Evaluasi Kinerja Struktur Jembatan Yogyakarta-Bawen Dengan Pilar Tunggal Menggunakan Metode Analisis Statik Nonlinier

Al Munawaroh, Patma (2026) Evaluasi Kinerja Struktur Jembatan Yogyakarta-Bawen Dengan Pilar Tunggal Menggunakan Metode Analisis Statik Nonlinier. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Jalan Tol Yogyakarta–Bawen terdiri atas struktur at grade dan struktur elevated. Pada struktur Elevated 2 digunakan sistem pilar tunggal (single pier) yang berfungsi sebagai elemen utama dalam menahan beban vertikal dan lateral. Mengingat ruas jalan tol ini berada di wilayah Daerah Istimewa Yogyakarta dengan tingkat bahaya gempa yang tinggi, evaluasi kinerja seismik struktur pilar tunggal menjadi penting karena sistem tersebut memiliki respons yang lebih sensitif terhadap deformasi lateral dibandingkan pier portal. Penelitian analisis statik nonlinier (pushover analysis) pada Jalan Tol Yogyakarta–Bawen sebelumnya telah dilakukan pada struktur pier portal sehingga diperlukan evaluasi terhadap struktur pilar tunggal untuk melengkapi kajian kinerja seismik pada kedua tipe pier yang digunakan pada ruas jalan tol tersebut. Oleh karena itu, penelitian ini bertujuan untuk mengevaluasi kinerja seismik struktur pilar tunggal melalui analisis karakteristik respons struktur serta pengaruh interaksi tanah–fondasi. Penelitian diawali dengan studi literatur, pengumpulan data, dan penentuan parameter analisis. Selanjutnya dilakukan verifikasi dan validasi parameter pemodelan dan analisis yang akan digunakan pada analisis pilar tunggal. Verifikasi dilakukan menggunakan spesimen kolom tunggal berdasarkan jurnal acuan dengan menerapkan parameter yang sama, sedangkan validasi dilakukan melalui perbandingan kurva kapasitas hasil analisis dengan kurva kapasitas pada jurnal tersebut. Parameter analisis yang telah terverifikasi dan tervalidasi kemudian digunakan pada analisis pilar tunggal. Sebelum analisis dilakukan, struktur penuh Elevated 2 dimodelkan untuk memperoleh reaksi tumpuan Lead Rubber Bearing (LRB) yang selanjutnya digunakan sebagai pembebanan pada model struktur bawah yang terdiri atas empat pilar tunggal (single pier), yaitu Pier P37, P38, P39, dan P40. Analisis statik nonlinier (pushover analysis) kemudian dilakukan pada masing-masing pier dengan kondisi fixed base dan spring support untuk mengevaluasi karakteristik respons dan kinerja seismik struktur. Hasil penelitian menunjukkan bahwa kondisi pemodelan fondasi memengaruhi respons nonlinier struktur single pier. Model spring support menghasilkan kapasitas deformasi yang lebih besar dibandingkan fixed base akibat pengaruh interaksi tanah–fondasi. Evaluasi kinerja menunjukkan bahwa seluruh pier berada pada tingkat Immediate Occupancy (IO) dan Life Safety (LS) tanpa mencapai Collapse Prevention (CP), sehingga struktur memenuhi kriteria kinerja seismik dan dinyatakan aman terhadap gempa rencana.
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The Yogyakarta–Bawen Toll Road consists of at-grade and elevated structures. The Elevated 2 structure employs a single-pier system that serves as the primary structural element in resisting vertical and lateral loads. Since this toll road is located in the Special Region of Yogyakarta, which has a high level of seismic hazard, evaluating the seismic performance of the single-pier structure is important because this structural system exhibits a greater sensitivity to lateral deformation than portal piers. Previous nonlinear static (pushover analysis) studies on the Yogyakarta–Bawen Toll Road have focused on the seismic performance evaluation of portal piers. Therefore, an evaluation of the single-pier structure is required to complement the seismic performance assessment of the two pier types used along the toll road. Accordingly, this study aims to evaluate the seismic performance of the single-pier structure through the analysis of structural response characteristics and the influence of soil–foundation interaction. The study began with a literature review, data collection, and the determination of analysis parameters. Subsequently, verification and validation of the modeling and analysis parameters to be used in the single-pier analysis were carried out. Verification was conducted using a single-column specimen based on a reference journal by applying the same parameters, while validation was performed by comparing the resulting capacity curve with the capacity curve presented in the reference journal. The verified and validated analysis parameters were then applied to the single-pier analysis. Prior to the analysis, the complete Elevated 2 structure was modeled to obtain the Lead Rubber Bearing (LRB) support reactions, which were subsequently used as loading inputs for the substructure model consisting of four single piers, namely Pier P37, P38, P39, and P40. Nonlinear static (pushover analysis) was then performed on each pier under fixed-base and Spring-support conditions to evaluate the structural response characteristics and seismic performance. The results indicate that foundation modeling affects the nonlinear response of the single-pier structure. The Spring-support model provides greater deformation capacity than the fixed-base model due to soil–foundation interaction. The performance evaluation shows that all piers remain within the Immediate Occupancy (IO) and Life Safety (LS) performance levels without reaching Collapse Prevention (CP), indicating that the structure satisfies the required seismic performance criteria and remains safe under the design earthquake.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Analisis Pushover, Struktur Elevated, Kinerja Seismik, Pilar Tunggal, Interaksi Tanah-Fondasi, Pushover Analysis, Elevated Structure, Seismic Performance, Single Pier, SoilFoundation Interaction
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering) T Technology > TA Engineering (General). Civil engineering (General) > TA775 Foundations. T Technology > TA Engineering (General). Civil engineering (General) > TA780 Piles and pile-driving
Divisions:	Faculty of Vocational > 22301-Civil Infrastructure Engineering (D4)
Depositing User:	Patma Al Munawaroh
Date Deposited:	31 Jul 2026 03:59
Last Modified:	31 Jul 2026 03:59
URI:	http://repository.its.ac.id/id/eprint/140690

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