前言拱的主要特点在于能充分发挥材料的抗压性能。所以,拱桥的建筑绝大多数采用污工材料。但是,这类材料质地脆,受拉能力差,基础稍有变形就很容易出现开裂现象。因此,过去普遍认为拱桥是不抗震的。1964年我国抗震规范中明文规定“Ⅷ度或Ⅷ度以上的地震区不宜采用石拱桥”。1970 The main feature of the foreword arch is its ability to fully exert the compressive properties of the material. Therefore, most of the construction of arch bridges uses contaminated materials. However, such materials are brittle and have poor tensile strength, and cracking can easily occur when the foundation is slightly deformed. Therefore, in the past, it was generally believed that arch bridges were not earthquake resistant. In 1964, China’s anti-earthquake code stated clearly that “stone arch bridges should not be used in earthquake areas with a degree of VIII or above.” 1970