Preview

Author(s):	Putke, Thomas; Bohun, Roksana; Mark, Peter
Title:	Experimental analyses of an optimized shear load transfer in the circumferential joints of concrete segmental linings
Abstract:	The coupling of subsequent rings in the circumferential joints of tunnel lining systems is of particular interest in mechanized tunnelling and a controversial issue in discussions. On the one hand, interlocking systems such as “cam & pot” can be of use in limiting the lining's deformation. But on the other hand, unfavourable conditions often lead to repetitive and significant damage that decreases the tunnel's lifetime. This paper describes the experimental results of a three-part optimization concept (structural analysis, topological optimization and experimental verification) that was tested for concrete linings using the example of the shear coupling mechanism. First, geometrical dependencies are analysed which reveal predominantly stronger cams than corresponding pots. Hence, pot bearing capacities are increased, transferring topological optimization results to reinforcement concepts featuring micro-mesh reinforcement, steel fibre cocktails and rebars welded to anchor plates. The latter especially resulted in comparatively stronger pots along with considerably better ductility. Nevertheless, pots still represent the weaker part and are crucial for the design. Therefore, a concept with steel dowels and predefined static boundary conditions was tested. The results are characterized by a significantly lower scatter of bearing capacities accompanied by much better ductility.
Source:	Structural Concrete 16 (2015), No. 4
Page/s:	572-582
Language of Publication:	English

I would like to buy the article

You can download this article for 25 € as a PDF file (1.39 MB).
The PDF file can be read, printed and saved.
Duplication and forwarding to third parties is not allowed.

To enquire about the cost of the contribution and to order the PDF, please send us an e-mail to marketing@ernst-und-sohn.de. You can also use the following button.

make a request

I am an online subscriber

As an online subscriber of the journal "Structural Concrete" you can access this article via Wiley Online Library.

I would like to order "Structural Concrete"

This article has been published in the journal "Structural Concrete". If you would like to learn more about the journal, you can order a free sample copy or find out more information on our website.

Prices include VAT and postage. Prices for 2017/2018.
€ Prices apply to Germany only. Subject to alterations, errors excepted.