Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 42 for “"nonlinear static"”.
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Nonlinear static and transient analysis of generally laminated beams
… developed. Both theories account for geometric nonlinearities, a parabolic shear strain distribution through the thickness, and satisfy the shear stress free boundary conditions at the upper and lower surfaces of the beam. The theories also account for the bend-stretch, shear-stretch, and …
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An overdamped multimodal adaptive nonlinear static procedure for seismic assessment of rc infilled frames
… the improved capacity of the upgraded building. Nonlinear dynamic analysis is widely recognised as the most accurate tool to predict the seismic behaviour of structures. However, this type of analysis has a high computational cost, and it is not an approach that can be extensively applied for …
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Local Continuum Sensitivity Method for Shape Design Derivatives Using Spatial Gradient Reconstruction
… a variety of applications, including linear and nonlinear static beam bending, linear and nonlinear transient gust analysis of a 2-D beam structure, linear and nonlinear static bending of rectangular plates, linear and nonlinear static bending of a beam-stiffened plate, and two-dimensional …
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Seismic Design and Evaluation of Multistory Buildings Using Yield Point Spectra
… presented. The method may be considered a new nonlinear static procedure (NSP). Interstory drift indices (IDIs) are estimated using deformed shapes of the building based on the first mode shape and combinations of the first and second mode shapes.
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Vibrações de estruturas aporticadas espaciais estaiadas
A numerical tool for geometric nonlinear static and linear dynamic analysis of stayed spatial frame structures is presented. The numerical procedures and modelling technics are developed towards near future analysis of long span stayed bridges. The developed approach mapes use of well established …
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Performance-based earthquake engineering with the first-order reliability method
… the applicability of FORM to the linear and nonlinear finite-element structural models under static and dynamic loading is investigated. The case studies indicate that FORM is applicable for linear and nonlinear static problems. Strategies are proposed to circumvent and remedy potential …
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Seismic Rehabilitation of Steel Moment Frames Vulnerable to Soft-Story Failures Through Implementation of Rocking Cores
… earthquake force to the system. In addition, nonlinear static pushover analyses are performed to address the beneficial contribution of the RC to the system under the performance objectives including immediate occupancy, life safety, and collapse prevention. The Monte-Carlo simulation …
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Aplicação do método da superposição modal na análise estática não linear de estruturas
… utilized as an efficient procedure for geometric nonlinear static analysis of thin-type structures with a mild nonlinear pre-buckling behaviour. This work presents a modal method extension where both geometric and physical nonlinearities are considered. For problems which the mild nonlinearity …
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Flexural Behavior of Interlocking Compressed Earth Block Shear Walls Subjected to In-Plane Loading
… strength of flexure dominant ICEB walls: a nonlinear static analysis model assuming lumped plasticity and a plastic analysis model. In addition, incremental dynamic analysis was conducted to address the seismic performance of flexure dominant ICEB buildings. Based on the database from the …
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Performance-Based Analysis of Steel Buildings: Special Concentric Braced Frame
… office building was evaluated using linear static, linear dynamic, nonlinear static, and nonlinear dynamic procedures. The results showed that the linear procedures underestimated damage compared to the nonlinear procedures, with the building performing to Life Safety for the linear …
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Análise estática não-linear geométrica de estruturas pelo método de superposição modal com base Lanczos-Ritz
… mode superposition as a procedure for geometric nonlinear static analysis of slender structures, and to examine, as an alternative to a modal basis, the use of a coordinates transformation constitutes by vectors produced in a non-iterative way from a Lanczos algorithm. In the method of buckling …
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Performance assessment of special concentrically-braced frames in moderate seismic regions
… conducted using the frame models to performing nonlinear static and nonlinear dynamic analyses. Nonlinear static analyses are conducted as a preliminary assessment of the behavior of CBFs, and they are employed to identify the sources of lateral load resistance and ductility. Nonlinear dynamic …
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Large deformation behavior of long shallow cylindrical composite panels
… are ·derived using laminated plate theory, nonlinear strain-displacement relations, and applying variational principles. The response is investigated for the case of a panel loaded exactly at midspan and for a panel with the load offset from midspan. The mathematical formulation is …
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Influence of Diaphragm Flexibility on the Out -of -Plane Dynamic Response of Unreinforced Masonry Walls
… results are compared with those simulated using nonlinear single-degree-of-freedom (SDOF) and multi-degree-of-freedom (MDOF) computational models. The validated models are useful for establishing, through a parametric study, that permissible limits on wall slenderness as prescribed by current …
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A Study of the Seismic Performance of Early Multi-Story Steel Frame Structures with Unreinforced Masonry Infill
… building was analyzed using modal and nonlinear static procedures based on currently accepted evaluation guidelines. Nonlinear results from the computer model were compared with calculated target displacements for seventeen cities likely to have steel frame construction with …
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Geometrically Nonlinear Analysis of Axially Symmetric, Composite Pressure Domes Using the Method of Multiple Shooting
… is presented of the linear and geometrically nonlinear static response of "thin" doubly-curved shells of revolution, under internal pressure loading. The analysis is based upon direct numerical integration of the governing differential equations, written in first-order state vector form. It is …
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Seismic stability of buckling-restrained braced frames
… the collapse performance was evaluated through nonlinear static and dynamic analyses that were used to investigate the inelastic behavior and determine the collapse fragility of each considered prototype. Several design prototypes, with different number of stories, were developed to study …
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Modal pushover analysis for high-rise buildings
Pushover analysis is a nonlinear static analysis tool widely used in practice to predict and evaluate seismic performance of structures. Since only the fundamental mode is considered and the inelastic theorem is imperfect for the conventional pushover analysis, a modified Modal Pushover Analysis …
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Geometrically nonlinear analysis of layered anisotropic plates and shells
… is developed, and its use in the geometrically nonlinear, static as well as dynamic, analysis of layered composite plates and shells is demonstrated via several example problems. For comparison purposes, a two-dimensional finite element based on the Sanders shell theory with the von Karman …
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Using Pulse R -Factors to Estimate Structural Response to Earthquake Ground Motions
… ""equivalent"" SDOF systems in conjunction with nonlinear static (pushover) analyses. Estimates of interstory drifts are made based on combinations of the first two modes, assuming their responses to be independent. It is found that reasonably good estimates of peak roof displacement can be made …
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