Estimation of Expected Sliding Distance of a Caisson Affected by Damage of Armor Concrete Blocks

Takayama, T.; Tsujio, Daiki; Yasuda, Tomohiro

doi:10.1142/9789814277426_0302

Cited by 2 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Figure 15, the black line shown in Figure 14a-c is presented as a black dotted line in each of the images in Figure 15a-c. Meanwhile, the red line in each of the figures shows a fitted curve that gives a parameterization of the dotted line in Figure 15a-c, which is expressed as an empirical formula in Equations ( 7)- (9). Hence, values of p T11 , p T12 , or p T13 can be obtained by applying Equations ( 7)-( 9) to p T01 , which is readily obtained from Goda's formula.…”

Section: Parameterization Of Vertical Profiles Of the Horizontal Pres...mentioning

confidence: 99%

“…Indeed, for instance, the caisson breakwater installed at Mutsu-Ogawara port in Japan was severely damaged in 1991 because the armor blocks in front of the caisson had been scattered by storms, which allowed impulsive wave loading on the disclosed section of the caisson [7,8]. In a laboratory experiment, Takayama et al [9] reported that settlement of the armor blocks caused an increase of wave force on the caisson. In addition, Mase et al [10] analyzed the stability of composite breakwater assuming the settlement of armor blocks in front of the breakwater, and they demonstrated that the sliding distance of a caisson was reduced when the settled blocks were repaired.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Investigation of Horizontal Wave Pressure on the Caisson Protected by Armor Blocks on the Rubble-Mounted Core

Oh¹,

Lee²

2020

JMSE

View full text Add to dashboard Cite

The horizontal wave pressure on the front wall of the caisson protected by armor blocks on the rubble-mounted core is investigated by carrying out physical experiments. There have been few previous studies regarding this type of structure, and the characteristics of horizontal wave pressure on the structure are still unclear. Considering this, a series of experiments were performed by changing the configuration of the coverage rate in front of the caisson and the shoulder width of the armor blocks. For each of the different configurations of the model setup, wave pressure on the caisson was measured under 20 regular waves of different wave periods and heights. By analyzing the obtained experimental data, it was possible to quantify the effects of the coverage rate and the shoulder width on the wave pressure. The wave pressure tended to increase up to maximally 1.5 to 2 times at the exposed part of the caisson if it was incompletely protected. In addition, the wave pressure at the top part of the caisson was substantially reduced with the increase of the shoulder width of the armor layer. Based on these results, adjustment factors for evaluating such effects have been suggested, which can be applicable for the practical design of the caisson covered with armor blocks on the rubble-mounted core.

show abstract

Section: Parameterization Of Vertical Profiles Of the Horizontal Pres...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Horizontal Wave Pressure on the Caisson Protected by Armor Blocks on the Rubble-Mounted Core

Oh¹,

Lee²

2020

JMSE

View full text Add to dashboard Cite

show abstract

“…and Shimosako et al (2006) and Takayama et al (2007) proposed a performance design procedure that treats the expected sliding distance of a caisson in a service time to evaluate the stability of the breakwater. Shimosako et al (2006) applied the reliability design to a breakwater armored with wave-dissipating blocks, where the damage and subsidence of block section were not considered.…”

mentioning

confidence: 99%

“…Shimosako et al (2006) applied the reliability design to a breakwater armored with wave-dissipating blocks, where the damage and subsidence of block section were not considered. Takayama et al (2007) extended Shimosako et al's method to include the effect of the subsidence of block section and the resulting effect of the increase in wave force due to the subsidence. There are few studies that deal with the effects of climate change for the design of a caisson breakwater.…”

mentioning

confidence: 99%

Stability analysis of composite breakwater with wave-dissipating blocks considering increase in sea levels, surges and waves due to climate change

Mase

Tsujio²,

Yasuda

et al. 2013

Ocean Engineering

Self Cite

View full text Add to dashboard Cite

Settlement of wave-dissipating blocks in front of a caisson is caused by displacement and breakage of blocks directly by wave action and also by sliding of the caisson by wave force. The settlement of blocks, caisson sliding and wave pressure are mutually correlated. The present study has developed a stability analysis method for a composite breakwater with wave-dissipating blocks under the circumstances of climate change effect as seen in sea level rise and increase in storm surges and waves. It is found that the changes of expected caisson sliding distance and necessary caisson width, determined from the allowable excess probabilities for three prescribed sliding distances, against the weight of wave-dissipating block have a tendency to be maximum at certain block weight when repairing of damaged blocks is not done; on the other hand, if repairing is done every time after reaching 5 % damage level of total section, the changes of caisson sliding distance and necessary caisson width against the block weight show monotonous decrease. The effects of climate change on the sliding distance and necessary width are found to make those values larger 10 ~ 60 % than those calculated by constant external forces given from the present climate conditions.

show abstract

Estimation of Expected Sliding Distance of a Caisson Affected by Damage of Armor Concrete Blocks

Cited by 2 publications

References 0 publications

Experimental Investigation of Horizontal Wave Pressure on the Caisson Protected by Armor Blocks on the Rubble-Mounted Core

Experimental Investigation of Horizontal Wave Pressure on the Caisson Protected by Armor Blocks on the Rubble-Mounted Core

Stability analysis of composite breakwater with wave-dissipating blocks considering increase in sea levels, surges and waves due to climate change

Contact Info

Product

Resources

About