The reliability of coastal structures in Vietnam in relation to the reliability of wave and water level data

The reliability of coastal structures in Vietnam in relation to the reliability of wave and water level data

Le Huy Thang, T.

Verhagen, H.J.
Klatter, H.J.

Rijkswaterstaat

KWP-collection

1995-05-01

In designing marine and coastal structures there always exists a considerable uncertainty, especially regarding the reliability of the data to be used. This is primarily due to the stochastic nature of sea waves - one of the most complex, volatile, pertinacious and uncomprehensible of nature's forces. Indeed, even if using all the available sourees and methods presently available, the confidence level in the determination of the design load still falls far short of what is expected in other branches of civil engineering. In comparison with countries like Holland, U.S.A, Japan, etc. the problem with the uncertainty in designing and constructing marine structures is far more serious in Vietnam, and perhaps in many other countries of developing world. This is a consequence of usually uncertain hydraulic design conditions, the lack of knowledge and experience in design and construction, the pressure in time, constraints in money, and so on. The purpose of this study is to provide solutions to the problems discussed above. This entails working out an appropriate design philosophy and altematives to cope with uncertainties in designing and constructing coastal structures (in Vietnam), and thereby enhance their reliability. Chapter-l gives a brief description of coastal engineering in Vietnam: the typical hydrometeorlogical features of the South China Sea, necessity and potential for constructing coastal engineering works, present design practice and shortcomings. Chapter-2 and chapter-3 deal with hydraulic environmental conditions and hydraulic design parameters (HDP). In chapter-2, emphasis is given to methods of determination of the main HDP and to identification of sourees of uncertainty related to them. In chapter-3, some possibilities and measures for improving the reliability of the main HDP are investigated. Chapter-4 is devoted to the determination of general principles/ philosophies to aid in design of coastal structures in Vietnam, at present and in the coming years. In chapter-5 and chapter-6, sensitivity analysis for sea dikes and breakwaters is performed, aiming at obtaining relevant types of structures and armour units for the situation of coastal engineering in Vietnam. Chapter-7 deals with possibilities to control the hydraulic loading and structure's strength, while in chapter-8, probabilistic design approach and possibility of applying it in Vietnam is considered.

Vietnam
reliability
risk analysis
wave data

TPG1100

http://resolver.tudelft.nl/uuid:66a39d15-c403-47ae-ae92-cd8acf92161b

IHE Delft

IHE MSc thesis HH231

Hydraulic Engineering Reports

report

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