This study aims to develop seismic fragility curves for a typical pilesupported WHARF. Fragility curve is one of the popular tools in seismic performance evaluation of a structure. The software FLAC2D was used to simulate the seismic performance of the WHARF structure. Using eight time history records, occurred in past, as seismic loading, incremental dynamic analysis (IDA) was applied for seismic demand estimation. Based on the resulted seismic response matrix the analytical fragility curves were developed. As a prevailing tool, adopted fragility curves are useful for seismic risk assessment. They can also be used to optimize WHARF-retrofit methods.

One of the most important structures in the ports is the WHARF. The most common one is the pilesupported WHARF. This type of WHARF is consisted of a number of piles and one deck which placed on the piles. In addition to the conventional loads that this structure should withstand, in seismic areas, PILE-SUPPORTED WHARFs should have the necessary capacity and strength against seismic excitations. There are some approaches to increase the seismic capacity of the berth. One of these methods is to control the vibrations of the PILE-SUPPORTED WHARF against earthquake loads using a damper. In this research, for the first time, a new semi-active damper called the semi active liquid column gas damper (SALCGD), was used to reduce the response of pile supported WHARF under seismic loads. In the first step by applying different records of the earthquake, the most important parameter of this damper-the optimal opening ratio of the horizontal column-was obtained for this particular structure. In the following, the performances of this damper and its comparison with the tuned liquid column gas damper (TLCGD) were discussed. This study showed that the use of this semi-active damper (SALCGD) reduces the displacement of the PILE-SUPPORTED WHARF by 35% and reduces the acceleration of the structure by 50% on average. In contrast, the passive damper (TLCGD) reduces the displacement of about 20 percent and the acceleration of about 30 percent. Therefore, it was observed that the semi-activation of the damper (SALCGD) had a significant improvement in its performance in controlling the vibrations of PILE-SUPPORTED WHARF.

WHARF is an engineering structure which is constructed generally for loading or unloading of goods. The structure may be constructed on the weak layers like gravel and sand with respect to the bank conditions. In case of incorrect design of this type of structure and its failure, the WHARF activities may be stopped for a long time due to damage to adjacent facilities. For this reason, investigating the behavior of coastal structures against failure factors such as earthquake and the liquefaction due to it, is of great importance. Analysis of WHARF performance against liquefaction is done generally using the numerical methods. In this article using the Flac2D software which has the capability of nonlinear analysis of effective stress and generation of excess pore water pressure in the soil continuum, the liquefaction phenomenon in the soil surrounding the WHARF is simulated using the behavioral model Finn. In continuation, the impact of different earthquake parameters on the WHARF behavior is investigated. Finally, the results of the excess pore water pressure, horizontal displacement, soil settlement and bending moment of piles are presented. Then, the correlation between these parameters and different earthquake parameters is investigated. As the earthquake intensity criteria have great importance in terms of statistical assessment of seismic demand of various types of structures, therefore, in this study in order to investigate the quality of earthquake intensity criteria, the determining indices such as being optimal and applicable, efficiency index, sufficiency with respect to the earthquake magnitude and distance to the center of earthquake propagation are investigated. The results show that compatibility between the earthquake parameters and soil settlement is generally better with respect to other parameters. Keywords: WHARF, liquefaction, dynamic analysis, finite difference method.

The coastal structures such as wharves withstand severe operational conditions during their service life; hence, they are susceptible to damage and reduction in the stiffness of their elements. In this paper, the performance of a damage detection method based on power spectral density is numerically investigated on the dolphin platform of the oil WHARF used for the unloading of crude oil to the refinery. This investigation is held numerically, and the damage is modeled as a percent reduction in stiffness of the elements. For this purpose, the finite-element model of the dolphin is made in the MATLAB software and the effect of surrounding water is considered as the added mass on the elements. To probe the performance of the method on the dolphin model, several assumed damage scenarios with different levels of damage in the structure, are considered. Furthermore, an approach for calculation of the spectral density of excitation using an approximate FRF is introduced. Results prove the success of the method in the identification of the parameters of a stiff coastal structure like a dolphin. Besides, the results from these investigations prove that the added mass significantly affects the damage detection results. The quality and accuracy of the numerical results prove the merits of damage detection by finite-element model updating in the frequency domain. The results of the present study urge the practical assessment of the performance of the method in the future.

