Penilaian Kondisi Visual dan Prediksi Sisa Umur Jembatan Way Gedau Lampung dengan Metode Bridge Management System

Jembatan merupakan prasarana yang erat kaitannya dengan sistem jaringan jalan karena jika terjadi kerusakan pada jembatan, maka lalu lintas akan terganggu. Oleh sebab itu pemeriksaan dan penilaian kondisi jembatan merupakan hal yang sangat penting untuk menjaga jembatan agar berkinerja secara optimal. Tujuan dari kegiatan ini adalah mengidentifikasi kerusakan elemen dan struktur Jembatan Way Gedau sehingga dapat diperoleh gambaran kondisi dan memprediksi sisa umur jembatan. Pemeriksaan inventarisasi dan pemeriksaan detail Jembatan Way Gedau dilaksanakan tahun 2017 menggunakan metode BMS yang telah menjadi rujukan umum pemeriksaan jembatan di Indonesia. Dari data tersebut dilakukan pengolahan data untuk menentukan nilai kondisi. Selanjutnya nilai kondisi digunakan untuk memprediksi sisa umur jembatan dengan persamaan yang dikembangkan oleh Bina Marga. Hasil analisa menujukkan bahwa jembatan mengalami beberapa kerusakan terutama pada elemen lantai jembatan dan bangunan bawah jembatan sehingga dibutuhkan pemeliharaan rutin dan penanganan sementara. Prediksi sisa umur Jembatan Way Gedau adalah 18,89 tahun dengan nilai kondisi jembatan secara keseluruhan sebesar 2 yang berarti kondisi jembatan masuk dalam kategori rusak ringan. Hasil ini menunjukkan bahwa perlu dilakukan pencegahan dan perbaikan terhadap kerusakan elemen yang telah teridentifikasi untuk menjaga kinerja jembatan secara optimal hingga akhir umur rencana.

CONDITION ASSESMENT OF GLENDENG BRIDGE USING BRIDGE MANAJEMENT SYSTEM (BMS) IN TUBAN DISTRICT

The valuation of Glendeng Bridge condition in Tuban District is needed to evaluate the deterioration of the bridge caused by the Bengawan Solo river flooding since the high rainfall which was made worst by the excavation of the bridge protection structure. This research is conducted through the direct visual survey by recorded the detail element of the bridge deterioration based on the deterioration code and assessed the level of severity and structural condition whether the element affecting the other element and suffering the overall bridge condition. This valuation of the bridge is based on the Bridge Management System (BMS) which was being studied by the Pusjatan Ministry of Public Work in 2012. The research shows that the main element deteriorated was the approach embankment, retaining wall, rubber bearing and earthquake dump isolator on the north side of Tuban caused by the drainage on the surface, excavation of the front of approach road and the flooding of Bengawan Solo river. The overall condition of the bridge is valuated with 4 (four) mark so that the bridge is needed to have the strengthening and replacement on the deteriorate elements

PEMODELAN JEMBATAN RANGKA DENGAN KOMBINASI TIPE RANGKA DITINJAU DARI LENDUTAN DAN BERAT JEMBATAN

The frame bridge structure has several types of frames, each of which has advantages in accordance with its application. Several studies have shown that the comparison between one frame type and another has the advantage of different strengths. In this study an analysis will be carried out by modeling the modified bridge structure truss type and combined with other types to obtain a structure that has the best strengths. The method used in this study is to model the bridge structure with the help of SAP2000 v20 software. The analysis process in this modeling refers to SNI 1725: 2016 concerning load on bridges, BMS (Bridge Management System) in 1992, and several related regulations. The results of modeling analysis show that the K-truss frame is the best frame by looking at the aspect ratio of the bridge, namely the ratio between deflection and weight of each type. The combination of the K-truss frame type and the warren frame type is the best combination of frame types based on the best deflection and weight values. The deflection value for this type of frame combination is -0.416 mm and the ratio value is 6.017. Keywords: modeling, truss bridge, k-truss, combine

Repair programs development taking into account the presence of high-risk defects on bridges

Introduction. In recent years in Ukraine, the weight and traffic volume of vehicles on the roads have increased significantly. Most of the bridges that are operating on these roads were built according to norms, the design loadings of which are not corresponding to the modern loadings on transport facilities.Problem Statement. The issue of bridges operation with defects of the structure in the condition of limited funding of the road industry become particularly relevant at the present stage, as the age of bridges is constantly increasing, and the resource of their elements is being expiring.Due to limited funding, the economic and time components of the designed models have a significant impact on the quality of performed calculations and the determination of the optimal strategy for performing of repairing work in specified conditions. The choice of planned works is determined during repairing plans development, both for evaluation of the current state of bridges and for determination of predicted bridge repairing terms.Purpose. the purpose of the work is the development of further optimization of the mode of repairs plan development to eliminate existing defects of bridges.Materials and methods. During the determination of repairs cost in the Analytical Expert Bridge Management System (AESUM), the average norms of the work volume were used. This method was limited by the fact that cost calculations were constant and did not consider actual defects of the bridges. The experience of the constructed bridges operation over 40–50 years revealed a significant number of various defects of structure, mainly of spans and piers. The causes of defects are long-term operation without proper maintenance, as well as a number of shortcomings during the design and construction of bridges. In order to further mode optimization of repair plans development, the existing defects on the bridges were studied from the point of view of their impact on the further destruction of certain elements of the bridge, or the facility as a whole, on the acceleration of this process. Such defects have been identified as high risk defects.Results. Scientists of «DerzhdorNDI» SE have developed and applied the technique of repair cost determination by formation of works complex to eliminate existing defects at the inspected facilities. A module for bridge repair planning has been developed considering the need for priority elimination of high risk defects.Conclusions. The technique of repairs cost determination was developed, as well as the module for bridge repair planning considering the need for priority elimination of high risk defects.Keywords: highway bridge, Analytical Expert Bridge Management System (AESUM), repairs cost determination, defect on bridges.

PENILAIAN KONDISI DAN PREDIKSI UMUR SISA BERDASARKAN BRIDGE MANAGEMENT SYSTEM 1993 (STUDI KASUS JEMBATAN ATINGGOLA, PROVINSI GORONTALO)

Bridge inspection is the process of collecting physical data to ensure that the bridge is safe and thus securing the investment value of the bridge. Inspection results are used for planning the program of maintenance, rehabilitation, strengthening, and replacement of bridges. In this study, the assessment of the Atinggola bridge condition, located in Gorontalo Province, Indonesia, uses the reference standard from the Bridge Management System 1993, including the bridge top structure, the bridge bottom structure, complementary structures, and the river basin around the bridge. Previous bridge condition data which are based on the inspection result in 2017 are used as a comparison for the future. Condition values are used to predict the remaining life of a bridge using an equation developed by Bina Marga. Overall result shows the value of the bridge condition is 2 with the predicted remaining life of the bridge is 18.88 years. These results indicate that the bridge suffered minor damage and need routine maintenance. Therefore, the bridge is able to perform optimally until the end of the planned life.