Unification in the design of four-span continuous bridges

The article deals with the creation of continuous metal and monolithic reinforced concrete bridge span structures, which are the most efficient. Efficiency is achieved by searching for opportunities to unify structures with the most successful options for providing them with the required load-bearing capacity with the lowest cost of building materials. If a certain coefficient of the length of the extreme relative to the average is introduced, there can be achieved the equality of the transverse moments of spans. Such performance of the structure will allow building the bridge span as if combined from three types of unified blocks, which would reduce the labor complexity and the cost of construction work.

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Optimal ratio of spans of continuous bridges

E3S Web of Conferences ◽

10.1051/e3sconf/202126303001 ◽

2021 ◽

Vol 263 ◽

pp. 03001

Author(s):

Aleksander Makarov ◽

Sergey Kalinovsky ◽

Natalia Ermilova ◽

Alexey Churakov

Keyword(s):

Building Materials ◽

Bending Moments ◽

Construction Work ◽

Load Bearing Capacity ◽

Reinforced Concrete Bridge ◽

Bridge Span ◽

Effective Efficiency ◽

Bridge Spans ◽

Cost Of Construction ◽

Continuous Metal

The article deals with the creation of continuous metal and monolithic reinforced concrete bridge spans, which are the most effective. Efficiency is achieved by finding opportunities for the unification of structures with the most successful options for providing them with the required load-bearing capacity with the lowest cost of building materials. The bending moments that occur in the sections of a continuous structure are distributed more evenly and take on smaller values in the span than in a split structure. However, the efficiency of continuous structures can be further improved by introducing a certain coefficient of the length of the extreme spans of the bridge relative to the average ones. This allows you to achieve equality of the reference or span bending moments. As a result, the design will work in such a way that it will be possible to build the bridge span as if from three types of unified blocks, which will reduce the complexity and cost of construction work. As an example, in this case, the ratio of spans and the corresponding division into blocks for four-span continuous bridges are determined.

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Probabilistic Assessment of Historic Reinforced Concrete Bridge

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.821.767 ◽

2016 ◽

Vol 821 ◽

pp. 767-773

Author(s):

Jan Krejsa ◽

Miroslav Sýkora ◽

Michal Drahorád

Keyword(s):

Reinforced Concrete ◽

Bearing Capacity ◽

Probabilistic Method ◽

Concrete Bridge ◽

Load Bearing Capacity ◽

Load Bearing ◽

Reinforced Concrete Bridge ◽

Factor Method ◽

Partial Factor Method ◽

Partial Factor

This paper is aimed at the reliability analysis of an existing reinforced concrete bridge from 1908. The load bearing capacity is assessed in accordance with valid standards using the partial factor method and probabilistic approach. Load bearing capacities obtained by these methods are critically compared. The application of probabilistic method leads to 40 % higher load bearing capacity then the partial factor method used for structural design.

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Research on Intelligent Evaluation System of Load-bearing Capacity of Existing Reinforced Concrete Bridge

E3S Web of Conferences ◽

10.1051/e3sconf/202016504056 ◽

2020 ◽

Vol 165 ◽

pp. 04056

Author(s):

An Zhao ◽

Qiang Xu ◽

Jianyong Song

Keyword(s):

Reinforced Concrete ◽

Bearing Capacity ◽

Evaluation System ◽

Limit State ◽

Concrete Bridge ◽

Parametric Modelling ◽

Limit States ◽

Load Bearing Capacity ◽

Load Bearing ◽

Reinforced Concrete Bridge

The intelligent evaluation system of existing reinforced concrete bridge “BLP” is a special software for the load-bearing capacity rapid analysis and evaluation of the existing reinforced concrete bridge, which was developed by the Highway Research Institute of the Ministry of Transport. Based on the parametric modelling method, it can quickly and easily establish the finite element plane model of the bridge structure for the static analysis of ultimate bearing capacity limit states and serviceability limit state, under variety norms. And it can easily and quickly build variable-section beams and rebars, with the special module. According to the comprehensive modification method of the load-bearing capacity evaluation, it can automatically recommend checking sections, and automatically calculate partial modification coefficient of resistance effect, and conveniently judge the safety coefficient of the sections, and quickly get the results of bridge load-bearing capacity. In summary, this system can significantly improve the work efficiency and accuracy of load-bearing capacity for exiting reinforced concrete bridge. This paper introduces in detail the characteristics of the intelligent analysis technology, calculation principle and real bridge application examples of the system.

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Updating Material Factors for Assessment of Historic Reinforced Concrete Bridge

Transactions of the VŠB - Technical University of Ostrava Civil Engineering Series ◽

10.1515/tvsb-2016-0004 ◽

2016 ◽

Vol 16 (1) ◽

pp. 21-28

Author(s):

Jan Krejsa ◽

Miroslav Sýkora

Keyword(s):

Reinforced Concrete ◽

Bearing Capacity ◽

Structural Design ◽

Concrete Bridge ◽

Load Bearing Capacity ◽

Load Bearing ◽

Reinforced Concrete Bridge ◽

Design Load ◽

Partial Factor Method ◽

Partial Factor

Abstract This paper is focused on the reliability analysis of an existing reinforced concrete bridge from 1908. The load bearing capacity is assessed in accordance with valid standards using updated partial factors and the partial factors for structural design. Load bearing capacities obtained by these methods are critically compared. The application of the updated partial factors leads to 15% higher load bearing capacity than the ordinary partial factor method used for structural design.

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