Design and evaluation of connections

Figure 82. Design of Platen base connection (IdeaStatica)

Once the corresponding geometry and elements are properly design, it’s necessary to input the loads. For this case, it will be used the reactions on supports that were presented during the structural design on SAP2000. In the following figure, it’s shown the load case that is presented for the case.

Figure 83. Load case Platen base connection (IdeaStatica)

Once the geometry and also the loads are properly introduced on the model, it’s necessary to identify the code and calculation settings that are part of the model in Idea Statica. These settings that will be presented next, are going to be used for all connections that will be designed during the evaluation of the case study.

Figure 84. Code and calculation settings (IdeaStatica)

Now, it can be analyzed the connection that it’s been designed.

Figure 85. Check of platen base connection (IdeaStatica)

As it can be seen, the connection has been checked for the several considerations that were presented. Additionally, Idea Statica allows to identify the equivalent stresses, that for the case, corresponds to the equivalent stresses of the foundation and also the section HEB200.

Figure 86. Equivalent stresses of foundation in platen base connection (IdeaStatica)

Figure 87. Equivalent stresses of element HEB200 in platen base connection (IdeaStatica)

Finally, Idea Statica present a project report for each element that has been designed and properly checked. This report for the platen base connection is presented next.

Figure 88. Project report for platen base connection (IdeaStatica)

• Main beams connection:

The main beams connection, allows to join the IPE 180 beams which are considered principal ones. As it was explained, the slab is designed so that the load is distributed over the main beams’ direction. In the following figure it’s shown the design that was achieved in Idea Statica software.

Figure 89. Design of main beams connection (IdeaStatica)

Once the corresponding geometry and elements are properly design, it’s necessary to input the loads. For this case, it will be used the maximum values of bending moments and shear forces presented during the structural design on SAP2000. This chose of maximum values, allows to design only one type of connection, corresponding to the critical case. In the following figure, it’s shown the load case that is presented for the case.

Figure 90. Load case for main beams connection (IdeaStatica)

With the geometry and also the loads properly introduced on the model, and using the code and calculation settings, it’s possible to run the model.

Figure 91. Check of platen base connection (IdeaStatica)

As it can be seen, the connection has been checked for the several considerations that were presented. Additionally, it will be shown the equivalent stresses and the deformed mesh of the main beam connection from Idea Statica.

Figure 92. Equivalent stresses of main beam connection (IdeaStatica)

Figure 93. Deformed mesh of main beam connection (IdeaStatica)

Finally, Idea Statica presents a project report for each element that has been designed and properly checked. This report for the main beam connection is presented next.

Figure 94. Project report for main beam connection (IdeaStatica)

• Main and secondary beams connection:

The main and secondary beams connection, serve to join the secondary beams (IPE100) with the principal beams (IPE180). This connection will allow to transmit all loads from the slab of the pedestrian bridge to the principal beams, that as it was explained, are the ones who carry all loads. In the following figure, it’s the shown the design reached in Idea Statica.

Figure 95. Design of main and secondary beams connection (IdeaStatica)

With the geometry and elements properly designed, it’s necessary to input the loads. For this case, it will be used the loads presented on the sections that are connected the main and secondary beams, these values are found in the structural design on SAP2000. In the following figure, it’s shown the load case that is presented for the case.

Figure 96. Load case for main and secondary beams connection (IdeaStatica)

Once the geometry and also the loads are properly set on the model, and using the code and calculation settings, it’s possible to run the model. In the following figures, it will be shown the equivalent stresses and the project report for the checked connection that has been reach in Idea Statica.

Figure 97. Project report for main and secondary beam connection (IdeaStatica)

• Gantry (HEB200-IPE180) connection:

This connection allows to join the HEB 200 section that has been used to transfer loads to the foundation, and the principal beams (IPE 180). In the following figure, it’s the shown the design reached in Idea Statica.

Figure 98. Design of Gantry (HEB200-IPE180) connection (IdeaStatica)

With the geometry and elements properly designed, it’s necessary to input the loads. For this case, it will be used the loads presented on the supports points, these values are found in the structural design on SAP2000. In the following figure, it’s shown the load case that is presented for the case.

Figure 99. Load case of Gantry (HEB200-IPE180) connection (IdeaStatica)

Once the geometry and also the loads are properly set on the model, and using the code and calculation settings, it’s possible to run the model. In the following figure. It will be shown the check of the connection in Idea Statica

Figure 100. Check of Gantry (HEB200-IPE180) connection (IdeaStatica)

As it can be seen, the connection has been checked for the several considerations that were presented. Additionally, it will be shown the equivalent stresses and the deformed mesh of the correspondent connection in Idea Statica.

Figure 101. Equivalent stresses of Gantry (HEB200-IPE180) connection (IdeaStatica)

Figure 102. Deformed mesh of Gantry (HEB200-IPE180) connection (IdeaStatica)

Finally, it will be presented the project report for each element that has been designed and properly checked. This report is shown next.

Figure 103. Project report of Gantry (HEB200-IPE180) connection (IdeaStatica)

• Gantry (HEB200-IPE100) connection:

This connection corresponds to the one that will join the HEB200 section to last secondary beam (IPE100). As it was mentioned before, the design has been contemplated so that the slab transmits the loads in the direction of the main beams. Then, the secondary beam that is considered for the present connection, will not transmit any loads other than its own weight to the HEB 200 section. There is not necessity of evaluating any loads for the connection. However, the design has been performed on Idea Statica with the loads of the IPE 100 beam. In the following figures, it will be shown the design reached and the respective checked and project report by Idea Statica.

Figure 104. Design of Gantry (HEB200-IPE100) connection (IdeaStatica)

Figure 105. Check of Gantry (HEB200-IPE100) connection (IdeaStatica)

Figure 106. Project report of Gantry (HEB200-IPE100) connection (IdeaStatica)