Abstract
Assessment of tunnel support performance under seismic conditions in the Sydney region has continued to develop and improve. The ground motion characteristics of design earthquakes are used to estimate tunnel deformation with closed form elastic solutions and numerical analysis. This paper describes the selection of the design earthquakes, ground motion characteristics and the applied methodology.
This paper also proposes a new approach based on Austroads' Guide to Road Tunnels. The new approach comprises a three-level design criterion. Each level assesses the tunnel response against a different return period earthquake. The first level assesses the tunnel for continuous operation with only minor damage allowed and no disruption to traffic. The second level targets tunnel operation for emergency traffic only, with some damage needing repair allowed. The third level is targeted at life safety and prevention of tunnel collapse.
This paper also proposes a new approach based on Austroads' Guide to Road Tunnels. The new approach comprises a three-level design criterion. Each level assesses the tunnel response against a different return period earthquake. The first level assesses the tunnel for continuous operation with only minor damage allowed and no disruption to traffic. The second level targets tunnel operation for emergency traffic only, with some damage needing repair allowed. The third level is targeted at life safety and prevention of tunnel collapse.
Original language | English |
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Title of host publication | 16th Australasian Tunnelling Conference 2017: Challenging Underground Space : Bigger, Better, More |
Place of Publication | Australia |
Publisher | Engineers Australia |
Number of pages | 7 |
ISBN (Print) | 9781922107985 |
Publication status | Published - 23 Nov 2017 |
Externally published | Yes |
Event | 16th Australasian Tunnelling Conference 2017 - Star City Sydney, Sydney, Australia Duration: 30 Oct 2017 → 1 Nov 2017 Conference number: 16 |
Conference
Conference | 16th Australasian Tunnelling Conference 2017 |
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Abbreviated title | ATS2017 |
Country/Territory | Australia |
City | Sydney |
Period | 30/10/17 → 1/11/17 |