StatiCAD brings the modeling, analysis and connection design of precast reinforced concrete industrial buildings together in a single program: nonprismatic roof beams, parametric precast sections, pinned connections, roof diaphragm, overhead crane loads, façade panels and TBDY 2018 Chapter 8 connection calculations.
For precast industrial buildings
Precast reinforced concrete structures are erected by assembling columns, beams, purlins and panel elements produced in a factory on site. In single-storey, wide-span industrial buildings, roof beams are mostly pinned to columns, truss-type beams whose depth varies along their length are used, and the roof cover may not behave like a rigid slab.
TBDY 2018 Chapter 8 defines the design of connections in these structures, Annex 8B the modeling of the roof plane with equivalent braces, and 4.3.6 different structural system coefficients for the upper and lower parts in buildings with an intermediate floor. In buildings with overhead cranes, crane loads, seismic forces on façade panels per Chapter 6 and foundation sliding are also part of the design.
StatiCAD links these requirements to the general analysis workflow with tools specific to precast buildings: connections are designed with the forces obtained from the analysis, and every calculation creates a record that goes into the calculation report.
The entire workflow of a precast industrial building, from modeling to connection design.
3D model of the Turkish Precast Association sample industrial building: columns, roof beams, gutter beams, purlins and intermediate floor
Precast I parametric section template: parameters and dimensioned preview
Roof diaphragm equivalent braces (TBDY Annex 8B): inputs and calculation result
Different R and D in the upper and lower parts (TBDY 4.3.6): ν, (R̄a)lower and D̄lower values
Precast connection design (TBDY Chapter 8): pinned (dowel) connection, demands from the analysis result of the selected beam
The “Precast Connection Design” page in the calculation report: demand, capacity, ratio and result
Precast calculations are added to the general calculation report:
The precast features were developed and compared on the example building (40×75 m, with an intermediate floor, 200 kN overhead crane) in the book “Analysis and Design of an Example Precast Concrete Industrial Building per TBDY-2018” by the Turkish Precast Association.
The Annex 8B, overhead crane, different R and D, connection, façade panel and foundation sliding calculations were compared with the numerical examples in the book; the results match exactly except where the program applies the code on the safe side. When the same finite element model was built independently in SAP2000 v27, the periods came out within 1%.
The beam is defined as a single member with a section varying along its length: the start and end sections, segment lengths and the form of stiffness variation (linear, parabolic, cubic) are entered. A double-pitched gable roof beam is defined with two segments. The analysis, SAP2000 transfer and reinforcement calculation use the nonprismatic section automatically.
The default assumption is a rigid diaphragm. For roofs with trapezoidal sheeting or sandwich panel cover, the shear stiffness of the roof plane can be modeled with equivalent brace pairs per TBDY Annex 8B. In this case, it is recommended that you also run the rigid diaphragm solution for comparison.
The wheel reactions from the manufacturer’s table, wheel spacing, dynamic factor, crane girder span and corbel elevation are entered; the rail columns are selected in the plan. The program calculates the crane girder design forces, writes the crane loads to the columns as separate load cases, generates the crane combinations and adds the bridge mass as additional seismic mass.
No. After the analysis, select a single beam and use the “Take from selected beam” button to transfer the forces at the relevant end of the beam to the connection window. Each calculation creates a connection record and goes into the report.
The precast tools are included in StatiCAD Ultimate; the nonprismatic section definition is available in all editions. The precast data of a project prepared in Ultimate is preserved in the file.
Download the demo version and try the precast industrial building workflow for free, or let us determine the edition that suits your needs together.