【摘要】 通过多跨联合的横向地震激励的流固耦合计算分析,研究了横向地震激励下槽身的扭转效应。研究结果表明,在横向地震作用下,每跨两端支撑刚度的差异对槽身的扭矩影响不大,但是地震附加扭矩对槽身两端截面正应力的影响较大;对于简支槽身的渡槽,以跨中截面的弯曲内力作为控制条件来设计整个槽身是可以满足结构抗震安全要求的。更多还原

【Abstract】 Torsion of a multi-span aqueduct body under lateral seismic excitation was studied by computational analysis of fluid structure interaction(FSI).The results show that under the condition of lateral earthquake waves,a difference in the stiffness at both ends of each aqueduct span has little influence on the torque of the aqueduct body,while the additional earthquake torque has a significant influence on the normal stresses of both end sections.For a simply supported beam aqueduct,the requirements of anti-seismic safety for its entire structure can still be met if the moment at the center section is adopted as the design threshold of its structure body.更多还原