简支波形腹板钢箱组合截面与传统截面箱梁桥抗震性能对比分析  

Seismic performance comparative analysis of simply supported steel-box composite girder bridges with corrugated webs and other box-girder bridges

作　　者：赫中营[1] 高嘉 孙鹏辉 王根会[2] He Zhong-ying;Gao Jia;Sun Peng-hui;Wang Gen-hui(School of Civil Engineering and Architecture,Henan University,Kaifeng 475000,China;School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]河南大学土木建筑学院,河南开封475000 [2]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《工程抗震与加固改造》2024年第1期83-92,82,共11页Earthquake Resistant Engineering and Retrofitting

摘　　要：为研究波形腹板钢箱-混凝土组合梁桥(CW-SBCCGB)与传统箱梁桥抗震性能的异同,基于截面等效原理,根据某实际工程CW-SBCCGB的单箱截面,等效出波形腹板混凝土箱梁桥(CW-CBGB)和混凝土箱梁桥(CBGB)的单箱截面,再结合动力分析理论和ABAQUS有限元模型对比分析3种截面简支梁桥动力特性和抗震性能的不同。结果表明:3种截面简支梁桥前五阶振型不变,CW-CBGB和CBGB前三阶频率相比于CW-SBCCGB有所下降,但相差不超过1Hz,第四阶及以后频率差异逐渐变大;剪滞效应对CW-SBCCGB和CW-CBGB动力特性影响较大,对CBGB影响较小;在纵桥向+竖桥向和横桥向+竖桥向地震作用下,CW-SBCCGB和CBGB的墩顶位移和跨中位移均大于CW-CBGB结构,CW-SBCCGB主梁跨中截面剪力最小,CW-CBGB跨中截面弯矩最小,说明CW-SBCCGB和CW-CBGB的抗震性能均优于CBGB的抗震性能。In order to study the seismic performance differences between the steel box-concrete deck composite girder bridge with corrugated webs(CW-SBCCGB)and the traditional box girder bridge,according to a CW-SBCCGB section in practical project,the section of concrete box girder bridge with corrugated steel webs(CW-CBGB)and concrete box girder bridge(CBGB)are established based on the section equivalence principle.Combining the dynamic analysis theory and finite element model established by software ABAQUAS,the similarities and differences of dynamic characteristics and seismic performance of three simply supported beam bridges with different sections are compared and analyzed.The results show that the first to fifth orders mode shape of the three types of simplesupported beam bridge are unchanged,the first to third order frequencies of CW-CBGB and CBGB decrease compared with that of CWSBCCGB,and the difference between them does not exceed 1 Hz,but the difference becomes larger after the fourth order and beyond.The shear-lag effect has a greater effect on the dynamic characteristics of CW-SBCCGB and CW-CBGB,and a smaller effect on CBGB.Under the longitudinal and vertical earthquake action,and horizontal and vertical earthquake action,the pier top displacement and mid-span displacement of CW-SBCCGB and CBGB are larger than those of CW-CBGB,the shear force at the mid-span section of CWSBCCGB is the smallest,and the bending moment at the mid-span section of CW-CBGB is the smallest,which indicates that the earthquake resistant performance of CW-SBCCGB is better than that of CW-CBGB and CBGB.

关 键 词：抗震性能 波形腹板钢箱-混凝土组合梁桥 波形腹板混凝土箱梁桥 混凝土箱梁桥 截面等效 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]