BridgeEng06-Loads.pdf

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Microsoft PowerPoint - BridgeEng06-Loads

BRIDGES

Bridge Loads

Bridge Loads

Marek Salamak

Tibet, China

Silesian University of Technology

Department of Roads and Bridges

06

06 Ï BRIDGES

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Department of Roads and Bridges

Today Agenda

£

Bridge loads classification

£

Permanent loads

£

Live loads

¡

Vehicular, railway, pedestrian

¡

Dynamic factor

£

Load distribution

£

Resonant phenomena

£

Other loads

¡

Wind, temperature, impact etc.

Marek Salamak 2/23

¡

Dynamic factor

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Department of Roads and Bridges

Introduction

£

Bridge loads will be discussed on the basis of PN-85/S-10030 code

£

Type of bridge loads

¡

Permanent loads

¡

Live loads

£ Vehicular

£ Vehicular

£ Railway

£ Pedestrian

¡

Effects due to temperature deformations

¡

Wind loads

¡

Other loads

£

Loads classification

¡

Basic, additional and exceptional

Marek Salamak 3/23

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Department of Roads and Bridges

Permanents (Dead) Loads

£

The structure and formwork which becomes part of a structure

£

Hydro isolation

£

Wearing surface and/or potential deck overlays

£

Concrete and steel barriers

£

Other elements deemed permanent loads by the designer and owner

£

Earth pressure, earth surcharge, and down drag

Marek Salamak 4/23

£

Other elements deemed permanent loads by the designer and owner

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Department of Roads and Bridges

Unit Weight for Dead Loads and Load Factors

£

Loads

¡

Steel

78,5 kN/m 3

¡

Reinforced concrete

27,0 kN/m 3

(concrete with basalt aggregate)

¡

Hydro isolation

14,0 kN/m 3

¡

Asphalt

23,0 kN/m 3

¡

Rubble

20,0 kN/m 3

¡

Concrete sleepers for track 5,1 kN/m

¡

Rails S60 for track

1,2 kN/m

£

Factors

¡

Structural elements

1,2 [relieving 0,9]

¡

Nonstructural elements 1,5 [relieving 0,9]

The Sydney Harbour Bridge

Marek Salamak 5/23

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