ADVANCED SUSPENSION BRIDGE TECHNOLOGY & THE FEASIBILITY OF THE SUNDA STRAIT BRIDGE
09 Januari 2013
The development of long span suspension bridges world wide is first reviewed to identify what the limit of span lengths would be for crossing the Sunda Strait. Its scientific background shows that this development can be divided into three successive generations, the third of which being the latest and most advanced one, capable of achieving ultra-long spans. Therefore, the technology of the third generation should undoubtedly be applied for crossing the deep and wide sea valleys of the Sunda Strait. Based on unit costs derived from recent suspension bridge projects, the construction cost of the Sunda Strait Bridge is then assessed and based on the anticipated traffic volume crossing the strait and its growth in the future, the financial viability of the project is finally shown.
1. The evolution of suspension bridge technology, reflected by the increasing spanlengths, is manifested in three successive generations, the third of which involving the latest advanced technology, capable of achieving ultra-long spans. The Third Generation suspension bridges, applying a multi-box deck concept, are characterized by their cost effectiveness due to their light self-weight, extremely low flutter sensitivity associated with very high critical wind speeds and good seismic performance. It is therefore important that this. Third Generation suspension bridge technology be adopted for crossing the wide and deep sea valleys of the Sunda Strait.
2. The construction of the Sunda Strait Bridge is expected to cost some USD 7 billion (Rp.16.8 trillion) and requires some 13 years to complete. With the anticipated traffic volume crossing the strait and its development in the future, a toll fee of 1.5 to 2.5 times the present ferry fare is sufficient to reach a Financial Internal Rate of Return (FIRR) of more than 10% exceeding the bank interest rate for long-term loans, which confirms the financial feasibility of the project.
3. The economic benefit of constructing the Sunda Strait Bridge will be felt nation wide as a result of better crossing facilities between Jawa and Sumatera, facilitating rapid regional development on both sides of the strait, particularly in the tourism, industrial and natural.
Prof.DR.Ir. Wiratman Wangsadinata
President Director of PT. Wiratman & Associates
Professor, Bandung Institute of Technology