemas sugere que boa parte deles pode ser formulada e resolvida como um problema de programação linear inteira. Contudo, a maioria dos algoritmos atualmente disponíveis não consegue encontrar, em tempos computacionais aceitáveis, a solução ótima para instâncias de porte razoável. O sucesso desses algoritmos tem sido limitado, em parte devido ao fato dos mesmos não explorarem avanços recentes na área de programação linear inteira. Algumas dessas novas técnicas e suas aplicações a problemas de roteamento de veículos são o objeto de estudo desta dissertação. Primeiro são apresentadas as técnicas básicas de decomposição de problemas de programação linear e linear inteira e de geração de colunas. A resolução de problemas de programação linear inteira neste contexto é tratada em seguida, com a descrição do algoritmo branch-and-bound e das variações branch-and-cut, branch-and-price e branch-and- cut-and-price. Em seguida são descritos problemas de roteamento onde essa metodologia foi aplicada. Inicialmente, é apresentado o problema de roteamente do veículos com restrição de capacidade, o PRVC. Em seguida são apresentados problemas de roteamento de veículos com janela de tempo e frota heterogenea. Para cada problema, descrevemos como as técnicas descritas acima foram aplicadas e os resultados computacionais para um grande número de instâncias. Finalmente, no último capítulo, mostramos um caso real da aplicação do problema de roteamento de veículos com janela de tempo e frota heterogênea, que é o caso do problema de distribuição de jornais numa grande empresa de comunicação do Rio de Janeiro. / [en] Optimization techniques have an important role in Transportation Logistics. The combinatorial nature of several problems related to this area seggests integer programming as a natural approach to solve them. Nevertheless, there are many cases in which instances of reasonable size are still beyond the resolution capability of the algotithms presented in the literature. The sucess of the known algotithms have therefore been limited partly to the fact that most of them have not incorporated any recent relevant advances in the combinatorial optimization field. Some of these new techniques and their applications are the main subject of this dissertation. Firstly, basic decomposition techniques for linear and integer programming problems, as well as the relates column generation approach are addressed. This is followed by the presentation of a reformulation technique for linear and integer programming, which is alternative to the well known Dantzig-Wolfe master program. The new possibilities arousing from this approach are explored and the resulting consequences to the standard branch-and-bound algotithm and its variations branch-and- cut, branch-and-prince and branch-and-cut-and-price are presented. Later, routing problems where this methodology was applied were addressed with the capacitated vehicle routing problems - CVRP and followed by vehicle routing problems with time windows and heterogeneous fleet. For each problem, it is described how the techniques mentioned above were reported. Finally, in the last time windows and heterogeneous fleet, which is the case of a newspaper distribution in a major communication company in Rio de Janeiro.

abstract: This study was devised to elucidate key information concerning the potential risk posed by Legionella in reclaimed water. A series of biological experiments and a recharge basin soil column study were conducted to examine the survival, growth, and transport of L. pneumophila through engineered reclaimed water systems. A pilot-scale, column study was set up to measure Legionella transport in the columns under Arizona recharge basin conditions. Two columns, A and B, were packed to a depth of 122 cm with a loamy sand media collected from a recharge basin in Mesa, Arizona. The grain size distribution of Column A differed from that of Column B by the removal of fines passing the #200 sieve. The different soil profiles represented by column A and B allowed for further investigation of soil attributes which influence the microbial transport mechanism. Both clear PVC columns stand at a height of 1.83 m with an inner diameter of 6.35 cm. Sampling ports were drilled into the column at the soil depths 15, 30, 60, 92, 122 cm. Both columns were acclimated with tertiary treated waste water and set to a flow rate of approximately 1.5 m/d. The columns were used to assess the transport of a bacterial indicator, E. coli, in addition to assessing the study's primary pathogen of concern, Legionella. Approximately, 〖10〗^7 to 〖10〗^9 E. coli cells or 〖10〗^6 to 〖10〗^7Legionella cells were spiked into the columns' head waters for each experiment. Periodically, samples were collected from each column's sampling ports, until a minimum of three pore volume passed through the columns. The pilot-scale, column study produced novel results which demonstrated the mechanism for Legionella to be transported through recharge basin soil. E. coli was transported, through 122 cm of the media in under 6 hours, whereas, Legionella was transported, through the same distance, in under 30 hours. Legionella has been shown to survive in low nutrient conditions for over a year. Given the novel results of this proof of concept study, a claim can be made for the transport of Legionella into groundwater aquifers through engineering recharge basin conditions, in Central Arizona. / Dissertation/Thesis / Masters Thesis Civil and Environmental Engineering 2014

Master of Science / Department of Architectural Engineering and Construction Science / Donald J. Phillippi / Special moment resisting frames (SMRF) are intended to protect the structure from earthquake motions through a ductile inelastic response. This thesis evaluates the performance of reinforced concrete SMRFs with an emphasis on the second level beams. Due to previous research, it is concluded that two-dimensional finite element analyses (2D-FEA) and three-dimensional finite element analyses (3D-FEA) have different results when evaluating the same structure. Due to this, the thesis used a 3D-FEA to analyze frames based on Design Example 7 in the 2006 IBC Structural/Seismic Design Manual (Appendix A). While looking at the frame as a whole, the first of two parametric studies was performed over the columns. Using LS-DYNA the columns’ forces, displacement, moment, and curvature were evaluated. From these results, it was concluded that in SMRF, columns are not acting per current design assumptions due to the elongation of beams. Using the knowledge gained in the first parametric study, a second parametric study was performed on the second level floor beams. Focusing on the beam elongation, this thesis evaluates multiple frames with different load combinations using LS-DYNA to find the displacement of the reinforcement in the beams. With the results, an equation to calculate the elongation of beams was proposed, as well as an average percentage of the elongation in reinforced concrete SMRF. The equation and average percentage of elongation aim to provide a standard design consideration for the elongation of beams.

