Contributions of Flexible-Arch Configurations in Shimenzi Arch Dam : New Evidence from Field Measurements

This paper presents a retrospective investigation into the performance of a new type of flexible-arch configurations in Shimenzi arch dam based on the past ten-year-long field measurements. The flexible-arch configurations are mainly comprised of artificial short joints at the middle downstream surf...

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Bibliographic Details
Published in:Mathematical problems in engineering 2014-01, Vol.2014 (2014), p.1-9
Main Authors: Zhong, Jianwen, Wang, Enzhi, Zhou, Yuan-de, Li, Qingbin, Li, Penghui
Format: Article
Language:English
Subjects:
Arch dams
Arches
Artificial joints
Configuration management
Construction
Crack propagation
Dams
Design
Laboratories
Mathematical models
Mathematical problems
Measuring instruments
Monitoring
Seismic engineering
Strain gauges
Stress concentration
Stress relaxation
Surgical implants
Tensile stress
Working conditions
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Summary:This paper presents a retrospective investigation into the performance of a new type of flexible-arch configurations in Shimenzi arch dam based on the past ten-year-long field measurements. The flexible-arch configurations are mainly comprised of artificial short joints at the middle downstream surface and a middle contraction joint with hinged well and enlarged arch ends with bending joints. Fundamental design considerations of these components are provided, and their contributions to the performance of Shimenzi arch dam are discussed in detail using the monitoring data from joint meters, strain gauges, and thermometers. Some elementary numerical studies have been conducted on a typical arch structure with different arrangements of artificial joints. Both the field data and numerical results prove well the effectiveness of the purposely built short joints and the middle contraction joint on the relaxation of tensile stress mobilization. Field survey data also clearly demonstrate the significance of the hinged well at the upstream side of the middle joint for a continuous arch force transfer.
ISSN:1024-123X
1563-5147
DOI:10.1155/2014/467369