摘要
地震作用是造成桥梁破坏的重要因素之一，设计并制作了一座相似比为1／20的人字形曲线梁桥模型，并对人字形曲线桥梁进行振动台模拟地震试验。主要分析和研究模型桥梁的梁体和桥墩的震害、加速度和位移响应。研究结果表明：梁体和桥墩没有出现较大的震害，说明整体抗震性能良好；曲线梁径向加速度响应较切向加速度响应大，说明桥墩和曲线梁发生了扭转现象，应设置横向抗震挡块或抗扭支座，曲线梁较直线梁的加速度响应先小后大，体现了曲线梁动力响应的复杂性；桥墩和梁体相对位移随着地震烈度的增大而增加，为了防止梁体之间的碰撞而导致倒塌现象，应设置纵向限位装置。
Abstract
Earthquake action is an important factor to cause the destruction of bridges, a shaking table test of a Y-shaped curved beam bridge was done under simulated earthquake.A Y-shaped curved beam bridge model with a similar ratio of 1/20 was designed and produced.The seismic damage acceleration and displacement response of the model bridge were analysed and researched by the test.The results showed that beam and pier did not experience larger damage, indicating good overall seismic performance;radial acceleration response of the model was larger than that of tangential acceleration, indicating torsions occurred in pier and beam, hence stops or lateral torsion bearings should be set, the acceleration response of the curved beam was smaller first than linear beam and then bigger, which reflected the complexity of the dynamic response.Pier and beam relative displacement was increased with the increase in the seismic intensity, in order to prevent collisions between the beams that caused a collapse, so vertical spacing devices should be set.
基金项目
国家自然科学基金(51078306)
陕西省自然科学基础研究计划资助项目(2013JQ7007)
高等学校博士学科点专项科研基金(20106120110004)
西安建筑科技大学重大科技项目创新基金(ZX0901)
陕西省重点学科建设专项资金资助项目(E01004)
NETL
NSTL
维普
万方数据