TY - JOUR AU - Awlla, Halmat Ahmed AU - Taher, Nichirvan Ramadhan AU - AKSOY, Hüseyin Suha AU - Qadir, Anwar Jabar PY - 2022/06/08 Y2 - 2024/03/29 TI - Effect of SSI and Fixed-base Concept on the Dynamic Responses of Masonry Bridge Structures, Dalal Bridge as a Case Study JF - Academic Journal of Nawroz University JA - ACAD J NAWROZ UNIV VL - 11 IS - 3 SE - Articles DO - 10.25007/ajnu.v11n3a857 UR - https://journals.nawroz.edu.krd/index.php/ajnu/article/view/857 SP - 89-99 AB - <p>Historical masonry structures are very important as they carry cultural heritage, so it is important to protect these structures from natural disasters such as earthquakes and transferred to the next generations. It is known that masonry structures are weak against earthquakes, therefore, a suitable analysis method for assessment and retrofitting purposes is a must. Generally, the fixed-base concept is used for analysis and design purposes, however, in reality, the structures are not fixed-base but they are resting on soils. The aim of this study is to make a comparison study between dynamic responses of fixed-base and soil-structure interaction (SSI) models for bridge masonry structures, the historical Dalal bridge was selected as the case study. First, the bridge was modeled as a fixed base model, and then three different soil profiles (hard, medium and soft soils) were added to the underneath of the structure. The numerical models were analyzed under Elcentro earthquake record. Results indicating a good agreement between the fixed base and the case of hard soil base. However, considerable differences were observed for medium and soft soil profiles.</p> ER -