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Nonlinear Analysis Numerical Simulation and Preliminary Antiseismic Performance Analysis of Prestressed Concrete Frame Structure Based on OpenSees

Author: LiShaoWei
Tutor: JianBin
School: Chongqing University
Course: Structural Engineering
Keywords: Prestressed concrete Frame structure OpenSees Seismic response Nonlinear
CLC: TU311.3
Type: Master's thesis
Year: 2009
Downloads: 607
Quote: 6
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Abstract


Open large object-oriented finite element structural analysis software OpenSees, because of its powerful analysis features and open nature, to become one of the most suitable for the analysis of nonlinear seismic response of building structures software. However, the software is mainly used in non-prestressed structural analysis, this paper will be developed for use in the seismic performance of prestressed concrete structures, and lay a good foundation for the subsequent large prestressed concrete frame structure seismic capacity. Based on the theory of the prestressing tendons two-stage principle, the use of the OpenSees prestressed concrete frame structure nonlinear analysis of numerical simulation, cyclic loading test modeling, and seismic wave input nonlinear time history analysis of prestressed concrete structures, fortification intensity is 8 degrees (seismic level one) multi-layer multi-span prestressed concrete structure of nonlinear dynamic time-history analysis of the results of the preliminary study, the following conclusions: (1) the the prestressing tendons two-stage work The principle theory is applied to the seismic response of prestressed concrete structures, with reasonable accuracy considering the prestress and solving the corresponding prestressing steel constitutive relationship with the analysis of reinforced concrete structures, the analysis of prestressed concrete members, analog prestressed effect; (2) prestressed concrete frame structure cyclic loading test modeling, and seismic wave input nonlinear time history analysis showed that, based on section fiber model large finite element structural analysis software OpenSees equally suitable for pre-stressed seismic response analysis of concrete structures; (3) fortification intensity of 8 degrees of multi-layer multi-span prestressed concrete frame structure nonlinear dynamic time history analysis results show that the prestressed concrete frame structure column foot its weak link, it may be earlier onset of plasticity hinge; internal forces in the elastic-plastic state of the prestressed frame structure with elastic state redistribution are quite different, is the main cause underlying column feet first hinge; (4) designed in strict accordance with the national standard 8 degrees fortification intensity seismic rating for an eight-story two-span prestressed frame structure 8 degrees rare earthquake larger structural resistance to withstand earthquakes, and has a large strength reserves; partially prestressed concrete frame structure in the rare earthquake capable of forming an end of the beam-based and plastic hinge energy dissipation mechanism underlying in-column foot, has good seismic capacity.

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CLC: > Industrial Technology > Building Science > Building structure > Structure theory to calculate > Structural Mechanics > Structural Dynamics
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