斜交简支梁桥纵向地震碰撞反应精细化研究

发布时间：2018-03-08 10:11

本文选题：简支梁　切入点：斜交桥　出处：《振动与冲击》2016年08期 　论文类型：期刊论文

【摘要】：为精细化分析斜交简支梁桥地震碰撞反应,首先基于Hertzdamp碰撞理论,采用开放式地震模拟软件Open Sees建立能够考虑碰撞过程中摩擦作用的斜交简支梁桥精细化计算模型;然后从动力特性、动力反应层面验证模型的可靠性;最后采用三维精细化计算模型分析斜度、摩擦对斜交简支梁桥纵向地震碰撞反应的影响。结果表明:梁体与桥台间最大碰撞力的产生位置随着斜度的变化而改变;最大碰撞力的大小不仅与斜度有关,而且与斜交桥梁端与桥台间摩擦因数也存在一定关系;摩擦作用削弱了斜度对梁端锐角处纵向最大位移的影响,大幅度减少上部结构峰值转角,使峰值转角最大值滞后在较大斜度时出现;不考虑摩擦作用会高估锐角处梁端纵向最大位移反应。
[Abstract]:For the fine analysis of seismic pounding response of skew beam bridge based on Hertzdamp collision theory, using open software Open Sees to establish calculation model considering beam skew bridge friction collision process of fine seismic simulation; then from dynamic characteristics, dynamic response reliability level verification model; finally analysis model of the three-dimensional slope fine, the friction effect on longitudinal seismic pounding response of skew beam bridge. The results show that the maximum impact force of girder and abutment between the position changes with the angle change; not only the collision force and angle, and the skew bridge girder and the abutment friction coefficient also has certain relationship; friction reduced the inclination on the beam end of an angle vertical maximum displacement, greatly reducing the upper peak angle, the peak maximum lag angle It appears at a large slope; without considering the friction effect, the longitudinal maximum displacement response of the beam end at the sharp angle is overestimated.

【作者单位】：石家庄铁道大学土木工程学院;石家庄铁道大学道路与铁道工程安全保障省部共建教育部重点实验室;同济大学土木工程学院;
【基金】：国家自然科学基金项目(51278371) 河北省自然科学基金项目(E2015210038)
【分类号】：U442.55

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