针对隧道开挖过程中常见的不良地质体断层和岩溶,进行了地震正演研究.波场快照显示在隧道观测系统条件下,可接受到超前方向断层和岩溶反射的地震波场.其中,断层模型波场清晰,可以发现明显的反射P波、反射S波、透射P波和透射S波;而岩溶模型由于其形态不规则,波场比较复杂,岩溶模型长边为10m、短边为5m时,也可以识别反射P波和转换S波,以上正演结论展示了地震波在断层和岩溶中的传播过程,说明了隧道地震预报的可
A methodology inherent to existing structures is presented for the fatigue safety examination of riveted railway bridges.The suggested approach allows for t
Structural monitoring systems are important in civil engineering.However,traditional structural monitoring systems have disadvantages such as the shorter li
A new evaluation method for the safety of cable bands on the suspension bridges of the Honshu-Shikoku Bridges at the maintenance stage has been established.
When the bridge opened to traffic,its strength and stiffness may reduce and its structure performance degradation can occur under the action of the environm
Practical experiences word-wide in past revealed that the fatigue life oforthotropic steel decks can be much shorter than other major structural members in
The steel truss railway bridge at (A)by River in Sweden was built in 1957 with a span of 32m (105 feet).In 2012 it was replaced by a new steel beam bridge a
There is a need to extend the life of many existing railway bridges.To facilitate this is one of the objects of the EC-FP7-Project MAINLINE,covering a perio
记者从中国证监会有关部门获悉,中国证监会经过多年的积极探索,立足国内实际情况,借鉴国际惯例,初步建立起对证券公司从市场准入、持续跟踪到市场退出三个环节监管的法律法
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