DESIGN AND CONSTRUCTION OF A SHOPPING CENTRE
The structure of DELTA CITY shopping mall in Belgrade consists of two separated structures: the structure of the mall and the structure of the multi-story open garage. The overall dimensions of the irregular layout of the structure are 210 m
110 m, with four main levels in the mall and five parking levels in the garage. Because of the different exposure conditions, the structure of the garage is separated from
the mall’s structure with an expansion joint at all the levels, except at the level of the foundation slab.The mall’s structure is designed
without any expansion joints, except for temporary joints during the construction stage. It consists mainly of reinforced concrete cantilevered columns cast in place, at typical spans of 8.2 m 8.2 m, precast reinforced concrete simple beams and precast prestressed hollow core slabs. The reinforced concrete frames cast in place are designed at the facades and at few locations in the interior, to provide additional seismic resistance. The main structure of the open multi-story garage consists of reinforced concrete frames and precast hollow core slabs and it is designed for exposure class XD3, with special
attention paying to durability conditions. Due to mainly precast structure, especially hollow core slabs as a floor solution, the complete concrete structure of approximately 80,000 m2
is constructed for less then 12 months.
1 INTRODUCTION DELTA CITY shopping mall is the first shopping mall built in Belgrade, in 2007. The Investors
were compa-nies Delta Md.o.o.and Delta Cityd.o.of rom Belgrade, general designer was Slavija Biro d.o.o. from Belgrade in cooperation with Moore Architects from Israel and the general contractor was company Poor from Austria. The whole building is functionally devided into two separated blocks: shopping mall and multi-story open garage. The overall dimensions of the irregular lay-out of the structure are 210 m
110 m, with four main levels in the mall (storey height of 5.80 m) and five parking levels in the garage (storey height of 2.90 m).
Because of the differentexposureconditions,the structure of the garage is separated from the mall’s structure with an expansion joint at all the levels, except at the level of the foundation slab. Besides in the multi-story open garage, parking places are provided in the common underground level, also. The other levels of the shopping mall are provided for the shops, fast food restaurants, bowling facilities, cinemas etc.
2 THE SHOPPING MALL STRUCTURE
The structure was analyzed and designed in two steps: analysis and design of individual precast structural elements, and analysis and design of spatial framed
structure.The following loads for the completed struc- ture were considered: gravity loads, lateral loads: seismic (ground acceleration equal to 115 cm/sec
and wind loads. As the building is air-conditioned in the service, the structure was designed without any expansion joints, except for temporary joints during
the construction stage. Because of 210 m of the over all length, it was decided to design the structure for accidental temperature change equal to