论文部分内容阅读
桥梁的抗震加固应根据桥梁的重要性、烈度的高低,修复的难易程度、地基土的情况分别对待,一般说对重要性大的、修复困难的、烈度高的、跨径大的桥梁应重点对待,全面加固。对于一般性桥梁可作一般性加固。对小桥仅对活动支座作些处理。抗震加固应充分考虑桥梁正常营运和使用情况下的要求,应使加固后的桥梁满足这些要求,例如桥梁因温度伸缩所必须满足的变形,上下部结构在活载作用下所产生的变应等。在抗震加固时,根据前面的震害分析看出顺桥向震害远比横向严重,因此加固重点形放在桥梁的顺桥方向。为了能使震后能确保交通不致中断,尽量与邻近公路连通,当有旧桥、旧路、渡口
Aseismic strengthening of bridges should be based on the importance of the bridge, the intensity of the level of ease of repair, the situation of the foundation soil are treated separately, generally speaking, for the importance of rehabilitation of the difficulties, high intensity, large span bridge should Focus on the overall reinforcement. For the general bridge for general reinforcement. Only a small bridge on the activities for some support bearing. Aseismic reinforcement should take full account of the normal operation of the bridge and the requirements of the use of the situation, the bridge should be strengthened to meet these requirements, such as bridge expansion due to temperature deformation must be met, the upper and lower structure under the action of live load caused by the change should be . In the seismic strengthening, according to the previous analysis of seismic damage seen along the bridge to the earthquake damage is much more serious than the horizontal, so focus on strengthening the bridge in the direction of the bridge. In order to make sure the traffic will not be interrupted after the earthquake, as far as possible with the adjacent highway connectivity, when there are old bridge, old road, ferry