Optimization of the Height to Span Ratio of Steel Truss Bridges Based on Internal Force and Weight of the Structure Wulan Sari (a*), Ambar Susanto (a), Riawan Gunadi (a), Arvila Delitriana (b)
a) Department of Civil Engineering, Faculty of Civil Engineering, Politeknik Negeri Bandung, 40559 Bandung Barat,
Indonesia
*ettianasari[at]gmail.com
b) PT. Cipta Graha Abadi, 40134 Kota Bandung, Indonesia
Abstract
Steel truss bridges are one of the most common types of bridge found in Indonesia after prestressed concrete bridges. Ease of construction is the main advantage of this bridge. In the other hand, the weakness of truss bridges is the efficiency of using trusses which depends on the required length of the bridge span. The longer the span, the higher the frame required to keep the stiffness of the bridge structure. Therefore, optimization is needed in the use of truss height relative to the span. The aim of this optimization is to obtain optimal structural weight without disrupting the performance of the bridge structure. From the results of comparative study condutcted in this research, it was found that the height to span ratio for warren type steel truss bridges at the most optimum strength conditions was 0.14 in terms of internal force and weight of the structure. This ratio is able to reduce frame requirements by 22% of the average structural weight of the 4 ratio variation analyzed
Keywords: Optimazation- Steel Truss Bridges- Weight Of Structure- Rise to Span Ration- Internal Force
