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在公路工程抗震设计规范(简称抗规)中关于单孔拱桥的抗震计算,只给出了地震荷载的大小,而没有直接给出地震内力。由地震荷载去计算地震内力,在无水平荷载作用下的内力影响线计算用表的情况下,不仅极为困难,而且其计算工作量很大,致使一些基层单位很难应用。为此我们根据抗规的规定,用电子计算机直接给出了基本周期和地震内力的计算用表,并附计算实例以供生产部门采用。
Seismic design of highway engineering (referred to as the anti-regulation) on the single-hole arch bridge seismic calculation, only gives the size of the seismic load, but not directly given the seismic internal forces. It is not only extremely difficult but also very computationally intensive to calculate the seismic internal force by seismic load. It is difficult to apply some grass-roots units. To this end, according to anti-regulatory rules, we use the computer directly to calculate the basic cycle and seismic force calculation table, with examples for calculation by the production department.