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Consider the effects of strong aftershocks continuous rigid frame bridge seismic performance assessment methods

Author: XiongRen
Tutor: YuQiCai；LiuAiRong
School: Guangzhou University
Course: Bridge and Tunnel Engineering
Keywords: Earthquake Continuous Rigid Frame Bridge Strong aftershocks Energy Method Displacement method Earthquake damage model
CLC: U442.55
Type: Master's thesis
Year: 2011
Downloads: 65
Quote: 0
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Abstract


Continuous rigid frame bridge an important member of the family as a bridge , the seismic performance of the current bridge seismic research focus. Aiming at the continuous rigid frame bridge the lack of seismic performance evaluation method based on energy and the displacement method , taking into account the impact of strong aftershocks , made ​​under the influence of strong aftershocks continuous rigid frame bridge seismic performance of the dual-index assessment. In this paper are as follows: ( 1 ) Pursuant to the Master , aftershock magnitude relations , seismic peak acceleration , holding time and site soil characteristics , epicenter , magnitude and statistical formulas regression coefficients discussed the synthesis of strong aftershocks ; and based on the energy equivalent principles and spectral intensity factor and magnitude , epicentral distance and hold the relationship , the main shock and strong synthetic equivalent duration of aftershock seismic waves . ( 2 ) introduction of a single degree of freedom vibration energy equation and its solution process , the use of three groups of typical seismic structure of single degree of freedom time history analysis , seismic wave and peak velocity , holding time and spectral characteristics of the seismic response of SDOF pier the impact of laws, and on this basis, analyzes the structure of strong aftershocks on SDOF hysteretic energy , damping energy and total input energy is studied. ( 3 ) establish a continuous rigid frame bridge finite element model of a multi- degree of freedom and simplify the structure , seismic time-history analysis, proposed continuous rigid frame bridge energy response calculation method to analyze the bridge design parameters, such as bridge pier height , reinforcement ratio for continuous rigid frame bridge seismic performance, and reveals the strong aftershocks of the continuous rigid frame bridge seismic force, displacement and energy response were investigated. ( 4 ) through a lot of the main duration of aftershock seismic waves and the equivalent continuous rigid frame bridge time history analysis , the use of Park-Ang damage model to calculate its index , and the introduction of incremental displacement and hysteretic energy factor , determined incremental factor magnitude of the statistical relationship is proposed to consider the impact of strong aftershocks energy two-parameter deformation and seismic damage model, and through a numerical example to verify the reliability of the model .

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CLC: > Transportation > Road transport > Bridges and Culverts > Investigation, design and calculation > Bridge Design > Damage Analysis and Seismic Design
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