The Brazilian code NBR 7188 for highway bridge design prescribes a live load model consisting of 3-axle vehicle plus uniform load, which are both affected by an impact factor when considering dynamic effects. It does not play out actual traffic static effects and may be, in some cases, non-conservative. This work presents two configurations developed gathering real database, simulations, modeli...

When eccentric live loads are applied on the deck overhang of steel-box girder bridges, torsional moments, comprising pure and distortional moments generated box sections. The moment bridge girders distorts cross-sections, inducing additional normal stress components causing instability sections in severe cases. Hence, it is essential to install intermediate diaphragms minimize behaviors. Altho...

Enhancing the ease of construction fillers and large-span floors their overall mechanical performance is critical for prefabricated hollow slabs in modular building structures. Therefore, we propose a novel assembly integral two-way floor structure (8.4 × 8.4 m) consisting permanent (BDF ribbed steel mesh box) three precast one-way hollow-core with I-shaped flexural sections to address above pr...

The free vibration analysis of simply supported box-girder bridges is carried out using the finite element method. fundamental frequency determined in straight, skew, curved and skew-curved bridges. It important to analyse combined effect skewness curvature because bridge behaviour cannot be predicted by adding individual effects curvature. At first, an existing model considered validate presen...

In bridge health monitoring, tiltmeters have been used for measuring rotation and curvature; however, their application in dynamic parameter identification has been lacking. This study installed fiber Bragg grating (FBG) tiltmeters on the bearings of a bridge and monitored the dynamic rotational angle. The dynamic features, including natural frequencies and mode shapes, have been identified suc...

Explanation of the excessive deflections of the Koror-Babeldaob (KB) Bridge in Palau is presented. This bridge was built in 1977 by the cantilever method and collapsed 3 months after remedial prestressing in 1996. It was a segmental prestressed concrete girder having the worldrecord span of 241 m (790 ft.) and maximum girder depth of 14.17 m (46.5 ft). The final mid-span deflection was in desig...

A concrete bridge over Interstate 70 east of Denver, Colorado was impacted by a fork lift being transported by a truck moving at a speed of approximately 75 mph. The forklift impacted the east face of the prestressed concrete I-beam bridge girder, resulting in severe cracking and concrete spalling on both sides of the eastmost girder. Polymer-modified repair mortar was used to repair spalled ar...