<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Cantilever concreting technology is one of the modern methods of constructing concrete long-span bridges. Characteristic feature of those bridges is the long-term span deflection resulting from the rheological processes in the concrete and in the pre-tensioning steel. It can also be caused by the material deterioration, e.g. concrete cracking, as well as the changes in the bridge structure, such as the support settlements. The aggregate result of bridge exploitation are the changes in its grade line, considered in this paper as the bridge span deflection line. The aim of the paper is the assessment of the internal forces on the basis of the bridge span deformation. Furthermore, an algorithm for the correction of the deflection function determined on the basis of surveying measurements (low precision measurements) is proposed. It is characterized by a significant improvement of the computational results, and it hardly “smoothens” the primary measurement results. The algorithm can be used to analyse the selected part of the bridge structure, e.g. the longest span. The paper proposes a universal coefficient of cantilever deflection, which is calculated on the basis of the cantilever joint moment when the final static scheme of the bridge is created. It can be used for the comparative analyses of various bridges. The value of the coefficient is dependent on the geometry of the cantilever box cross-section only.</p>
</abstract>

Cantilever concreting technology is one of the modern methods of constructing concrete long-span bridges. Characteristic feature of those bridges is the long-term span deflection resulting from the rheological processes in the concrete and in the pre-tensioning steel. It can also be caused by the material deterioration, e.g. concrete cracking, as well as the changes in the bridge structure, such as the support settlements. The aggregate result of bridge exploitation are the changes in its grade line, considered in this paper as the bridge span deflection line. The aim of the paper is the assessment of the internal forces on the basis of the bridge span deformation. Furthermore, an algorithm for the correction of the deflection function determined on the basis of surveying measurements (low precision measurements) is proposed. It is characterized by a significant improvement of the computational results, and it hardly “smoothens” the primary measurement results. The algorithm can be used to analyse the selected part of the bridge structure, e.g. the longest span. The paper proposes a universal coefficient of cantilever deflection, which is calculated on the basis of the cantilever joint moment when the final static scheme of the bridge is created. It can be used for the comparative analyses of various bridges. The value of the coefficient is dependent on the geometry of the cantilever box cross-section only.

THE EFFECTS OF DEAD LOADS IN CANTILEVER CONCRETING BRIDGES

Architecture, Civil Engineering, Environment

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

{"article-title":"THE EFFECTS OF DEAD LOADS IN CANTILEVER CONCRETING BRIDGES"}

Cantilever concreting technology is one of the modern methods of constructing concrete long-span bridges. Characteristic feature of those bridges is the...

No	Location	G [m]	ω [‰]	L [m]
1	Grudziądz	1174	0.848	180
2	Płock - projekt	1297	0.937	148.6*
3	Brzeg Dolny	1189	0.859	140
4	Kędzierzyn-Koźle	1796	1.297	140
5	Kraków	1583	1.143	132
6	Łany k. Wrocławia	1187	0.857	120
7	Milówka k. Wisły	1059	0.765	82

THE EFFECTS OF DEAD LOADS IN CANTILEVER CONCRETING BRIDGES

Article Category: research-article

Published Online: May 20, 2019

Page range: 109 - 120

Received: Sep 10, 2018

Accepted: Dec 12, 2018

DOI: https://doi.org/10.21307/acee-2019-010

Keywords
Cantilever bridge, Long-term deflection, Internal force

© 2019 Predrag Czesław MACHELSKI; published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Figure 7.

Figure 8.

Figure 9.

Figure 10.

Figure 11.

Geometric characteristics of cantilever concreting bridges built in Poland

THE EFFECTS OF DEAD LOADS IN CANTILEVER CONCRETING BRIDGES

Article Category: research-article

Published Online: May 20, 2019

Page range: 109 - 120

Received: Sep 10, 2018

Accepted: Dec 12, 2018

DOI: https://doi.org/10.21307/acee-2019-010

KeywordsCantilever bridge, Long-term deflection, Internal force

© 2019 Predrag Czesław MACHELSKI; published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Figure 7.

Figure 8.

Figure 9.

Figure 10.

Figure 11.

Geometric characteristics of cantilever concreting bridges built in Poland

Keywords
Cantilever bridge, Long-term deflection, Internal force