Orientador: João Guilherme Padilha Filho / Banca: Márcia Rita Fernandes Macahdo / Banca: Maria Angélica Miglino / Resumo: Objetivou-se neste trabalho avaliar a importância de intervenção cirúrgica precoce, em cães com discopatia tóraco-lombar (DTL), relacionando o tempo de recuperação (total ou parcial) da função locomotora, com o tempo de paralisia (TP) decorrido até o dia da cirurgia de fenestração tóraco-lombar (FTL), nos cães atendidos no HV-FCAV-UNESP de fevereiro de 2002 a novembro de 2006 . Foram incluídos 81 cães no estudo e classificados nos graus de lesão (GL) medular 1 a 5 e divididos em três grupos: GP (precoce), GI (intermediário) e GT (tardio) conforme o tempo decorrido do dia da paralisa até o dia da FTL. Destes, 74 obtiveram recuperação da função locomotora (RFL). Os cães foram avaliados quanto à correlação do TP com o tempo de recuperação dos movimentos voluntários (RMV) e RFL nos grupos GP, GI e GT, e também separadamente em cada GL. A análise estatística de todos os parâmetros foi realizada através do Teste de Fischer com nível de significância 5%. A raça mais prevalente foi a Teckel, com 78,3 % dos casos. O tempo de RMV em dias foi em média 8,84 l 11 para o GP, 9,18 l 8,6 para o GI e 27,71 l 21,6 para o GT. O tempo de RFL em dias foi em média 21,52 l 23,51 para o GP, 21,23 l 18,09 para o GI e 41,43 l 30,92 para o GT. À análise estatística verificou-se que existe relação entre RMV e TP com alto nível de significância (p = 0,002), mas não entre RFL e TP, pois o valor de p = 0,12. Concluiu-se que o tempo de RMV foi maior para os cães do GT, e o tempo de RFL foi maior, mas não estatisticamente significante, no GT comparado ao GP e GI. / Abstract: The aim of this study was to evaluate the relevance of early surgical intervention in dogs with thoracolumbar disc disease (TLDD) by relating the recovery period (total or partial) of locomotive function with the duration of the paralysis (DP) till the day of the thoracolumbar fenestration surgery (TLF) for dogs admitted at the Veterinary Teaching Hospital of the FCAVUNESP (HV FCAV-UNESP) from February 2002 to November 2006. It has been included in the study 81 dogs, all classified according to the degree of spinal cord lesion (DL) from 1 to 5 and then divided into early (EG), intermediary (IG) and late (LG) groups, in regard to the time elapsed from the day of the lesion until the day of the TLF. Among these animals, 74 had their locomotive function reestablished (LFR). The dogs had been evaluated for the correlation of DP with the time of recovery of voluntary movements (RVM) and LFR in the EG, IG and LG groups, besides a separate evaluation for each DL. Statistical analysis for all parameters was done by use of the Fischer Test, with 5% significance. Most prevalent breed was the Teckel with 78.3% of cases. Time for RVM had an average of 8.84l11 days for EG, 9.18 l 8.6 for the IG and 27.71l21.6 for the LG. Time for LFR had an average of 21.52 l 23.51 for the PG, 21.23 l 18.09 for the IG and 41.43 l 30.92 for the LG. Statistically was verified a correlation between RVM and DP with high level of significance (p=0.002) but none between LFR and DP, hence p=0.12. It has been concluded that time of RVM was longer for dogs in the LG and that the time of LFR was longer, although not statistically significant, in the LG when compared to the EG and IG. / Mestre

Os antigos e já bem desenvolvidos dispositivos para tratamentos e/ou análise de amostras têm sido grandemente estudados para novas adaptações, devido à importância de se construir sistemas miniaturizados. A obtenção destes sistemas miniaturizados baseia-se não apenas na construção ou metodologia, mas pode depender de modificação superficial para melhoria de desempenho ou diferenciação de aplicações. A modificação de superfície com filmes finos obtidos por plasma é bem conhecida na Microeletrônica. Assim, este trabalho teve como objetivo avaliar a possibilidade do uso da modificação superficial pela produção de filmes finos a partir da polimerização por plasma de Tetraetilortossilicato, TEOS - para fabricação de estruturas miniaturizadas, principalmente para retenção e/ou pré-concentração, em pré-tratamento de amostras ou mesmo para proteção de sistemas de detecção. A metodologia utilizada correspondeu a testes destes filmes em canais ou membranas seletivas. Quanto aos canais utilizou-se geometria planar e/ou tridimensional; as membranas foram testadas em geometria planar. Microcanais tridimensionais, usados tanto em fase gasosa como líquida, foram testados para determinação de retenção/pré-concentração de compostos orgânicos voláteis. Para testes de retenção de compostos inorgânicos em fase líquida (água como solvente) utilizaram-se não