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《公路工程抗震设计规范》是在唐山——丰南、辽南二次大地震之前编写的,这二次大地震给我们提供了很丰富的震害资料,使我们对桥梁震害的认识大大地提高了一步,这些新的认识都没有来得及反映到这本规范中去。这里是根据《公路工程抗震设计规范》中的规定及通过辽南、唐山——丰南地震震害的总结提出如下的一般规定: 一、抗震设防的起点一般为8度,但对下列桥梁和桥梁部位的设防起点为7度: (一)、修建于地震时可能发生岸坡滑动地段的桥梁; (二)、修建于软弱性粘性土层、饱和砂层等可液化土层上的桥梁; (三)、连续梁、T型刚构、大跨径悬臂梁桥; (四)、活动支座、连续梁和大跨径桥梁的固定支座、吊桥的索鞍等易倒易倾易滑
The Code for Earthquake-resistant Design of Highway Engineering was compiled before the second major earthquake in Tangshan-Fengnan and South Liaoning. These two large earthquakes provided us with a wealth of information on earthquake damage, which made our knowledge of earthquake damage greatly Have taken a step forward and none of these new understandings have been reflected in this code. Here is based on the provisions of “Code for Highway Engineering Design” and through the Liaonan, Tangshan - Fengnan earthquake damage summed up the following general provisions: First, the starting point of seismic fortification is generally 8 degrees, but the following bridges and The starting point of the fortification at the bridge part is 7 degrees: (1) A bridge that may have slipped along the shore slope during an earthquake; (2) A bridge constructed on a liquefiable soil layer such as a weakly cohesive soil layer or a saturated sand layer; (C), continuous beam, T-shaped rigid frame, large-span cantilever beam bridge; (D), movable bearings, continuous beams and long-span bridges fixed bearings,