Chapter 9 Basis for partial factor design and reliability analysis

2002 ◽  
pp. 127-149
Keyword(s):  
Reliability Analysis ◽  
Factor Design ◽  
Partial Factor

scholarly journals Comparison of reliability evaluation methods between China and Canada standards for wood structures featuring duration of load

2020 ◽  
Vol 66 (1) ◽  
Author(s):  
Qiongyao Wu ◽  
Shuang Niu ◽  
Enchun Zhu
Keyword(s):  
Reliability Analysis ◽  
Analysis Method ◽  
Safety Level ◽  
Wood Structures ◽  
Load Effect ◽  
Key Factor ◽  
Live Loads ◽  
High Level ◽  
Partial Factor ◽  
Duration Of Load

Abstract Duration of load (DOL) is a key factor in design of wood structures, which makes the reliability analysis of wood structures more complicated. The importance of DOL is widely recognized, yet the methods and models through which it is incorporated into design codes vary substantially by country/region. Few investigations of the effect of different model assumptions of DOL and other random variables on the results of reliability analysis of wood structures can be found. In this paper, comparisons are made on the reliability analysis methods that underlie the China and the Canada standards for design of wood structures. Main characteristics of these two methods, especially the way how DOL is treated are investigated. Reliability analysis was carried out with the two methods employing the same set of material properties and load parameters. The resulted relationships between reliability index β and resistance partial factor γR* (the β–γR* curves) for four load combinations are compared to study the safety level indicated by the two methods. The comparison shows that the damage accumulation model (Foschi–Yao model) in the Canada analysis method is highly dependent on the type and duration of load, resulting in more conservative design than the China analysis method in loading cases dominated by dead load, but less conservative design in cases of high level of live loads. The characteristics of the load effect term of the performance function are also found to make considerable difference in reliability levels between the two methods. This study aims to provide references for researchers and standard developers in the field of wood structures.

Determination of the Optimum Partial Factors in Structural Reliability Analysis

1998 ◽  
Vol 05 (02) ◽  
pp. 169-180 ◽  
Author(s):  
D. H. Li ◽  
C. Y. Tang ◽  
M. Jie ◽  
Albert H. C. Tsang ◽  
Y. C. Tsim
Keyword(s):  
Objective Function ◽  
Reliability Analysis ◽  
Structural Reliability ◽  
Optimization Method ◽  
Design Criterion ◽  
Resistance Force ◽  
Reliability Design ◽  
Structural Reliability Analysis ◽  
Live Loads ◽  
Partial Factor

In this paper, an optimization method is used to determine the values of partial factors in structural reliability analysis. Once the proper objective function is defined, a group of optimum partial factors, which enable the objective function to take its minimum value, will need to be determined. In the present study, two kinds of objective function are considered. The conditions that have to be satisfied for optimum partial factors of these two kinds of objective function are then derived. In both cases, the result shows that the partial factors of both dead and live loads should satisfy the same proportional expression and should be inversely proportional to the partial factor of resistance force. A simple beam is used as an example to illustrate the computations involved. It is found that the design concept proposed in this paper leads to a design criterion similar to that which applies to the conventional deterministic method. Thus, this concept can be easily used in practice. The illustrative example shows that the values of the dead load and live load have a significant effect on the reliability design criteria.

scholarly journals SOME DISCUSSIONS TOWARD THE IMPLEMENTATION OF PARTIAL FACTOR DESIGN OF FOUNDATIONS

2004 ◽  
pp. 315-320
Author(s):  
Jiro FUKUI ◽  
Masahiro ISHIDA ◽  
Masahiro SHIRATO ◽  
Kenji MATSUI
Keyword(s):  
Factor Design ◽  
Partial Factor

scholarly journals A STUDY ON PARTIAL FACTOR DESIGN OF OPEN-TYPE WHARF ON VERTIAL PILES BASED ON CALIBRATION

2007 ◽  
Vol 63 (2) ◽  
pp. 566-576
Author(s):  
Kiyoshi AMMA ◽  
Yoshiaki KIKUCHI ◽  
Takashi NAGAO ◽  
Makoto SUZUKI ◽  
Munehisa FUJITA ◽  
...  
Keyword(s):  
Open Type ◽  
Factor Design ◽  
Partial Factor
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