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在1987年修订的《公路工程抗震设计规范》(以下简称“公震规”)中增添了等跨连拱桥抗震验算的内容(见条文4.2.15、4.2.16、4.2.17)。另外,在附录五中又提供了直接计算拱顶、1/4点和拱脚截面的地震内力反应的“拱桥内力系数表”。为方便桥梁设计工作者应用这些条文和系数进行连拱桥抗震验算,本文提供了一个计算示例,供有关人员参考。
In 1987, the “Code for Aseismic Design of Highway Engineering” (hereinafter referred to as “Earthquake Regulations”) added the content of seismic checking of spanned arch bridges (see provisions 4.2.15, 4.2.16, 4.2.17). In addition, Appendix 5 also provides the “arch bridge internal force coefficient table” that directly calculates the seismic internal force response of the vault, 1/4 point and arch section. In order to facilitate the bridge design workers to apply these provisions and coefficients to the seismic checking of arch bridges, this article provides a calculation example for reference of relevant personnel.