The Malakow Tower Prosper 2 in Bottrop is an old head frame of the coalmine Prosper Haniel. It is the only existing Malakow Tower of the Ruhrgebiet with a head frame of steel inside the masonry. This tower was founded in 1871 and has been used until 1987. To compensate damages and to make the winding shaft deeper the tower permanently had to be fitted to new and higher stresses. Because of these reconstruction works the static of the tower changed completely.In more than one hundred years of use the tower got a lot of damages. Since closing the dilapidation rose, because the repairs have been stopped. To save this important monument the DBM investigated basics for the rehabilitation of this building. In this complex task components of static equilibrium, architecture, preservation of historic buildings civil engineering and interests of the care of monuments have been considered. In co-operation with the Historische Gesellschaft Bottrop the DBM planned measures for the rehabilitation of this tower as a multidisciplinary project. The worst damages are cracked foundations, breaks in the wall and that the tower is extremely leaning to one side. A new use had been found, which considers the reduced stability and has a relationship to the history of this building. Through the years the tower became a symbol of the town of Bottrop, so the rehabilitation concept of the Malakow Tower plans to open the building to the public as an art and culture classroom. The article describes measures for the stabilisation and rehabilitation of this tower.

The objective pictorial representation and description of the actually found state of buildings forms the basis for all subsequent investigations and works for maintaining and restoring historical buildings. Simultaneously, there is urgent demand for information systems which can supply global information on the object and especially on the effects of the processing steps to all participating institutions. The first step has to be the exact geometrical representation of the object. Here, different methods centred around the application of digital image processing techniques will be presented. The consideration of historical sources and their conversion into data bank structures in connection with geometric quantities permit the definition of information systems. Additionally, interfaces must be set up to integrate current results into the data stores. On the basis of reasonably defined data bank structures, simulation calculations can be performed. In this area, first results from current research projects in the field of the maintenance of buildings will be presented.

New traffic lines and large private and federal building complexes are under construction in the city of Berlin. This paper gives informations about geological, geotechnical and environmental aspects of the ongoing engineering works.

Earthquake Engineering & Structural DynamicsVolume 13, Issue 1 p. 129-131 Short Communication Discussion on a paper by L. A. Ortiz, R. F. Scott and J. Lee S. Savidis, S. Savidis Technical University Berlin, Germany Professor.Search for more papers by this authorH. Klapperich, H. Klapperich Technical University Berlin, Germany Research Assistant.Search for more papers by this authorW. Sarfeld, W. Sarfeld Technical University Berlin, Germany Professor.Search for more papers by this author S. Savidis, S. Savidis Technical University Berlin, Germany Professor.Search for more papers by this authorH. Klapperich, H. Klapperich Technical University Berlin, Germany Research Assistant.Search for more papers by this authorW. Sarfeld, W. Sarfeld Technical University Berlin, Germany Professor.Search for more papers by this author First published: January/February 1985 https://doi.org/10.1002/eqe.4290130112Citations: 1 AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Citing Literature Volume13, Issue1January/February 1985Pages 129-131 RelatedInformation

A model is presented for the calculation of high speed rail vehicles in which coupling of the ties bedded on the surface of a homogeneous elastic isotropic half space is taken into account. The three dimensional mixed boundary conditions in the region of the rigid ties are satisfied exactly. Numerical results are presented for rectangular concrete ties illustrated by amplitude curves, whereby the side length ratio and the number of the ties are varied. The results demonstrate the influence of coupling on vertical vibrations. Compliance functions for vertical coupling are presented which allow derivation of suitable frequency independent spring and damping coefficients. These compliance functions can be used for calculating the total system tie-rail-vehicle finite element. It is finally shown how these compliance functions can be easily calculated approximately.

Wastes of uraniurn mining in the former East Germany were disposed in old openpit mines and valeys, which are bordered with rockfill dams. The soil material in these tailings h ave grain sizes from clay to middle sand. Resulting from partially high water contents the soil material have thixotropical conditions. Lang-term protection of these tailings required a dam-stability design due to seismic loading. The ground is formed by metamorphie clay shales or middle-strong sand- and claystones. An analysis of regional seismicity showed value for the seismic site intensity from 7 to 8 degrees at MSK-scale. The computation of the dynamic stresses and strains in the dams were performed in the time-domain by finite-element analyses by the method of Seed. Dynamic soil properties were determined by resonant column and cyclic triaxial tests in connection with in situ borehole tests. For the dam stability analysis the classic theory of failure circle surfaces was used whereby the material softening due to dynamic loading was taken into account.

Wastes of uranium mining in the former East Germany were disposed in old openpit mines and valleys,which are bordered with rockfill dams. The soil material in these tailings have grain sizes from clay to middle sand. Resulting from partially high water contents the soil material have thixotropical conditions. Long-term protection of these tailings required a dam-stability design due to seismic loading. The ground is formed by metamorphic clay shales or middle-strong sand- and claystones. An analysis of regional seismicity showed value for the seismic site intensity from 7 to 8 degrees at MSK-scale. The computation of the dynamic stresses and strains in the dams were performed in the time-domain by finite-element analyses by the method of Seed. Dynamic soil properties were determined by resonant column and cyclic triaxial tests in connection with in situ borehole tests. For the dam stability analysis the classic theory of failure circle surfaces was used whereby the material softening due to dynamic loading was taken into account.