This paper first develops the approaches to determine the geopotential of the local mean sea level,and then investigates the offset of the 1985 vertical datum surface defined by the mean sea level of Yellow Sea at the...This paper first develops the approaches to determine the geopotential of the local mean sea level,and then investigates the offset of the 1985 vertical datum surface defined by the mean sea level of Yellow Sea at the Dagang Tide Gauge in Qingdao city using the developed approaches and GPS/leveling data.It shows that the geopotential of the local mean sea level at the tide gauge is equal to 62 636 853.5±0.2 m2·s -2 and that the 1985 vertical datum surface is 24.6±5.4 cm above the geoid realized by the geopotential W 0= 62 636 856.0±0.5 m2·s -2.展开更多
Bridges are the most useful part in the transportation network.Any disruption of the bridge structures may hamper the whole transportation system.In the last recent tsunamis,numerous number of bridges were structurall...Bridges are the most useful part in the transportation network.Any disruption of the bridge structures may hamper the whole transportation system.In the last recent tsunamis,numerous number of bridges were structurally damaged by the tsunami waves.Lack of proper provisions of tsunami forces in the design guidelines also contributes to the augmentations of the damage level.Therefore,proper evaluation of the tsunami forces on the bridge girder should be introduced in the design promptly.In this study,laboratory experiments were carried out to reveal the damage mechanism of the bridge girder by assessing the exerted tsunami forces.Both broken and unbroken waves were considered for the analysis.The results showed that measured forces were larger for broken waves than those of unbroken waves.Maximum force of the broken waves was 4.59 times as large as the hydrostatic pressure.Also,waves reached the peak value more rapidly for larger wave heights than those of smaller ones.Additionally,a girder that is placed at a higher position is much vulnerable to tsunami hazard.展开更多
This paper establishes the global existence of classical solution to the system of homogeneous,isotropic hyperelasticity with time-independent external force,provided that the nonlinear term obeys a type of null condi...This paper establishes the global existence of classical solution to the system of homogeneous,isotropic hyperelasticity with time-independent external force,provided that the nonlinear term obeys a type of null condition.The authors first prove the existence and uniqueness of the stationary solution.Then they show that the solution to the dynamical system converges to the stationary solution as time goes to infinity.展开更多
文摘This paper first develops the approaches to determine the geopotential of the local mean sea level,and then investigates the offset of the 1985 vertical datum surface defined by the mean sea level of Yellow Sea at the Dagang Tide Gauge in Qingdao city using the developed approaches and GPS/leveling data.It shows that the geopotential of the local mean sea level at the tide gauge is equal to 62 636 853.5±0.2 m2·s -2 and that the 1985 vertical datum surface is 24.6±5.4 cm above the geoid realized by the geopotential W 0= 62 636 856.0±0.5 m2·s -2.
基金supported by the University of Malaya and Ministry of Education,PPP fund(Grant No.PG 029-2012B)the High Impact Research Fund(Grant Nos.H-16001-00-D000061,J-16002-00-7383000-000000)
文摘Bridges are the most useful part in the transportation network.Any disruption of the bridge structures may hamper the whole transportation system.In the last recent tsunamis,numerous number of bridges were structurally damaged by the tsunami waves.Lack of proper provisions of tsunami forces in the design guidelines also contributes to the augmentations of the damage level.Therefore,proper evaluation of the tsunami forces on the bridge girder should be introduced in the design promptly.In this study,laboratory experiments were carried out to reveal the damage mechanism of the bridge girder by assessing the exerted tsunami forces.Both broken and unbroken waves were considered for the analysis.The results showed that measured forces were larger for broken waves than those of unbroken waves.Maximum force of the broken waves was 4.59 times as large as the hydrostatic pressure.Also,waves reached the peak value more rapidly for larger wave heights than those of smaller ones.Additionally,a girder that is placed at a higher position is much vulnerable to tsunami hazard.
基金supported by the National Natural Science Foundation of China (Nos. 11121101,10728101)the National Basic Research Program of China (973 Program) (No. 2007CB814800)+1 种基金the 111 Project(No. B08018)SGST (No. 09DZ2272900)
文摘This paper establishes the global existence of classical solution to the system of homogeneous,isotropic hyperelasticity with time-independent external force,provided that the nonlinear term obeys a type of null condition.The authors first prove the existence and uniqueness of the stationary solution.Then they show that the solution to the dynamical system converges to the stationary solution as time goes to infinity.
