location: Current position: Home >> Scientific Research >> Paper Publications

核电厂桥梁结构-地基动力相互作用精细化分析

Hits:

Indexed by:期刊论文

Date of Publication:2018-07-20

Journal:大连理工大学学报

Volume:58

Issue:4

Page Number:407-413

ISSN No.:1000-8608

Key Words:桩土效应;核安全相关;桥梁;精细化模型;波动输入方法;地震响应

Abstract:某核电厂拟建厂内应急通道桥,这在中国核电领域尚属首次.厂内道桥承担着应急撤离和救援的重要功能,其地震安全十分重要.分别建立了传统的土弹簧模型("m法")和桥梁结构-地基实体单元精细化模型,研究了地基模型以及地震动输入方法对桥墩柱动弯矩的影响.结果表明:在运行安全地震动工况下,土弹簧模型计算的桥墩柱动弯矩比精细化模型小15%~20%;当极限安全地震动时,两者动力响应差距显著增加,达到20%~30%.波动输入方法考虑了地基的辐射阻尼和行波效应,计算的桥墩柱动弯矩比传统的一致输入方法小24%~34%.因此,在开展核电厂重要桥梁结构抗震安全评价时,进行桥梁结构-地基动力相互作用精细化分析是十分必要的.

Pre One:Stochastic seismic response and stability reliability analysis of a vertical retaining wall in front of the pumping station of a nuclear power plant using the probability density evolution method

Next One:Seismic reliability assessment of earth-rockfill dam slopes considering strain-softening of rockfill based on generalized probability density evolution method