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I.前言在毛主席关于“认真搞好斗、批、改”,“改革不合理的规章制度”的教导下,我桥规改革战斗组曾于1969年年底提出了“对改革‘桥涵设计规范’的几点初步意见”的报告,我们认为在今后桥梁设计的计算理论方面逐步采用极限状态法是适宜的。同时,我们也初步制定了我国铁路桥梁竖向活荷载系数和我国铁路桥梁混凝土材料强度系数。这为我们按极限状态法设计桥梁提供了一定的条件。为了进一步进行探讨,本着反复实践反复认识的精神,1970年我们曾对跨度为16米和2.4米的普通钢筋混凝土梁按极限状态法进行了试探性设计,并对跨度为2.4米的钢筋混凝土梁进行了试验。我们选用跨度为16米和2.4米的钢筋混凝
I. Foreword Under the guidance of Chairman Mao’s teachings on “conscientiously fighting, criticizing and reforming” and “reforming unreasonable rules and regulations”, the bridge deck reform and reform group proposed in the late 1969 the “code of conduct for the reform” ’Some Preliminary Opinions’ report, we think it is appropriate to gradually adopt the limit state approach in the future calculation of bridge design. At the same time, we have also initially formulated the vertical live load factor of railway bridges in China and the strength coefficient of concrete materials for railway bridges in our country. This provides some conditions for us to design the bridge according to the limit state method. In order to further explore, in the spirit of repeated practice of repeated understanding, in 1970 we had the span of 16 meters and 2.4 meters of ordinary reinforced concrete beams by the limit state method tentative design, and the span of 2.4 meters of reinforced concrete The beam was tested. We use a span of 16 meters and 2.4 meters of reinforced concrete