Mott MacDonald Bridge Engineer Interview Questions and Answers

Temperature affects the density and stiffness of soil, which in turn affects earth pressure.

• As temperature increases, soil expands and becomes less dense, resulting in reduced earth pressure.

• As temperature decreases, soil contracts and becomes more dense, resulting in increased earth pressure.

• The effect of temperature on earth pressure is more significant in areas with extreme temperature fluctuations.

• The type of soil ...read more

Dynamic analysis is necessary to ensure safety and functionality of bridges under various loads and conditions.

• Dynamic analysis helps to determine the response of a bridge to dynamic loads such as wind, earthquakes, and traffic.

• It is important to consider the effects of dynamic loads on the bridge's natural frequency and mode shapes.

• The steps involved in dynamic analysis include modeling the bridge, selecting appropria...read more

Secondary losses in integral and continuous prestressed structures refer to the loss of prestress due to factors other than elastic shortening.

• Secondary losses can be caused by creep, shrinkage, relaxation, and anchorage slip.

• Creep is the gradual deformation of concrete under sustained load.

• Shrinkage is the reduction in volume of concrete as it dries.

• Relaxation is the loss of prestress over time due to the relaxation o...read more