雅叶高速康定过境段超高烈度区桥梁抗震设计

赵智，文丽娜

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,对非规则桥梁提出了多种抗震设计方案,运用了非线性时程分析法,对比了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。

Abstract:

small and medium-sized bridge models for the study of high intensity zone characteristics of seismic design, with the new high-speed kangding transit section of the interchange and the engineering background of main bridge design, put forward a variety of anti-seismic design of Bridges of the rules, using the nonlinear time history analysis method, compares the conventional concrete, steel structure, and the lower cylinder block with hollow pier, reduce impact on seismic isolation design and ductility design The effect. The results show that the seismic effect can be effectively reduced by using steel beams in ultra-high intensity area. More excellent seismic performance can be obtained by optimizing the sub-pier column, tie beam, cover beam and other details. When the pier height is high, the damping isolation design may not be the most reasonable, so it is necessary to compare the damping isolation design with the ductility design.