雅叶高速康定过境段超高烈度区桥梁抗震设计  

Anti-seismic Design of Bridge in Ultra-high Intensity Zone of Kangding Transit Section in Yaye Expressway

作　　者：赵智 文丽娜 ZHAO Zhi;WEN Lina

机构地区：[1]四川省公路规划勘察设计研究院有限公司,四川成都610000

出　　处：《城市道桥与防洪》2023年第1期73-78,87,I0010,共8页Urban Roads Bridges & Flood Control

基　　金：四川省科技厅重点研发项目(2020YFS0361);西部交通建设科技项目(2013318800020);四川省交通建设科技项目(2015A1-3)。

摘　　要：为研究超高烈度区中小跨径桥梁抗震设计特点,以康新高速康定过境段互通和主线桥梁设计为工程背景,对非规则桥梁提出多种抗震设计方案,运用非线性时程分析法,对比常规混凝土与钢结构、下部圆柱墩与空心方墩,减隔震设计与延性设计对抗震的影响效果。研究表明:在超高烈度区,采用钢结构梁可以有效减小地震效应;从优化下部墩柱、系梁、盖梁自重等细部构造出发,可得到更卓越的抗震性能;在墩高较高时,减隔震设计方案不一定最合理,设计时需进行减隔震与延性设计方案对比。In order to study the seismic design characteristics of small and medium-sized bridges in the ultra-high intensity zone and taking the design of the bridges in the interconnected and the main lines of Kangding Transit Section in Kangxin Expressway as the engineering background,the multiple seismic design schemes are put forward for the irregular bridges.The nonlinear time history analysis method is used to compare the conventional concrete structure with the steel structure,and the lower cylinder pier with the hollow pier,and the influencing effect of seismic isolation design with ductility design on the seismic resistance.The results show that the steel structural bridge to be used can effectively reduce the seismic effect.More excellent seismic performance can be obtained by optimizing the dead loads of sub-pier column,tie beam,bent cap and other details.When the pier height is high,the seismic isolation design schemes may not be the most reasonable,so it is necessary to compare the seismic isolation design with the ductility design during design.

关 键 词：超高烈度区 非规则 钢混组合结构 细部构造 减隔震与延性设计 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]