**Author details**

bridge VR/4D tools developed can be considered as improvements when compared with traditional ways of presenting the bridge construction issues in support of the construction

The main objective of this practical application of the model is to support the understanding of the construction process and to assist training professionals. This chapter shows that the applications with these characteristics make the advantage of using techniques of virtual reality more self‐evident, especially when compared to the simple manipulation of complex

The parametric cross sections of the box girder deck and algorithms to obtain the (x, z)

The geometric parameters set is {*Be, be, h, ve1, ve2, ve3, ve4, ve5, he1, he2, he3, he4*}. The coordi‐ nates *x* and *z* of each vertices of the box girder cross section are obtained using the following

models, which cannot be broken down, in it a useful contribution to the field.

x(1) = 0 z(1) = 0 x(2) = ‐Be z(2) = 0

x(7) = ‐be ‐ he4 z(7) = h ‐ ve5 x(8) = ‐be z(8) = h x(9) = 0 z(9) = h x(10) = 0 z(10) = esup x(11) = x(10) ‐ hi1 z(11) = z(10) + vi1 x(12) = x(11) ‐ hi2 z(12) = z(11) + vi2 x(13) = x(12) ‐ hi3 z(13) = z(12) + vi3 x(14) = x(13) ‐ hi4 z(14) = z(13) + vi4 x(18) = 0 z(18) = h ‐ einf x(17) = x(18) ‐ hi7 z(17) = z(18) x(16) = x(17) ‐ hi6 z(16) = z(17) ‐ vi6 x(15) = x(16) ‐ hi5 z(15) = z(16) ‐ vi5

x(3) = ‐Be z(3) = ve1 x(4) = x(3) + he1 z(4) = z(3) + ve2 x(5) = x(4) + he2 z(5) = z(4) + ve3 x(6) = x(5) + he3 z(6) = z(5) + ve4

activity and of training in these processes.

**Annex**

72 Structural Bridge Engineering

algorithms.

coordinates of each vertices.

Alcínia Z. Sampaio

Address all correspondence to: zita@civil.ist.utl.pt

Department of Civil Engineering, University of Lisbon, Lisbon, Portugal