só microcanais, tridimensionais ou planares, como também membranas. Proteção de sistemas de detecção exigiu o uso de geometria plana. Quanto ao filme a base de TEOS, este foi testado imediatamente após a deposição, após envelhecimento por no mínimo seis meses ou após exposição a condições adversas como a que levam à hidrólise de radicais orgânicos presentes no filme, ou mesmo após hidrofobização da superfície, por exposição à Hexametildissilazana, HMDS. A construção de dispositivos, com canal planar ou tridimensional, permitiu o desenvolvimento de diferentes sistemas de tratamento, e respectivos métodos de análise, para separação, retenção e pré-concentração de amostras. Os resultados obtidos demonstraram que um dispositivo com canal tridimensional, tratado pela deposição a base de TEOS e posterior hidrólise do filme, permite a retenção de íons e formação de clusters de cobre, em fase líquida. Do mesmo modo, permite a separação de compostos orgânicos em pequena concentração e retenção de compostos polares, em fase gasosa. Para dispositivo planar foi observada a separação de íons através de estrutura plana, similar às utilizadas em eletrocromatografia. Os estudos processados permitiram propor pequenos dispositivos, de baixo custo e fabricação simples, que podem ser facilmente implantados na área de análises. Assim, o canal tridimensional testado tem comportamento semelhante ao de uma pré-coluna. Como é de simples construção e sua entrada e saída possui similaridades com uma pré-coluna comercial, a instalação desta pré-coluna em um cromatógrafo miniaturizado requererá poucas etapas. Essa nova pré-coluna também apresentaria grandes vantagens se fosse adicionada imediatamente antes de detectores não específicos, tais como os usados no nariz eletrônico. Pela diminuição de compostos presentes na mistura, as dificuldades de análise dos resultados igualmente decresce, pela maior facilidade de criação de padrões. / The long-established and well-known devices for sample pretreatment and/or analysis have been widely studied to new adaptations due to the miniaturization trend. The production of these miniaturized systems requires not only new approach on manufacturing and methodology but also depends on surface modification for performance improvement or new applications development. Surface modification using plasma-produced thin films is well established in Microelectronics. Therefore, the aim was to evaluate the use of Plasma polymerized Tetraethylorthosilicate surface modification on manufacturing of miniaturized structures. The main use of such a modification is on devices for sample pretreatment - retention, pre-concentration, or even for protecting detection system surface. The methodology carried out tested these thin films in channels and selective membranes. Whereas channels used three-dimensional and planar geometries, membranes were tested only with planar geometries. Three-dimensional microchannels, used in gaseous or liquid phase, were tested for retention/preconcentration of volatile organic compounds (VOCs). Retention of inorganic compounds in aqueous liquid phase was tested using not only three-dimensional and planar microchannels but also membranes. Protection of detection systems required planar geometry. TEOS thin film was tested after: deposition, ageing for several months; exposition to severe environmental conditions that leads to hydrolysis of organic radicals present in the film; surface hydrophobization due to hexamethyldisilazane, HMDS, exposure. Manufacturing of miniaturized three-dimensional and planar devices leads to some solutions on sample pretreatment and respective analysis methodology. These devices can be used for separation, retention and pre-concentration. The results pointed out that a threedimensional microchannel with plasma deposited TEOS film previously hydrolyzed allows ion retention and clusters formation in a copper aqueous solution. Furthermore, in gaseous phase, VOCs in small concentration can be separated whereas polar compounds can be retained. Planar device allows separation of inorganic ions in a structure similar to the ones used in electrochromatography. Small and low-cost devices are thus here provided, which can easily be machined and are very useful in the chemical analysis field. The three-dimensional microchannel presented behavior similar to the one of a chromatographic pre-column. This microchannel can also be easily adapted to a miniaturized chromatograph. Other possible use is in sample pretreatment, coupled ahead of non-specific detectors, such as electronic noise arrays, since it can decrease the numbers of compounds to be detected and, consequently, reduce drawbacks concerning results analysis.

