TY - JOUR ID - 14185 TI - Upgrading the Seismic Capacity of Pile-Supported Wharfs Using Semi-Active Liquid Column Gas Damper JO - Journal of Applied and Computational Mechanics JA - JACM LA - en SN - AU - Dezvareh, Reza AD - Assistant Professor, Faculty of Civil Engineering, Babol Noshirvani University of Technology, Shariati Av., Babol, Mazandaran, 47148 - 71167, Iran Y1 - 2020 PY - 2020 VL - 6 IS - 1 SP - 112 EP - 124 KW - Pile-Supported wharf KW - SALCGD KW - Seismic capacity KW - Vibration control DO - 10.22055/jacm.2019.28242.1466 N2 - One of the most important structures in the ports is the wharf. The most common one is the pile-supported 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. UR - https://jacm.scu.ac.ir/article_14185.html L1 - https://jacm.scu.ac.ir/article_14185_321839675d6b274ae851996138067046.pdf ER -