1 and 21 highlights the nonlinear static pushover analysis. It is an efficient method for the performance evaluation of a structure subjected to seismic loads. Also ATC40 covers step by step procedures for pushover analysis to determine the capacity curve, capacity spectrum method and displacement coefficient method were briefly elaborated. By using these procedures this report is detailed with modeling aspects of the hinge behavior, acceptance criteria and locate the performance point. Hence, ATC40 serves as guideline for the starting of seismic evaluation process.
Seismic performance evaluation of setback buildings using nonlinear static and dynamic methods Shibajee Sutar1, Lipika Halder2* Graduate Student, Department of Civil Engineering, National Institute of Technology Agartala, India, 799046 email@example.com 2*Assistant Professor, Department of Civil Engineering, National Institute of Technology Agartala, India, 799046 firstname.lastname@example.org Abstract: Three ten-storey reinforced concrete framed buildings comprising of one regular in elevation and two setbacks at different level are considered in this study to address the seismic response of vertically irregular buildings. Both inelastic static and dynamic analysis are performed considering three different load patterns and an ensemble of 4
Nonlinear static pushover analysis carried out for default-hinge properties, M, PM, V and P hinges are applied to beam, column and strut in some programs based on the FEMA-356 and ATC-40 guidelines. While such documents provide the hinge properties for several ranges of detailing, programs may implement averaged values. The performance of building frames were compared with bare frame, in terms of ductility, safety, and
The worst case scenario is considered for all the above case. The dynamic load transfer and lateral load transfer are calculated to apply loads for analysis. Modal analysis is done with three types of assumption. Initially the analysis are done by applying loads to the suspension mounting points(translational) , later the whole space frame is considered as the torsional bar and finally both translational and torsional are combined together for the analysis. Keywords — Finite element model, chassis,
At the system level, the probability of the entire ERP system usage failure can be obtained by quantitative evaluation of the fault tree, thus making it possible for executives of the hosting organisation to make informed decisions on ERP project initiation, termination and high-level system requirement and scope changes. At the component level, the implications of fault tree analysis depend on the approach that was adopted in fault tree construction. There are two basic approaches, which a third one is the mix of them. The difference in these two approaches is that the second requires one to incorporate the root causes to component failures into the fault tree and thus directly assess the impact of these root causes on system failure, while the first approach indicates that the causes are either too elusive to be included in the fault tree or will be identified on a later
ABSTRACT In this research effort, the Mechanism of dynamic stall has been investigated, to gain more insight in to the events that lead to its occurrence. Numerical flow simulations based on the solution of RANS equations are carried out for this study, using a solver based on the Beam-Warming approximate factorization technique. Dynamic stall occurrence on constant-rate pitching NACA 0012 airfoil was studied in detail. The force, moment coefficients and detailed flow structures were studied in conjunction with the existing vortical theory to provide insights into these events. It was convincingly established that the sudden changes in the behavior of the force and moment coefficients are caused due to the shedding of the clockwise (negative)
For example, with the longitudinal design, Houle and Warner will be able to truly show whether a students’ failure to complete their college degree precedes the event of boomeranging. By comparison, with a cross sectional design, it is impossible to determine which variable occurs first. Therefore, based on the results of their longitudinal study, Houle and Warner will be able make claims and arguments with some more
Like as mentioned above, how the centripetal forced varies inversely to the radius and varies directly to the square of the velocity. In addition to that, the students must also understand thar the tension (or the weight) serves as the balancing forced needed to keep the stopper moving in a circular path. By doing this experiment, they were able to further understand the basis of the formula of centripetal acceleration. Furthermore, knowing how the formula works will help in conceptualizing the problems. References: "Khan Academy", Khan Academy, 2017.
The bending scale factor is calculated using the relation moment in Prototype /Moment in model. This Scale Factor is applied to the real time bridges which having the same geometry and loading conditions. Fig 3: Model Detailing The prototype model of concrete bridge cast for the critical load obtained. A single pier with beam deck of the bridge is designed. Three numbers of samples were cast and are kept in curing tank.
Chapter I Introduction I.1. Overview Mechanical, aeronautical or civil structures need to be lighter, stronger and more flexible because of the demands of safety and reliability. Furthermore predicting the response of a structure to an excitation is so critical. Because of these facts, vibration analysis of structures become a popular subject for engineers. Making experiments on a structure, constructing a mathematical model, controlling the structure or designing strong and stabilized structures are the main studies of vibration analysis.