Currently, founded many non-engineered bridges that are damaged in the remote areas. The alternative to solving the bridge problem in remotes areas for pedestrians is using a truss bridge system with the cold-formed steel material. The truss bridge system is the ideal shape for coldformed steel material that is weak to buckling. This study discusses the effect of different truss shapes to the weight and deflection ratio that occurs due to the pedestrian load on the small span (L = 4m). The proposed truss shape refers to general applied forms that will be developed based on SNI 1725-2016 for loading criteria and cold-formed steel cross-sectional analysis based on SNI 7971-2013. The prototype of truss shape will be tested at the laboratory in model scale. The results of this study will introduce a new truss shape of the cold-formed steel bridge with the smallest deflection Keywords: shape of truss bridge, cold-formed steel, pedestrians, deflection AbstrakPada daerah terpencil banyak ditemui jembatan sederhana (non-engineered bridge) yang mengalami kerusakan. Salah satu alternatif untuk menyelesaikan masalah jembatan pada daerah terpencil untuk pejalan kaki adalah menggunakan jembatan rangka dengan material canai dingin. Jembatan sistem rangka adalah bentuk yang ideal untuk material canai dingin yang rawan mengalami tekuk. Beberapa bentuk jembatan rangka yang banyak diaplikasikan adalah tipe Warren truss, Pratt truss, Howe truss dan K-truss. Penelitian ini membahas pengaruh bentuk rangka terhadap rasio berat dan lendutan yang terjadi akibat beban pejalan kaki pada bentang pendek (L = 4m). Dalam pengembangan bentuk rangka ini mengacu pada bentuk rangka yang banyak diaplikasikan, menggunakan pembebanan sesuai SNI 1725-2016 dan analisa penampang canai dingin berdasarkan SNI 7971-2013. Usulan bentuk rangka yang dihasilkan juga akan dilakukan pengujian beban di laboratorium. Hasil dari penelitian ini diharapkan dapat diusulkan alternatif bentuk rangka baru jembatan canai dingin dengan lendutan yang paling kecil. Kata kunci: bentuk jembatan rangka, canai dingin, pejalan kaki, lendutan 1. Pendahuluan Jembatan merupakan suatu konstruksi bangunan yang memiliki peranan penting untuk menghubungkan antar satu daerah dengan daerah yang lain. Pada daerah terpencil masih banyak kita temui jembatan sederhana (non-engineered bridge) yang biasanya dilewati oleh masyarakat dengan berjalan kaki, dimana hal tersebut dapat membahayakan masyarakat selain umur manfaat jembatan sederhana tersebut yang seringkali tidak panjang dan cepat mengalami kerusakan baik karena beban yang melintas, maupun karena pengaruh alam. Salah satu alternatif untuk menyelesaikan problematika jembatan pada daerah terpencil untuk masyarakat pejalan kaki adalah dengan menggunakan jembatan rangka yang terbuat dari canai dingin (cold formed).Bahan canai dingin memiliki kelebihan dalam hal kemudahan pelaksanaan karena beratnya ringan dan sistem penyambungannya relatif mudah. Namun karena memiliki berat yang ringan dan

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The experimental test was conducted on a new 60 m Steel Truss Bridge at Lumajang East Java. The Purpose of the test to observe the actual condition of the bridge before use for regular traffic. The static and dynamic loading test were applied. For static loading 63% of live load was applied. Several test instruments were installed to record all data during testing. Seven stages of loading were performed during static loading test. The structural analysis also performed as comparison with the experimental result. The experimental test and analytical study showed that the Steel Truss Bridge provides good performance refers to current Indonesian code.

This research discusses the role of transverse reinforcement as seismic reinforced concrete columns confinement. The latest confinement design addressed for columns remains standing under certain level of axial compression and displacement demands. However, this purpose did not consider shear effect. An approach formulation to determine the amount of confinement for reinforcement concrete that account effect of shear is provided. This method is based on combined effects of axial and shear stress that found in coulomb failure criterion. The proposed formulation are tested in 163 column test result data base and compared with several building codes. The result showed that the formulation can reduce amount of confinement safely for most columns.

In the last few decades, massive earthquakes, which can damage many homes and buildings, have often occurred. To slow down or prevent damage from earthquakes, various technologies are needed. From this technology, simulators of ground motion from earthquakes can be used to remind people of the dangers of earthquakes. This paper introduces a portable earthquake simulator to simulate two-dimensional ground motion from an earthquake. Focusing on the design concept, structure, and features of this new simulator, the author discusses its implementation and verifies its feasibility with the results of the initial experiments.