Dynamic response analysis of monorail bridges under moving trains and riding comfort of trains

Abstract

This paper introduces an analytical procedure to derive equations of motion for the monorail train-bridge interaction based on Lagrange's formulation to investigate riding comfort of moving monorail trains on bridges. A 15DOF dynamic model is assumed for a car in a monorail train that consists of driving, steering, and stabilizing wheels. It is based on the finite element method for modal analysis using three-dimensional models for a monorail bridge. Dynamic behaviors of a rationalized monorail bridge with a simplified structural system are investigated in comparison with those of a conventional monorail bridge using the developed analytical method. Riding comfort of running trains on the rationalized monorail bridge based on ISO2631 is estimated using 1/3 octave band spectral analysis. Observations indicate that a rational type bridge does not engender difficulties related to the riding comfort of the monorail train, even when considering the longest traveling time of passengers between terminals.

Effect of train dynamics on seismic response of steel monorail bridges under moderate ground motion

“…The composite steel girder with an RC tramway is another advanced concept to enhance braking performance of monorail trains, even though it makes the advanced bridge heavier than a conventional bridge. Actually, the authors have described in a recent report [1] that advanced bridges are a ected more easily by lateral loading e ects than conventional bridges under a moving train. That fact, together with the advanced scheme described above, suggests that the simpliÿed lateral bracing system and the composite track girder might engender problems related to seismic performance of the bridge.…”

Analysis of WBV on standing and seated passengers during off-peak operation in KL monorail

“…In monorail, each car contains two bogies at its front and rear axles. Each bogie equipped with the set of rubber wheels such as; load wheels used for propulsion, brake and guider wheels, which are used to hold or grip the train with track [3].…”

Dynamic analysis of three-dimensional bridge–high-speed train interactions using a wheel–rail contact model

“…The beam elements, which can describe well the geometry of beam-girder bridges and give an economical finite element solution as well, have widely been used for numerical modeling of simply supported bridges [5,7,11], two-span continuous bridge [4], long suspension bridge [9], lattice bridges [14,21], and arch bridge [22]. Within the same scopes of these bridge types, 3D beam elements constituted by two-nodes, each node having six DOFs as shown in Fig.…”

“…18) and (21). An iterative solution scheme for this 3D bridge-train interaction system is established, in which the two sub-systems are separately integrated using Newmark-β method and the compatibilities at the interface are achieved by iterations.…”