摘要
利用非线性时程动力分析方法,在江孤路大桥的桥台和盖梁分别安装钢挡块和混凝土挡块时,对下部结构的内力和梁端位移进行比较分析。分析结果表明:地震烈度不高时,钢挡块未屈服不发挥作用;地震烈度高时,钢挡块屈服变形吸收能量,桥墩内力显著减小,梁端位移增大,但位移增大量在可控范围内。研究结果可为今后新型挡块的研究推广提供技术参考。
When steel and concrete check blocks are installed at bridge abutments and capping beams of Jianggulu Bridge,this paper performs comparative analysis for internal force of lower structures and displacement at the end of beams by means of nonlinear time- history dynamic analysis method. The results of analysis show that steel check blocks do not yield and are not functional when the seismic intensity is not high. While the seismic intensity is high,the steel check blocks yield and deform to absorb energy. Internal force of piers decreases remarkably and displacement at the end of beams increases whilethe increase of displacement is controllable. The results of research can provide a technical reference for study and popularization of new type of check blocks in the future.
出处
《公路交通技术》
2015年第6期38-42,共5页
Technology of Highway and Transport
关键词
非线性时程分析
挡块
抗震
结构内力
nonlinear time-history analysis
check block
anti-seismic
internal force of structure
