Investigations on train‐induced vibration and vibration control of an over‐track building using thick‐layer rubber bearings

Abstract

A large number of over-track buildings have been designed in metropolis during the recent decades for adapting to rapid urbanization and saving land resources. However, the over-track buildings are potentially affected by train-induced vibration that may cause discomfort or health problem for residents, which in turn needs to be carefully evaluated. In this study, the responses of a high-rise over-track building with three different transfer types have been investigated using the recorded threedimensional accelerations from in-situ tests. By performing time history analyses, the vibration responses of the fixed structure, traditional rubber bearing (TrRB) isolated, and thick-layer rubber bearing (ThRB) isolated structures are analyzed and evaluated, respectively. The results show that the most evident vibration is in the vertical direction with vibration energy mainly concentrated among the high frequencies. Thereafter, the effects of vibration control by using different isolation technologies are compared. It is demonstrated that the abilities to isolate vertical train-induced vibration could be enhanced by using ThRB while the horizontal isolation performance is still guaranteed. Then the reason for the variation of vibration amplitude along the building height is discussed. This research enriches the train-induced vibration database and exemplifies the vibration mitigation control and design for over-track buildings.

Evaluation of indicators of railway-induced annoying vibration based on building measurements developed by TOD: a discussion

“…The purpose of this measurement is to collect acceleration and velocity data on environmental vibrations in buildings caused by train operation. Previous studies have shown that within buildings environmental vibrations are mainly influenced by vertical vibrations, with the greatest vibrations occurring at the center of the floorboard [32][33][34]. For this reason, vertical vibration in the center of the floorboard is used as a standard test point in many standard codes to assess ambient vibration in buildings.…”

Structural Vibration Comfort: A Review of Recent Developments

“…The difference between the two is whether the vibrations propagate primarily in the soil. The representative buildings of the first type include integrated station-bridge structures [42][43][44][45], buildings with carriageways inside [46,47], and railway overtrack buildings [48][49][50], among others. Their common characteristic in structural construction is that the track or carriageway is rigidly connected to the structure, and the vibration is primarily propagated within the structure.…”

“…Vehicle-induced excitation typically spans a broad frequency range, posing the challenge of frequency shifting. Initially, researchers investigated the impact of traditional seismic isolation bearings on vertical railway-induced vibration isolation [49,230,231]. Subsequently, the concept of integrated control of engineering and seismic vibrations in China has led to a surge in research interest in three-dimensional vibration isolation bearings (3D-VIB) that can effectively address both seismic and vehicle-induced vibrations [232].…”

Seismic performance analysis of steel frame structures with separated three‐dimensional isolation

“…To provide a complete protection of the structure and important nonstructural components, scholars have proposed the three‐dimensional (3D) base isolation technology to mitigate the transmission of the ground motions to the superstructure in both horizontal and vertical directions. Many types of 3D and vertical isolators such as rubber bearings, steel spring bearings, air spring bearings, and so on, were developed and investigated 9–20 . Generally, to effectively mitigate the vertical seismic responses, a relatively low vertical stiffness of the 3D base isolator is desired to extend the vertical natural period of the structure from the dominant period range of the vertical excitations.…”

“…Many types of 3D and vertical isolators such as rubber bearings, steel spring bearings, air spring bearings, and so on, were developed and investigated. [9][10][11][12][13][14][15][16][17][18][19][20] Generally, to effectively mitigate the vertical seismic responses, a relatively low vertical stiffness of the 3D base isolator is desired to extend the vertical natural period of the structure from the dominant period range of the vertical excitations. However, it becomes very costly and difficult for the long period 3D isolator to carry heavy vertical load because of the stability problem and limited material properties of the isolator.…”