单次交通荷载作用下低填方刚性涵洞的动力响应研究OA

On the basis of summarizing the simplified simulation of traffic load,static analysis and dynamic analysis of traffic load,the distribution and influence of dynamic stress and dynamic displacement of culverts under the action of a single traffic load are studied through numerical simulation and current standards.,and finally focus on studying the effects of different parameters on the dynamic response of the culvert.The results show that:(1)the moment when the maximum vertical displacement of the culvert top appears is not the moment when the load reaches the maximum;(2)the moment when the maximum vertical stress on the culvert top occurs is almost synchronized with the load application process,but the stress transferred to the culvert top Relative to the applied wheel pressure,it is very small;(3)As the wheel pressure amplitude increases,the maximum displacement and permanent vertical displacement of the culvert top increase significantly;(4)The vertical displacement of the culvert top does not increase with the increase of vehicle speed.Large and increasing,the vehicle speed at a certain moment in the middle will have the greatest impact on the vertical displacement of the culvert;(5)The presence or absence of the pavement structural layer has a great impact on the displacement and deformation of the culvert;(6)The modulus of the road base layer can significantly reduce the culvert vertical displacement.