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总结了LRB体系连续梁桥的优越性,讨论了考虑桩-土共同作用时隔震性能的研究方法.采用有限元法,自编程序,系统地从行车舒适度、地震作用下的碰撞和动力稳定及其他常见水平荷载作用等方面分析了LRB体系连续梁桥的可靠性.结果表明,LRB体系较之传统的连续梁桥结构具有明显的优越性,考虑桩-土共同作用时,依然具有非常良好的隔震效果,LRB的竖向刚度保证了其行车舒适度不会降低,在制动力、风荷载和温度作用下,LRB体系连续梁桥均表现了良好的可靠性,但必须避免其地震作用下的碰撞,墩较高、大震位移较大时,其动力稳定性能会受到影响.研究成果为工程应用提供了有益的建议和指导.
The superiority of continuous beam bridge with LRB system is summarized, and the research method of seismic isolation considering the interaction of pile-soil is discussed.Using finite element method and self-programming program, this paper systematically analyzes the influences of driving comfort, impact and power under earthquake action Stability and other common horizontal loads, the reliability of LRB continuous girder bridge is analyzed. The results show that the LRB system has obvious advantages over the traditional continuous girder bridge structure. When considering the interaction of pile-soil, Good seismic isolation effect and vertical rigidity of LRB ensure its driving comfort will not be reduced. Under the braking force, wind load and temperature, the LRB system continuous beam bridges show good reliability, but the earthquake must be avoided Under the influence of the collision, the pier is high and the large earthquake displacement is large, its dynamic stability will be affected.The research results provide useful suggestions and guidance for engineering application.