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Global Probabilistic Seismic Capacity Analysis of Reinforced Concrete Frame Structures

Author: YuXiaoHui
Tutor: LvDaGang
School: Harbin Institute of Technology
Course: Structural Engineering
Keywords: Performance - based earthquake engineering Based on the consequences of the earthquake engineering Risk - based earthquake engineering Probabilistic seismic capacity analysis Random Pushover Analysis Finite element reliability analysis Vulnerability analysis of the seismic capacity Risk analysis of the seismic capacity
CLC: TU375.4
Type: Master's thesis
Year: 2007
Downloads: 515
Quote: 5
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Abstract

The beginning of the 21st century, the U.S. Pacific Earthquake Engineering Research Center (Pacific Earthquake Engineering Research Center, PEER) put forward a new generation of \Research Center (Mid-American Earthquake Engineering, MAE) proposed probabilistic framework for decision-making based on the consequences of the earthquake engineering (Consequence-Based Earthquake Engineering, CBEE) \These two frameworks are established on the basis of seismic risk analysis, to this end, this paper put forward a \Ground motion (Earthquake Motion), the seismic demand (Seimsic Demand) and seismic capacity (Seimsic Capacity) and the relationship between them is PBEE, CBEE, and RBEE the three core issues of common concern. Due to the randomness of earthquake ground motion random process engineering structures parameters randomness, the seismic capacity of the structure is essentially random, probabilistic relationship between study structural seismic demand seismic capacity discipline called \seismic capacity analysis (Probabilsitic Seismic Capacity Analysis, PSCA) \Probabilistic seismic capacity analysis of engineering structure seismic reliability analysis, structural seismic vulnerability analysis and structural seismic risk analysis based on the same time, the important part of the structure probabilistic seismic performance design and probabilistic seismic performance assessment is also full probabilistic methods ; In addition, the results of probabilistic seismic capacity analysis for earthquake loss estimates and Earthquake Disaster Mitigation Decision scientific basis. Structure overall seismic capability from macro to characterize the seismic performance of major civil engineering structures and infrastructure systems Global probabilistic seismic capacity analysis, not only has an important theoretical significance, but also has important practical value. This paper studies the complex analysis of the statistical moments of the random function, the point estimate method based Nataf transformation; same numerical examples, the point estimate method with Monte Carlo simulation, numerical integration method, and the average time of two order moment method are compared; Then, the statistical moments of the random function analysis method and Pushover analysis combined proposed random Pushover analysis method; parameters as the structure of the overall capacity to maximum story drift angle (Inter-Storey Drift Angle, ISDA), then two angles from random Pushover analysis and finite element reliability analysis, the overall probability of the reinforced concrete frame structure seismic capacity model; venue on this basis, combined with seismic hazard, risk and the overall probability seismic capacity of the structure as a whole probabilistic seismic capacity of the vulnerability of the system in-depth analysis. Following conclusions: (1) improved point estimate method proposed in this paper can improve the precision of the point estimate method Zhao-Ono; most efficient on MVFOSM's, but with less accuracy, especially when a higher degree of random nonlinear function; the accuracy of the point estimate method of numerical integration method fairly, its efficiency is higher than the point estimate method. (2) random Pushover analysis method and finite element reliability analysis method can be used to calculate the statistical moments of the structure of the overall capacity. Random Pushover analysis method statistical moments of the random function analysis method combined with traditional Pushover analysis solution the implicit function encountered in the statistical analysis of the structure of the overall capacity is difficult to deal with difficulties; finite element reliability analysis methods to structure approximate analytical method and finite element analysis and finite element reliability reaction sensitivity analysis combining essentially a stochastic finite element method, can be refined to simulate various uncertainties in the structural model. (3) the structure of the overall seismic capacity based on the statistical moments of the probability model and based on the reliability of the regression model, the results exist some differences. The former is based on the structural capacity parameters obey a lognormal distribution assumption, the assumption of \\(4) The structure of the probabilistic seismic capacity model only consider the structure parameter uncertainty, vulnerability model of the seismic capacity further consider the randomness of ground motion parameters. Obviously, the latter is a further extension of the former. (5) the risk of seismic capacity vulnerability analysis based on seismic capacity, considering the dangerous nature of the venue. Therefore, the risk analysis of the seismic capacity of the structure is a further extension of the analysis of seismic capacity.

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CLC: > Industrial Technology > Building Science > Building structure > Concrete structure,reinforced concrete structure > Reinforced concrete structures > Frame
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