Mechanisms Collapse of Multistory Building and Its Component Behavior Based on Acceleration-Strain Couple Testing System
Traditionally,acceleration sensors are often installed on buildings for strong motion observation,but this method cannot capture the real seismic response of each component of buildings under the earthquake.Therefore,a new acceleration-strain synergy testing system has been developed.When an earthquake occurs,strong-motion seismographs in the system trigger the data collection,and the strain gauge arranged on the components will also simultaneously record strain data.This system is deployed on two veranda-style school buildings for earthquake monitoring.Results show that the new acceleration-strain synergy testing system can simultaneously record the acceleration response and strain response of components during earthquakes,filling the gaps in monitoring the seismic response of structural components left by existing strong motion observation equipment.Furthermore,under small earthquakes,the restraining effect of infill walls will cause the seismic shear force borne by restrained columns on the bottom floor to be several times that of bare columns.When window walls are arranged on both sides of the columns,this internal force concentration phenomenon will be more significant.The uneven distribution of this shear force is often overlooked in seismic design of structures,resulting in a severe underestimation of the seismic requirements for the restrained columns.This can lead to structures being more prone to severe damage or even collapse under the earthquake.
earthquake damage and collapsecomponent mechanical behavioracceleration-strain coupling testing systeminternal force concentrationstrong motion observation
万方数据
维普
