Submerged floating tunnel sft is an innovative structure system to realize the traffic between both sides of the strait. The equation of motion of the cable is obtained by a mathematical method utilizing the euler beam theory and the galerkin method. The submerged floating tunnel moored by tethers is simplified as a simply supported eulerbernoulli beam, and its vibration caused by vehicles passing through the tubular is also reduced as parametric excitation, moreover, the vibration. Submerged floating tunnel sft is an even more extreme form of this art, as the full weight of tunnel or most of it is balanced by buoyancy. Anchor cables, sft, and submarine were modeled by the finite element method fem. Water was modeled by smoothedparticle hydrodynamics sph. According to the typical crosssection of the structure, the twodimensional plane coupled. Conceptual study of submarine pipeline using submerged floating tunnel ery budiman, endah wahyuni, raka igp, and budi suswanto department of civil engineering, institut teknologi sepuluh nopember, surabaya, indonesia email. Underwater explosion is the most critical event to long submerged structures. In particular chapter 1 gives a general overview of the modern solutions and technologies available in the field of waterway crossings, introducing briefly the revolutionary concept of submerged floating tunnel. This paper presents the theoretical investigation on the damage of the submerged floating tunnel sft under extreme loads.
The submerged floating tunnel sft concept was first conceived at the beginning of the century, but no actual project was undertaken until recently. Submerged floating tunnel sft is a new structural solution for waterway crossings compared to the classical solutions such as cable supported bridge, immersed tunnel or underground tunnel. It follows the development of sft through ita working group 11 immersed and floating tunnels that has resulted in proposed designs for tunnels in europe and where sft might be used worldwide. Dynamic response analysis of cable of submerged floating. Submerged floating tunnel wikipedia republished wiki 2.
Response analysis of submerged floating tunnel hit by. The main structure is kept at a certain depth underwater and is placed in position by anchormooring cables. In this paper, first, shock waves and impulse pressures generated by an explosive away from the sft are expressed by the formulas coming from the experimental results. A simplified analysis model of cable for submerged floating tunnel subjected to simultaneous hydrodynamic force and earthquakeexcited vibrations in an ocean environment is proposed in this study.
Submerged floating tunnel sft is a new type of transportation infrastructure for crossing sea straits in relatively deeper water. It is very different from other structures like bridges and tunnels, it is the new invention in which the conventional structure in crossing long, large and deep. Submerged floating tunnels sft were researched by countries had many island as norway, italy, china, and japan. Vibration response of cable for submerged floating tunnel. Pdf performance evaluation of submerged floating tunnel. The probability response of bending moment and displacement in the central span of submersed floating tunnel, including shear response at its buttress are also analyzed. The dynamic behavior of sft is bound to be affected by the action of ocean current. Due to this excitation, the surrounding fluid imposes an additional force on the tunnel. Experimental study on 2d motion characteristics of. Research on tubular segment design of submerged floating.
Compared with the fixed tunnel, the main challenge in designing a sft is the stability maintaining in a complex hydrodynamic environment, especially for. A simplified analysis model of cable for submerged floating tunnel subjected to parametrically excited vibrations in the ocean environment is proposed in this investigation. Submerged floating tunnel is an innovative tunnel infrastructure passing through the deep sea independent of. Study on criterion of vibration stability for tether of. Explore submerged floating tunnels with free download of seminar report and ppt in pdf and doc format. This paper investigates the response of these tunnels considering spatial variation of ground motion excitation. A submerged floating tunnel sft, also called a suspended tunnel or archimedes bridge, is a tunnel that floats in water, supported by its buoyancy specifically, by employing the hydrostatic thrust, or archimedes principle the tube is placed underwater, deep enough to avoid water traffic and weather, but not so deep that high water pressure needs to be dealt withusually 2050 m 60. Compared with the fixed tunnel, the main challenge in designing a sft is the stability maintaining in a complex hydrodynamic environment, especially for the waveinduced dynamic load. Compared with traditional bridges, ferries and undersea tunnels, the sft has special superiority and potential applications.
Dynamic response and fluid structure interaction of submerged floating tunnels s. The submerged floating tunnel sft was an innovative traffic structure for crossing straits and lakes. As the needs of society for regional growth and the protection of the environment have assumed increased importance, in this. Submerged floating tunnel sft is a kind of long distance flexible sea structure. Meanwhile, in the area with high earthquake risk, submerged floating tunnel, the structure with softness and hardness, has better adaptability. 936 researcharticle computationofrayleighdampingcoecientofarectangular. This page contains submerged floating tunnels seminar and ppt with pdf report. Submerged floating tunnel seminar pdf report and ppt.
