ABSTRACT
This chapter presents the moving load problem in the context of the vehicle-bridge interaction analysis. Section 4.2 presents the effect of vehicle braking on a single span and multi-span continuous bridge deck, together with the influence of parameters such as initial vehicle velocity, road surface roughness (ISO 8608, 1995), braking rise time, amplitude of braking force and vehicle braking location (Law and Zhu, 2005). The analytical vehicle is simulated as a 7 degrees-of-freedom three-axle tractor-trailer vehicle and as a two-axle three-dimensional vehicle model with 7 degrees-of-freedom according to the H20-44 vehicle design loading in AASHTO (2007). Section 4.3 investigates the dynamic loading on a multi-lane continuous bridge due to multiple vehicles moving on top (Zhu and Law, 2002a). The vehicle-bridge interaction is discussed in terms of the impact factor in both set of studies.
