The Vibration Serviceability Of Railway Station's Waiting Hall Under Vibration From Human Walking And Running Trains

Along with the broad using of new structural-design technology, new high-strength light materials and new construction methods in the 3-rd generation railway stations, the station structures become more light and more flexible, the spacing and cantilever span become much longer, the bracing structures become more complicate, the layout of the floor become more irregular. Besides, in the construction of the 3-rd generation railway stations, a new structure style called"vehicle-bridge-st-ructure" integrated lead to a result that the columns of the up-construction are directly put on the traffic bridge under the floor which causes the vibration of the running train is directly transmitted to the up-construction. Adding that the natural frequency of the structure is much lower because of the long span, light materials etc., the uncomfortable is easy to happy on the floor because of the match of the frequency of the structure and the vibration load. So this thesis tends to do some figure and evaluation work on the vibration caused by the human and running trains.Some work was done on the classified introduction of the evaluation rules of the vibration serviceability from the vibration amplitude, peaking acceleration, vibration level etc., and we give the using category and method of various criterion. Then we do some comparison work between them using an example vibration from the New Guangzhou Station, from which we make the Vibration-Level rule as the main evaluation method in this thesis. Finally we code a compute program to make the Vibration-Level calculate more convenient.There are two parts to analysis the influence of the occupant human's actions to the structure floor. In the first part we introduce the active influences of the human on the floor, in the other words, the influence of the load of the human walking. Primarily, the mechanical principle and the basic elements such as step-frequency and step-amplitude of the human walking are introduced. Then, the various continual walking load curves are compared, and two theoretic methods to figure the vibration response of a type of one dimension or two dimension structure under the load of human walking load are introduced. Then some comparisons and meaningful conclusions are derived from these two methods. In the second part we introduce the passive influences of the still human on the floor to the vibration of the structure. Firstly, the current study situation and some famous experiments of this area are detailed described and analyzed. Then, several human-structure interaction models are introduced. In the end, we figure out the natural frequency and damp critical of a single still human on the occupied structure on the basis of an experiment done by predecessors which lay a good foundation for the subsequent research.A time-history finite element analysis is then done to calculate the response of the New Guangzhou Station waiting hall's floor and a vibration serviceability evaluation is also done after the calculation is completed. First, we introduce the main structural form and the partition shape of the floor, then we do a time-history analysis for two relatively long span floors of the New Guangzhou Station waiting hall's floor using the classical human walking load-Fourier model and the calculation result is detailed analysis after that. In the end, the responses caused by the crowd activating in the middle of the floor and discrete on the floor are calculated and some valuable conclusions are derived.The response of the New Guangzhou Station waiting hall's floor under the vibration of running train through the station are calculated with a time-history finite element analysis and the vibration serviceability is evaluated after that. First, we do a main introduce to the orbit bridge, vehicle type, calculate condition, parameter selection etc., and then detailed analysis are done from the following aspect including the maximum response in the floor, classical deformation pattern, the distributing form of response in the transverse orientation, classical response history etc. from which we get some valuable conclusions to the projection.