Abstract this contribution presents the response of a submerged floating tunnel sft anchored by tension legs subjected to seismic excitation. Research on type selection of submerged floating tunnel of. Design of immersed tunnel and how we research submerged. In this paper, after a general presentation of the submerged floating tunnel sft as an attractive technical solution for waterway crossings, the sft prototype to be built in qiandao lake peoples republic of china is introduced. Submerged floating tunnel, wave force, hydrodynamic response, tension leg, physical experiment 1 introduction a submerged floating tunnel sft is a unique marine structure whose hydrodynamic stability is maintained by the balance between the buoyancy and tethering of the structure jakobsen, 2010. Submerged floating tunnels are an interesting solution for crossing deep water ways. Submerged floating tunnel sft is a new structural concept for crossing water. One of the proposals of a tunnel crossing the hogsfjord in norway is used herein as a case study. Assessment of the dynamic behaviors of submerged floating tunnel. As the needs of society for regional growth and the protection of the environment have assumed increased importance, in this wider context the submerged floating tunnel offers new opportunities. Global response of submerged floating tunnel against.
Performance evaluation of submerged floating tunnel subjected to hydrodynamic and seismic excitations article pdf available in applied sciences 711. Seismic response of submerged floating tunnel under. Assessment of the dynamic behaviors of submerged floating. Submerged floating tunnels seminar report, ppt, pdf for. Sumit thakur civil submerged floating tunnels seminar and ppt with pdf report. Pdf submerged floating tunnel sft is a new type of transport structure. Tunnels in water are by no means modern in civil engineering. Structural analyses of the submerged floating tunnel. A typical sft system is mainly composed of the underwater tube body, a series of inclined anchorcables for limiting the deformations of the tube, the deep water foundations and the offshore revetment structures.
Udahl1 1department of structural engineering, norwegian university of science and technology, norway 2department of marine technology, norwegian university of science and technology, norway abstract. Pdf submerged floating tunnel top journal best impact. The purpose of the present study is to develop a dynamic analysis program for sft and investigate dynamic response characteristics of sft subjected to external environmental wave load. The problem of how to cross a wide water area quickly has been focused on by people for a long time.
Effect of cable stiffness and waves parameters on the. The submerged floating tunnel is a tube like structure made of steel and concrete utilizing the law of buoyancy. Pdf challenge in design and construction of submerged. Submerged floating tunnels sft for transportation must be designed to secure passengers safety in case of accidental events. Analysis of wave force induced dynamic response of. Also explore the seminar topics paper on submerged floating tunnels with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year civil engineering ce or ieee civil construction btech, be, mtech students for the year 2015 2016. Study on reliability of submerged floating tunnel with. The submerged floating tunnel concept was first conceived at the beginning of the century, but no actual project was undertaken until recently. As sft is completely submerged in water and is subjected to extreme environmental. Also explore the seminar topics paper on submerged floating tunnels with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year civil engineering ce or ieee civil construction btech, be, mtech students for the year 2015. The similarities and differences between immersed tunnels and submerged floating tunnels sft, also known as archimedes bridge, are explored. Abstract submerged floating tunnels sfts are innovative structural solutions to waterway crossings and are more economical compared to the conventional structures such as cablesupported bridges, underground tunnels or immersed tunnels. A submerged floating tunnel sft, also known as submerged floating tube bridge sftb, suspended tunnel, or archimedes bridge, is a proposed design for a tunnel that floats in water, supported by its buoyancy specifically, by employing the hydrostatic thrust, or archimedes principle. It supported on columns or held in place by tethers attached to.
Archimedes bridge ab is a tubular structure that floats at a certain depth below the surface of the water carrying capacity exploiting derived from. Dynamic response and fluid structure interaction of. The submerged floating tunnel is a tube like structure. Literature list on the subject of submerged floating tunnels including publications such as books, articles and conference papers.
Since about 1900, more than 100 merge tunnels have been extending. Therefore, adhering to the natural conditions of qiongzhou strait, submerged floating tunnel is the best and most suitable scheme for crosssea passageway. The development of submerged floating tunnels as an. Jmse free fulltext experimental study on 2d motion. The probability distribution of buoyancy amplitude of vortexinduced vibration for a submerged floating tunnel with single span under steady flow is studied by means of montecalor method in this paper. The submerged floating tunnel is an innovative concept for crossing waterways, utilizing the law of buoyancy to support the structure at a moderate and convenient depth. Submerged floating tunnel is a new concept, it is a new type of transport structure.