Serviceability analysis of an existing steel piled wharf according to TCHSER-2020

In order to ensure safety, coastal structures must be earthquake-resistant. Therefore, regulations for coastal and harbor structures in our country have been updated with developing technology. This thesis focuses on the static and dynamic analysis of an existing steel piled wharf structure in a shipyard facility, in accordance with the Turkish Coastal and Harbor Structures Earthquake Regulations (TCHSER). To calculate the load of the wharf under analysis, we determined the size of the largest ship to be docked as 40000 DWT. We obtained the wave height and period in front of the structure using the Wind and Deep-Sea Wave Atlas for the Turkish Coasts to find the ship berthing loads and bollard pulling forces that will act on the wharf. The soil profile and soil parameters were determined based on the geological geotechnical survey report data. These parameters were used to determine the behavior of the nonlinear soil springs that define the interaction between the steel piles and the soil under static and dynamic loading. The earthquake effects and performance targets to be considered in the analysis were also determined. The earthquake parameters for DD-2 earthquake level were determined based on the coordinates of the facility location in the AFAD interactive web application. The wharf structure was considered a normal structure. The earthquake design class of the wharf was determined using this data. According to TCHSER (2020), the wharf structure will be solved in two stages. For the wharf, which has been determined as KLÖS=2 and DTS=1, the nonlinear static pushover analysis method will be used in both stages. In the first stage analysis, thrust analysis will be performed at the DD-3 earthquake level to check whether the Limited Damage (SH) performance level has been achieved or not. During the second stage of analysis, the performance level for Collapse Prevention (GÖ) will be achieved at DD-1 earthquake level. The mathematical model of the wharf structure was created using the SAP2000 program for the analyses. The structural system model was based on the survey of the structure, and the material information was obtained from on-site test reports. Prior to the analysis, the program defined static loads and nonlinear springs acting on the wharf. The initial analysis and evaluation of the structure involved determining the effective section stiffnesses using the XTRACT program. Modal analysis was then performed to assess the system. Plastic hinges were defined for the rod elements where plastic hinging was anticipated. The target displacement required for inertia calculations was calculated during the first stage. For the kinematic interaction calculation in TCHSER (2020), seven earthquake records were selected from the PEER Ground Motion Database web-based application. The earthquakes were chosen based on their similarity to those expected at the facility's location. The selected earthquake records were then simulated using the DD-3 earthquake level target spectrum from the AFAD database in the SeismoMatch program. The DeepSoil program was used to analyses simulated earthquake records and determine ground displacements with free ground behavior. The second stage analysis was then conducted for the DD-1 earthquake level to check the performance level of the GÖ. Both first and second stage solutions underwent combined kinematics and inertia interaction result checks. In addition, the static calculation in the SAP2000 model included stress checks for the steel pile, cross section checks for the reinforced concrete pile, and pile bearing capacity checks. After completing the static calculation checks of the wharf structure, it was determined that the SH and GÖ performance levels were met. Therefore, it was concluded that the system can safely operate