Your Project Technical data of the project Owner: Schouwburg Orpheus, Apeldoorn Architect: Architectuurstudio Herman Hertzberger, Amsterdam Engineering office: Adviesbureau voor Bouwtechniek bv, Velp General contractor: Draisma, Thomassen Dura, Apeldoorn Length: 81,5 m With: 58,0 m Height: 10,0 m (under ground level) Volume: 35000 m3 Mass: 230.000 kN Project description: The Orpheus complex has a theatre, congress rooms and a number of facilities for these functions. A main part of the total complex is an underground parking garage of three underground levels and a deck that will be part of the public ground. The level of floor -3 is 8,5 meter below ground level. The mean level of the groundwater is 4 meter below ground level, so the parking garage has to be build in the ground water. First the wall of the parking garage has to be made from the ground level. The walls consist of a concrete diaphragm wall with a thickness of 62 cm. The bottom side of the wall is 13,7 meter below ground level. The wall will be anchored in the ground with grouted anchors. After the concrete has hardened the ground between the walls will be removed and the ground water will come up in the construction pit. At the total surface of the parking garage vertical grouted anchors will be placed into the ground to anchor the floor level -3. The anchors will be placed in a grid of 3 meters square. This floor consists of an under water poured-in-place concrete with a thickness of 1 meter in which the anchors will be fixed. When this not armoured concrete floor is hardened, the ground water will be pumped out of the construction pit. Than another floor of armoured concrete with a thickness of 0,5 meter will be poured-in-place on top of the floor with a thickness of 1 meter, and also in this floor the anchors will be fixed. At this stage there's an open construction pit of 8,5 meter deep. In this pit has to be made two parkingfloors, with a deck on top of it. These three floors consist of pre-cast columns, beams and floors. This total pre-cast structure will be placed on the floor on level -3 on the bottom of the pit. When the floors are assembled, these floors will form the supports of the walls. The construction of the parking garage will start in week 37 2002. Technical questions to be solved One of the technical questions which is solved with ESAPrima Win is the performance of the armoured concrete floor with a thickness of 1 meter. There are many combinations made of the loads on this floor in the building stage and the final stage. This file handles about the final stage in which the loads out of the floors level -1 and -2 and the deck are active and directed downwards in combination with the upwards-directed pressure of the ground water. The floor is placed on subsoil (spring support) which can only produce pressure. The floor can't pull on the ground. So the downwards-directed loads are supported bye the subsoil (spring support). Because the pressure under the columns will be higher than under the surface between the columns, the sub grade reaction modules is calculated to be higher. Under the nodes where the forces out of the columns are placed, a surface is defined with the higher modules of sub grade reaction. In the total floor plate a grid of 3-meter square is defined in which the grouted anchors will be coupled. These anchors can only deliver a tensile force. It's not possible to attach a support in a node with only a tensile reaction force. To solve this problem an 'infinite' stiff member is placed between the floor and each node with the support. These members are marked with the non-linear function "only tensile force". In this way an "only tensile force node support" is created. The diaphragm wall is coupled with the floor and has also a linear spring support. The result is that becomes clear which part of the floor in the final stage is pressed on the soil underneath, and which part is anchored with the grouted anchors. The soil pressure can be determined, the tensile force in the anchors, the reaction on the diaphragm wall and the 2D stresses in the concrete to determine what armouring is needed. Also the deformations of the floor can be determined. Use of ESA-Prima Win Experience with ESA-Prima Win when realising the project: ESA-Prima Win makes it possible to combine different nonlinear supports into one file. A surface spring support with only pressure, a linear spring support with only pressure, and a self-defined node support with only tensile forces. Modules used: Base Dutch language 2D Frame 2D Grid 3D Frame Document Physical nonlinear conditions (very important) 2D Plate 2D Wall 3D Shell 15 SCIA User Contest Catalog
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