This tutorial highlights the major features of PGSplice. At times, we deviate from what might be considered "normal practice" to illustrate certain features. Please consider this tutorial a lesson on using PGSplice and not a lesson in spliced girder analysis.

In this tutorial you will:

The Bridge

One of the basic assumptions inherent in PGSplice is that you are analyzing a real bridge and not just a girder. It is assumed that you have either preliminary plans or a final set of PS&E sitting in front of you. The input for PGSplice reflects the information you will find on a typical set of bridge plans.

The example bridge for this tutorial is the Twisp River Bridge in SR 20 in Twisp, WA. This is a single span spliced girder bridge with a 60 m span. The details are given below:

Item	Description
Alignment	Initial Direction N 3 56 30 E Curve 1: PI 1+087.802, Delta 5 30 01 L, Radius 750 m Curve 2: PI 1+221.606 Delta 2 03 36 L, Radius 1335 m
Profile	Station : 1+100.62 Elevation : 491.093 Slope : -1.4336%
Crown Slope	Left : -0.02 ft/ft Right : -0.02 ft/ft
Pier 1	Back of Pavement Seat : 1+130
Erection Tower 1	1+144.25
Erection Tower 2	1+175.75
Pier 2	Back of Pavement Seat : 1+190
Girders	6 - WF95PTG @ 2.100 m, Three segments each
Slab	Gross Depth : 190 mm Overhang : 1.620 m (6.87 m from CL Bridge to edge of deck) Slab Offset (aka Haunch or "A" Dimension) : 230 mm Wearing Surface (Sacrificial Depth) : 13 mm
Materials	Precast Segments: f'ci = 34.5 MPa, f'c = 55.2 MPa Closure Joints: f'ci = 24.25 MPa, f'c = 34.47 MPa Deck: f'c = 34.47 MPa Strands : 15.24 mm Grade 270 Low Relaxation

The centerline of the bridge is 1.200 m left of the alignment.

Prestressing

Duct	Diameter (mm)	E1 (mm)	E2 (mm)	# Strands	Pjack (kN)
1	115	375	375	19	3910
2	115	1125	510	19	3910
3	115	1875	645	19	3910

Duct Layout