论文部分内容阅读
为明确长联大跨连续梁桥应用锁死销减震的布设方法,以某铁路主桥(62.5+5×96+62.5)m连续梁桥为工程背景,利用ANSYS建立整体有限元模型,以四种地震波为激励源,对不同锁死销布设数量连续梁桥的地震响应进行非线性时程分析,探求连续梁桥滑动墩墩顶锁死销布设数量的取值范围,进一步以不同墩高、不同跨数的连续梁桥为研究对象,对研究所得锁死销布设数量取值范围进行适用性分析,并研究了锁死销最佳布设位置.结果表明:长联大跨连续梁桥利用锁死销减震可明显改善连续梁桥抗震性能,锁死销布设数量取值范围较为宽泛.当锁死销布设数量小于墩台数量时,在固定墩两侧及紧邻端部墩台的桥墩上进行锁死销布设可取得最佳减震效果.
In order to clarify the layout method of locking bolts for long continuous long span continuous girder bridges, taking the 62.5 + 5 × 96 + 62.5 m continuous girder bridge as the engineering background, the finite element model of ANSYS Four kinds of seismic waves are used as the excitation source. Nonlinear time-history analysis is carried out on the seismic responses of a number of continuous girders with different locking pins. The range of the number of locking pins arranged on the top of the sliding pier is explored. With different pier height , The different span span continuous girder bridge is taken as the research object, the applicability of the locking bolt distribution is analyzed, and the best location of the locking pin is studied.The results show that the long span long span continuous girder bridge The damping effect of the locking pin can obviously improve the seismic performance of the continuous girder bridge, and the range of the number of the locking pin is quite wide.When the number of the locking pin is less than the number of pier, on both sides of the fixed pier and piers abutting the end abutment On the lock pin arrangement can achieve the best damping effect.