Reliability analysis of wind load for long-span bridges

In this paper, first order reliability method (FORM) is generalized to the seismic reliability analysis of long-span bridges and the first excursion probability of a single tower cable-stayed bridge is studied. The seismic motivation is firstly dispersed as a series of random variables. Then the cross velocities on the dispersed time points can be obtained by solving the motivation of the design checking points with FORM. The upper bound of first excursion probability is also obtained by integrating the cross velocities at different time. The results show that the seismic reliability analysis method based on the FORM is feasible and effective to solve the first excursion probability problem. The single tower cable-stayed bridge studied in this paper has a higher reliability under strong seismic.

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Development of computational software for flutter reliability analysis of long span bridges

Wind and Structures ◽

10.12989/was.2012.15.3.209 ◽

2012 ◽

Vol 15 (3) ◽

pp. 209-221

Author(s):

Jin Cheng

Keyword(s):

Reliability Analysis ◽

Long Span Bridges ◽

Long Span

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Aerostatic Reliability Analysis of Long-Span Bridges

Journal of Bridge Engineering ◽

10.1061/(asce)be.1943-5592.0000069 ◽

2010 ◽

Vol 15 (3) ◽

pp. 260-268 ◽

Cited By ~ 12

Author(s):

Cheng Su ◽

Xiufeng Luo ◽

Tianquan Yun

Keyword(s):

Reliability Analysis ◽

Long Span Bridges ◽

Long Span

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Durability limit states and reliability analysis of concrete components in long-span bridges

Maintenance, Monitoring, Safety, Risk and Resilience of Bridges and Bridge Networks ◽

10.1201/9781315207681-276 ◽

2016 ◽

pp. 458-458

Author(s):

Pu Wei ◽

Rucheng Xiao ◽

Bin Sun ◽

Dongli Zhuang

Keyword(s):

Reliability Analysis ◽

Limit States ◽

Long Span Bridges ◽

Long Span

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Design Wind Speed Estimation for Long Span Bridges in Korean Southern and Western Coasts

International Journal of Engineering and Technology Innovation ◽

10.46604/ijeti.2020.3545 ◽

2020 ◽

Vol 10 (2) ◽

pp. 146-155

Author(s):

Dooyong Cho

Keyword(s):

Wind Speed ◽

Least Squares ◽

Return Period ◽

Least Squares Method ◽

Wind Load ◽

Suspension Bridges ◽

Method Of Moment ◽

Long Span Bridges ◽

Wind Speeds ◽

Long Span

Recently, many long-span cable supported bridges, including the cable stayed bridges and the suspension bridges, have already been constructed or are planned for construction. Because the meteorological values used to estimate the wind load for designing the long-span bridges were based on data from the 1960s through 1995 in Korea, it is necessary to reconsider the proper design wind load for long-span bridges. In this paper, the research area is confined to the southern and western coasts of Korea where many long-span bridges have been built. The method of moment and the least-squares method are used to estimate the expected wind speeds of a 100-year return period for girder bridges; Gumbel’s distribution is used to estimate the expected wind speeds of a 200-year return period for long-span bridges. As the return period wind speed on the land surface is revised because of recent high-speed velocity, the revised return period wind speed is increased by 17%. The compatibility of return period wind speed is also evaluated using the RMS (root mean square) error method. This paper concludes that the least-squares method is more compatible than the method of moment for the case of the southern and western coasts of Korea.

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