Many researchers have investigated seismic performance of pile supported WHARFs, but few studies are conducted to examine the effect of loading and unloading cranes on seismic responses of this type of WHARFs. This was due to an expired belief which considers the crane as a damper for the structure beneath and reduces the seismic responses of the WHARF. Since, ignoring the crane would enhance the safety factor of the design. This research aims to find the impact of crane on seismic responses of a pile supported WHARF. Hence, a common type of pile supported WHARF by specified geotechnical and structural parameters used in Persian Gulf ports with and without crane is 3-D modeled in SAP2000. Assessment of the seismic responses of the WHARF is done via an incremental dynamic analysis. Finally, by using the destruction criterions which are adapted from push-over analysis, fragility curves of the WHARF are proposed in three different moods. Analyzing and observing the resulting values and curves show that a crane does not affect the seismic and vulnerability responses of the WHARF in the direction parallel to the seashore however, in the direction perpendicular to the seashore, despite of the reduction of the WHARF seismic responses the vulnerability responses increase.

The molluscs of Persian Gulf and Oman Sea have high nutritional value with high levels of protein, amino acids and fatty acids. Little researches have been done on determining the nutritional value of the identified species. This study was carried out with the aim of evaluating the nutritional value of the sea snail Babylonia spirata in Kanarak WHARF.Thirty sea snails (with an average length of 22±1.12 mm and an average weight of 7.8±0.14 g) from the mud and sand beds of Kanarak WHARF (Sistan and Baluchistan province) were kept in cold boxes with powdered ice and transferred to the laboratory. Body chemistry, fatty acids and amino acids compositions were used. The results showed that the amount of protein, lipid, ash, moisture, and dry matter was 18.75, 6.49, 3.30, 70.63 and 29.37% respectively. Total essential amino acids and non-essential amino acids were equal to 15.95 g of amino acids/mg.The nutritional value of snail amino acid content is 60.50% compared to egg. The highest amount of amino acid in snail tissue was isoleucine (4.23 mg/g tissue), valine (3.06 mg/g tissue), lysine (1.10 mg/g tissue) and phenylalanine (1.09 mg/g tissue), respectively. In the analysis of the content of fatty acid groups, it was found that the highest amount among saturated fatty acids was palmitic acid (13.40±0.04%), stearic acid (6.29±0.23%), and heptadecanoic acid (6.17±0.18%) respectively.Among monounsaturated fatty acids (MUFA), eicosenoic acid (EPA, 20.80±0.33%) and palmitoleic acid (PA, 12.16±0.36%) showed the highest amount, respectively. While the highest amount of long-chain unsaturated fatty acids was respectively related to linoleic acid (LA, 20.27±0.24%), linolenic acid (LNA, 10.23±0.25%) and arachidonic acid (ARA, 2.08±31%). Also, the amount of eicosasterenoic acid (ETA) and eicosapentaenoic acid (EPA) was reported as 1.10±0.01 and 1.07±0.23%, respectively.The results of this research showed that the presence of amino acids (isoleucine) and fatty acids (linoleic acid) content, gives more economic value to sea snail B. spirata

Marine structures are exposed to harsh sea environments. These structures may suffer physical damages such as collision, explosion, and chemical ones like corrosion during their exploitation. Diagnosis of damages and their repair in these important structures increase their service life. To find the damage to a structural system, it is necessary to consider its effects. According to the theory of structures, the static and dynamic responses of any structure are related to its stiffness. As a result, any sudden change in the stiffness is accompanied by a change in the static and dynamic responses of the structure; thus, it is possible to detect the probable damage in a structural system by changing its responses before and after the damage. Extreme importance of civil structures on the one hand and their expensive maintenance costs on the other hand have led researchers to strive to find more accurate and useful methods for detecting structural damage to their early stages of occurrence. In this regard, wavelet transform, which is a powerful mathematical tool for signal processing, has attracted the attention of many researchers in the field of health monitoring. In this study, based on laboratory and numerical modeling, the damage detection process in the piles of a dolphin WHARF was evaluated using wavelet energy that had high sensitivity to minor changes in a vibration signal. Also, without extracting the analytical equation of the damage index, the exact location of the damage is determined directly by calculating the continuous wavelet transform energy density (Scalogram). Evaluation of the results demonstrated that the proposed method in multiple damage simulation scenarios accurately predicted the location of three damages without any additional errors. While estimating the location of damages is accompanied by error in other methods. Comparison between the results obtained from the proposed method and laboratory results demonstrates the capability of the introduced method to detect multiple damages by calculating the continuous wavelet transform energy density.