Made available in DSpace on 2014-06-11T19:23:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-03-01Bitstream added on 2014-06-13T20:30:37Z : No. of bitstreams: 1 meirelles_vm_me_jabo.pdf: 771952 bytes, checksum: 1cbb6276883773e472d237ed567b3fd3 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Objetivou-se neste trabalho avaliar a importância de intervenção cirúrgica precoce, em cães com discopatia tóraco-lombar (DTL), relacionando o tempo de recuperação (total ou parcial) da função locomotora, com o tempo de paralisia (TP) decorrido até o dia da cirurgia de fenestração tóraco-lombar (FTL), nos cães atendidos no HV-FCAV-UNESP de fevereiro de 2002 a novembro de 2006 . Foram incluídos 81 cães no estudo e classificados nos graus de lesão (GL) medular 1 a 5 e divididos em três grupos: GP (precoce), GI (intermediário) e GT (tardio) conforme o tempo decorrido do dia da paralisa até o dia da FTL. Destes, 74 obtiveram recuperação da função locomotora (RFL). Os cães foram avaliados quanto à correlação do TP com o tempo de recuperação dos movimentos voluntários (RMV) e RFL nos grupos GP, GI e GT, e também separadamente em cada GL. A análise estatística de todos os parâmetros foi realizada através do Teste de Fischer com nível de significância 5%. A raça mais prevalente foi a Teckel, com 78,3 % dos casos. O tempo de RMV em dias foi em média 8,84 l 11 para o GP, 9,18 l 8,6 para o GI e 27,71 l 21,6 para o GT. O tempo de RFL em dias foi em média 21,52 l 23,51 para o GP, 21,23 l 18,09 para o GI e 41,43 l 30,92 para o GT. À análise estatística verificou-se que existe relação entre RMV e TP com alto nível de significância (p = 0,002), mas não entre RFL e TP, pois o valor de p = 0,12. Concluiu-se que o tempo de RMV foi maior para os cães do GT, e o tempo de RFL foi maior, mas não estatisticamente significante, no GT comparado ao GP e GI. / The aim of this study was to evaluate the relevance of early surgical intervention in dogs with thoracolumbar disc disease (TLDD) by relating the recovery period (total or partial) of locomotive function with the duration of the paralysis (DP) till the day of the thoracolumbar fenestration surgery (TLF) for dogs admitted at the Veterinary Teaching Hospital of the FCAVUNESP (HV FCAV-UNESP) from February 2002 to November 2006. It has been included in the study 81 dogs, all classified according to the degree of spinal cord lesion (DL) from 1 to 5 and then divided into early (EG), intermediary (IG) and late (LG) groups, in regard to the time elapsed from the day of the lesion until the day of the TLF. Among these animals, 74 had their locomotive function reestablished (LFR). The dogs had been evaluated for the correlation of DP with the time of recovery of voluntary movements (RVM) and LFR in the EG, IG and LG groups, besides a separate evaluation for each DL. Statistical analysis for all parameters was done by use of the Fischer Test, with 5% significance. Most prevalent breed was the Teckel with 78.3% of cases. Time for RVM had an average of 8.84l11 days for EG, 9.18 l 8.6 for the IG and 27.71l21.6 for the LG. Time for LFR had an average of 21.52 l 23.51 for the PG, 21.23 l 18.09 for the IG and 41.43 l 30.92 for the LG. Statistically was verified a correlation between RVM and DP with high level of significance (p=0.002) but none between LFR and DP, hence p=0.12. It has been concluded that time of RVM was longer for dogs in the LG and that the time of LFR was longer, although not statistically significant, in the LG when compared to the EG and IG.

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