analysis and design of three span suspension bridge using midas civil

Prestressed member, which are free from tensile stress under working loads, the cross section is more efficiently utilized than reinforced concrete section.

When the span is high reinforced concrete construction is uneconomical due to increase in depth of span. Normally the type of construction used is reinforced concrete construction, steel construction or steel composite construction. Bridges are the key elements in any road network and use of pre-stress girder type bridges gaining popularity in bridge engineering fraternity because of its better stability, serviceability, economy, durability, aesthetic appearance and structural efficiency. Key Words: Cable-stayed bridge, nonlinear analysis, geometric and material nonlinearities, cable sag effect.īridge construction today has achieved a worldwide level of importance. The results show that among all sources of nonlinearities cable sag effect having more contribution than other two types of nonlinearities. This earthquake records are input in the bridge longitudinal direction, vertical direction, and combined longitudinal and vertical directions to evaluate the seismic response of the bridge. Strong earthquake records of the Bhuj earthquake of 2001 in India is used in the analysis. The seismic response analyses have been conducted from the deformed equilibrium configuration due to loads. The example bridge is a cable-stayed bridge with a central span length of 110 m with different cable layouts namely, Radial, Harp and Fan type. Material nonlinearity arises is also considered during the analysis. The geometric nonlinearities come from the stay cable sag effect, axial force-bending moment interaction, and large displacements. Both geometric and material nonlinearities are involved in the analysis. This study investigates the nonlinear behavior of cable-stayed bridges.

Analysis and design of three span suspension bridge using midas civil