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1〜20 articles out of 20 articles

Estimation of incident and Reflected Waves in Random Wave Experiments

Port and Airport Research Institute      0248

December, 1976

Wave Laboratory
Yoshimi GODA,Yasumasa SUZUKI,Yasuharu KISHIRA,Osamu KIKUCHI

A technique to resolve the incident and reflected waves from the records of composite waves is presented. It is applicable to both...

The velocity of falling rubbles in quiescent water.

Port and Airport Research Institute      0249

December, 1976


Hidetoshi TAKAHASHI,Motoi KONDO,Taisei KOIWA,MINEO IWASAKI,Yasuo SHIRATORI,Tooru KIKUYA,Yoshihiro SATO,Masaru SAITO,Shigeru MATSUMOTO

The behavior and velocity of falling rubbles in quiescent water depends on their weight, specific gravity, diameter, shape etc. We...

ANNUAL REPORT ON STRONG-MOTION EARTHQUAKE RECORDS IN JANPANESE PORTS, SUPPLEMETARY(1963through 1975, Vertical Component)

Port and Airport Research Institute      0250

December, 1976

Earthquake Resistant Struetures Laboratory
Eiichi KURATA,Susumu IAI,Hajime TSUCHIDA

Digitized data of vertical ground accelerations, their response spectra, and their Fourier spectra are presented corresponding to ...

Corrosion and protection tests of steel in marine environments

Port and Airport Research Institute      0241

September, 1976


Kazuaki ZEN,Masami ABE

Corrosion and protection tests of steel in marine environments were done, and the following results have been obtained.1) Mean cor...

Experiments on lrregular Wave Overtopping Characteristics of Seawalls of Low Crest Types

Port and Airport Research Institute      0242

September, 1976

Wave Laboratory
Yoshimi GODA,Yasuharu KISHIRA

Five types of seawalls were tested with irregular waves equivalent to H'o =5.8m and T 1/3=10sec (model scale of 1/33.3). T...

Properties of Aggregates in Okinawa for Use of Concrete Materials

Port and Airport Research Institute      0240

September, 1976


Hiroshi SEKI,Nobuaki OTSUKI

 Crushed stone and sea sand are generally used for concrete materials in Okinawa because of no river adequate to obtain ordinal ri...

Influence of groins and offshore breakwaters on sea water exchange between inshore and offshore in Suma recreational beach

Port and Airport Research Institute      0243

September, 1976

Head of Marine hydrodynamics Division
Shoji SATO,Hajime KATO,Hisao KIMURA,Kyofumi TAKAMATSU

In Suma Beach of Kobe City, artifical beach nourishment have deen conducted as well as construction of groins and offshore breakwa...

On the protection of sea water pollution by promotion of sea water circulation at/Gappo recreational beach

Port and Airport Research Institute      0244

September, 1976

Head of Marine hydrodynamics Division
Shoji SATO,Hisao KIMURA,Kyofumi TAKAMATSU

At Gappo beach, Aomori City, sea water is being contaminated by polluted water from river stagnating in the rear of the offshore b...

A model experiment on the sea surface cleaning ship (1st report) -On the rubbish sucking ability of the disk rotater type cleaning ship-

Port and Airport Research Institute      0245

September, 1976


Koji ISHIZUKA,Kiichiro FUJII

A model experiment on the rubbish sucking ability of disk roters which are equipped on the sea surface cleaning ships was carried ...

An Experimental Investigation of Wave Reflection, Overtopping and Wave Forces for Several types of Breakwaters and Sea Walls

Port and Airport Research Institute      0246

September, 1976

Breakwaters Laboratory
Katsutoshi TANIMOTO,Suketo HARANAKA,Shigeo TAKAHASHI,Kazuhiro KOMATSU,Masahiko TODOROKI,Mutsuo OSATO

A series of model experiments on wave reflection, overtopping and wave forces have been conducted for the following types of break...

Solutions of consolidation problems by finite elements

Port and Airport Research Institute      0247

September, 1976

Soil Investigations Laboratory
Masaki KOBAYASHI

The main points of finite eiement formulations for pseudo three-and three-dimensional theories of consolidation are summarized. Th...

Investigation on the Stresses of Axes of Cassion Launching Truck

Port and Airport Research Institute      0239

June, 1976


Kiichiro FUJII,Koji ISHIZUKA,Hideyuki SHOJI,Tadao NAKAJIMA

 This technical data presents on the results of the investigation which was carried out second times on the stresses of the axes o...

Theory and Example of Digital Significant Wave Height Indicator

Port and Airport Research Institute      0238

June, 1976

Wave Laboratory
Yoshimi GODA,Tomotsuka TAKAYAMA,Yasuharu KISHIRA

 A digital meter which displays the significant height and mean period of irregular waves on real time basis was developed. The si...

Corrosion of Reinforcing Bars due to Concrete Mixed with Sea Water and Residual Crack (Five Years' Test)

Port and Airport Research Institute      0237

June, 1976


Hiroshi SEKI,Nobuaki OTSUKI,Yoshikazu HORII

 The paper discussed corrosion of reinforcing bars embedded in concrete specimens and change of concrete properties, after being l...

Annual Report on Strong-Motion Earthquake Records in Japanese Ports (1975)

Port and Airport Research Institute      0236

March, 1976

Earthquake Resistant Struetures Laboratory
Eiichi KURATA,Susumu IAI,Hajime TSUCHIDA

 The report presents the results of strong-motion earthquake observation in Japanese ports in 1975; all the accelerograms obtained...

A Comprehensive Environment Assenssment System for Port Planning. (Part 2) -Weighting of Environment Matters from the view point of the Response of Residents-

Port and Airport Research Institute      0235

March, 1976

Port Planing Laboratory
Tomoo ISHIWATA,Hajime INAMURA,Akira KANEKO

 We published A Comprehensive Environment Assessment System for Port Planning on Technical Note of The Port and Harbour Research I...

Statistics of Wave Data Observed at Selected Stations from 1970 to 1974

Port and Airport Research Institute      0234

March, 1976

Costal Obsevation Laboratory
Tomoharu TAKAHASHI,Daijiro KANEKO,Tetsuya SASAKI,Soichi HIROSE,Hiroshi SASAKI,Takeshi SOEJIMA

 In October 1968, an agreement of the Summary to carry out the Wave Observations at Selected Stations was settled in the Bureau fo...

An Annual Report for Wave Observation at Chosen Points

Port and Airport Research Institute      0233

March, 1976

Costal Obsevation Laboratory
Tomoharu TAKAHASHI,Tetsuya SASAKI,Daijiro KANEKO,Takeshi SOEJIMA

 In October of the 43rd year of Showa (1968), The Summary to carry out the Wave Observations at Selected Stations was decided in P...

A Field Test on the Motion of survey Ship

Port and Airport Research Institute      0232

March, 1976


Motoi KONDO,Kiichiro FUJI,Yasuo SHIRATORI,Hideyuki SHOJI,Koji ISHIZUKA,Tadao NAKAJIMA

 This tachnical note presents on the results of the field test on the motion of the catamaran ship UZUSHIO which belongs to The Th...

Numerical Simulation on Tidal Current and Pollutant Dispersion in the Sea of Harima

Port and Airport Research Institute      0231

March, 1976

Marine Diffusion Laboratory
Yasuo KANEKO,Takeshi HORIE,Masaki KASHIMURA,Tomotoki TOYODA,Michio YAZIMA

 This paper describes the numerical simulation of the effect on tidal current and pollutant dispersion in the Sea of Harima and th...