G. Dmochowski

Analysis of failure conditions for a dynamically loaded composite floor system of an industrial building

Abstract Results of examination and analysis of cracks formation in a composite slab floor in an industrial warehouse hall is presented in the paper. During exploitation of the floor, on which lift trucks and presses worked, a lot of deep cracks occurred in the slab. In order to define characteristics of cracks and properties of concrete there were made different NDT examinations. Measurements of vibrations due to work of presses were also realized with aim to evaluate their possible influence on cracks formation. Static, dynamic and strength structural calculations were also made based on the model of continuous, multi-bay plate. They showed that applied slab reinforcement was sufficient and acting loads did not have to cause cracks. After 3D modelling of the building and taking into consideration the flexibility of main steel beams it was gained that in the RC floor slab over supports bending moments could occur nearly three times greater than calculated from the 2D model. Taking into consideration wron...

Structural Restoration and Adaptation to Modern Architecture of the Baroque Oppersdorf Palace, Wrocław, Poland

This paper is an overview of structural interventions which should be made to the Baroque Oppersdorf Palace during its renovation. All main technical problems were analyzed and proper constructional solutions were presented. Several characteristic types of destruction were detected, caused by natural deterioration and also by mechanical influences (war destruction, lack of conservation etc.). The main building structure has survived from the Baroque period, except for the wooden roof. Some of the cellar vaults and some of them over the first floor were also not destroyed. However, some main reconstruction work was done, probably in the last few years of the 19th century. For example, a break with a new staircase and some masonry vaults over the cellar were changed to ones of Klein type on steel beams. The main aim of the reconstruction was to strengthen the historical structure of the building and adapt it to the modern architecture and to reorganize the buildings inner space, but keeping the external proportions, architectural details and ornaments unchanged.

Revitalization of Historical Building in Wrocław’s City Centre, Poland

Some aspects of the revitalization of the 14th century historical building are presented in the paper. The building was originally used as a poorhouse and a hospital for children. The original Gothic masonry building on the site was a two-storey building with a cellar, situated in a corner of two streets. In the middle of the 19th century the building was converted into a school and then the first large-scale demolition of the hospital’s Gothic walls took place. After the 2nd World War a school was also situated in the building, where it existed until the late nineties. The aim of the renovation process was to convert it into an exclusive office block. The design works were preceded by historical research and on-site investigations. Complex conversion of the object consisted in the reconstruction of the old building structure, creating the inner courtyard and covering it with a glass roof. In the existing part of the basement one of the longest single-nave vaults in Poland and the exquisite roof truss system with a lying bidding-rafter post deserved special attention during the renovation.