Terms and Definitions
- Seda Ozdemir (Unlicensed)
This section provides definitions for key terms used throughout this document.
Analytical line (wall, beam, slab):
An analytical line refers to a representation of the finite element (FE) model for beams, walls, and slabs. In the AEC|BOLT AUTOCAD App, it is referred to as "analytical beams" for beams, "analytical walls" for walls, and "analytical slab" for slabs. The default prefix abbreviations "AB-" and "AW-" are used along with the corresponding member number, such as AB-1, AW-3, and so on.
From a mathematical perspective, an analytical line is formed by connecting two points with a line. In the AEC|BOLT AUTOCAD App, drawing a line between two designated points creates an analytical line. If there is a break or disruption along the straight line between the two points, breakpoints should be added at the locations of the discontinuity. Discontinuities can occur for various reasons, including:
Change of cross-section: When there is a change in the cross-sectional properties of the member along the line, such as a transition from one shape or size to another.
Interference with another member: If the analytical line intersects or interferes with another member in the model, a breakpoint should be added to indicate the intersection point.
Offset on plan/elevation view: When there is a deliberate shift or offset in the position of the analytical line in the plan or elevation view, breakpoints should be placed at the offset stations to accurately represent the geometry.
By incorporating breakpoints at the appropriate locations, the analytical line can capture and represent these discontinuities in the structural model.
Figure 1a depicts the formwork plan for a collection of shear walls and beams. By overlaying the architectural/structural drawing in the AEC|BOLT AUTOCAD App, the corresponding drawing is generated. The information extracted from drawing in Figure 1a is then transformed into:
3D model: The AEC|BOLT AUTOCAD App utilizes the drawing information to generate a three-dimensional (3D) model of the structure. This model provides a comprehensive representation of the building, including the shear walls and beams, in a virtual 3D environment.
Geometry for the construction documents: The drawn elements in Figure 1a, such as the shear walls and beams, are translated into precise geometric data that can be used in the preparation of construction documents. This includes generating accurate measurements, dimensions, and other relevant geometric information required for construction and documentation purposes.
By converting the formwork plan into a 3D model and extracting the necessary geometry for construction documents, the AEC|BOLT AUTOCAD App enables a seamless transition from the initial drawing to a comprehensive digital representation and documentation of the structure.
Breakpoint:
A breakpoint refers to a specific point along a straight analytical line where a discontinuity occurs. In the context of the AEC|BOLT AUTOCAD App, breakpoints are defined to handle situations where there is a change or disruption along an analytical line.
In Figure 1b, the analytical line definitions of the walls are depicted for the given layout. One particular analytical line, named AW 12, represents the wall between beams B1 and B3. Along this analytical line, there is a change in cross-section, resulting in a variation in thickness.
To accommodate this change in thickness, two breakpoints are introduced along the AW 12 analytical line. These breakpoints mark the locations where the discontinuity in thickness occurs. By identifying and incorporating these breakpoints, the AEC|BOLT AUTOCAD App can accurately represent the variations in the wall's geometry and properties.
The inclusion of breakpoints allows for precise modeling and analysis of structures, ensuring that changes in cross-section, interfering members, or offsets are accurately accounted for in the analytical line representation.
Figure 1c illustrates the relationship between the analytical walls and the analytical beams in the structural model. This view provides valuable information that serves as the basis for further analysis and verification.
The data obtained from drawing Figure 1c is transformed into two key aspects:
Mathematical Model for Finite Element Analysis: The relationships, connections, and interactions between the analytical walls and beams are translated into a mathematical model. This model incorporates the structural properties, boundary conditions, and loads applied to the system. It serves as the foundation for conducting finite element analysis, which allows for comprehensive structural evaluations and assessments.
Verification of Structural Members: The pieces of structural members represented by the analytical walls and beams are subject to code checks and design verifications. The information obtained from Figure 1c is utilized to assess the structural members' compliance with relevant building codes and design criteria. This verification process ensures that the structural elements can safely withstand the anticipated loads and meet the required standards.
By leveraging the insights gained from Figure 1c, the AEC|BOLT AUTOCAD App facilitates the creation of an accurate mathematical model and enables the verification of structural members, ultimately contributing to the overall reliability and safety of the designed structure.