Drivable building structure

A drivable building structure (1) having a first partial building structure (2.1;

• 2.1′;
• 2.1″) and a second partial building structure (2.2;
• 2.2′;
• 2.2″) drivable relative thereto, wherein
• the first partial building structure (2.1;
• 2.1′;
• 2.1″) comprises a first substructure (3.1;
• 3.1′;
• 3.1″) and a first roadway construction (4.1) forming a first drivable surface (5) and the second partial building structure (2.2;
• 2.2′;
• 2.2″) comprises a second substructure (3.2;
• 3.2′;
• 3.2″) and a second roadway construction (4.2) forming a second drivable surface (5),
• an expansion joint (7) is present between the first substructure (3.1;
• 3.1′;
• 3.1″) and the second substructure (3.2;
• 3.2′;
• 3.2″) and
• a bridging structure (9;
• 9′;
• 9″) spanning the expansion joint (7) and having a bracing plate (17;
• 17′;
• 17″) and an expansion body (10) braced thereby, cast in place from casting compound and forming a drivable surface (8) extends between the first roadway construction (4.1) and the second roadway construction (4.2),
• with the following features:
• the casting compound of the expansion body is polymer-based;
• the expansion body (10) has a multi-layered construction generated in several casting processes performed in succession;
• at least two of the layers (31, 32, 33) of the expansion body (10) have compositions differing from one another.