南水北调中线工程泜河渡槽支座选择与抗震研究

Support Selection and Antiseismic Study of the Aqueduct in the Mid-Route of South-to-North Water Transfer Project

在南水北调中线工程渡槽抗震设计中,对渡槽支座进行了优选,采用阻尼抗震球形支座,满足了渡槽对支座承载能力高,受力条件、抗震性能好的要求。通过对渡槽纵、横向支座产生滑动前后的抗震分析,充分利用地震时支座滑动产生的摩擦阻尼作用,达到减震目的,为渡槽支座有关指标选定和上下部结构设计提供了重要依据。由于地震的不确定性和渡槽结构的复杂性,任何理论的可靠性都是相对的,所以应当认识到在构造上采取抗震措施的重要性。合理的抗震计算和有效的抗震措施是不可缺少的两部分,同等重要。

In the aqueduct antiseismic design of the Mid-Route of South-to-North Water Transfer Project,optimized supports are performed-spherical support of damp resistance are used,-the requirements of high loading capacity,good mechanical condition and antiseismic ability are met.Through antiseismic analysis of the longitudinal and transverse of aqueduct support which slip fore-and-aft,frictional damping action which the sliding support give are fully used for the purposes of damping,which provided important basis for the up-and-down structure and the indicators selection about aqueduct support.Because of the uncertainty of earthquake and the complexity of structure,reliability of any theory is relative.So we should realize the importance of anti-seismic measures on structure.The reasonable antiseismic design and effective measure are equally essential.