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编者按:本刊1982年第4期上刊载了武诚忠同志的《装配式钢筋混凝土斜腿连续箱梁桥设计简介》一文,引起了一些读者的兴趣,认为在水网区该种桥梁结构具有较好的经济技术效果。宣道光同志对该文结构计算部分的设计假定(1)“本设计为一弹性支承连续梁,不论荷载加于梁的任何范围内,作用于B、C两支承点的反力恒相等”提出商榷意见,认为原文中V_B=V_C影响线没有引进弹性支承的柔性系数,导得的结果与刚性支承完全一致;同时从结构直观上或理论推导都证明V_B=V_C的假定与构件的受力情况不尽相符,故认为上述假定不能成立。来稿还对加强结构的整体性、稳定性提出了建议。原作者充分考虑了读者的正确意见,作了认真、负责的答复,写出了(《再论斜腿连续箱梁桥结构计算方法》一文,进一步探讨按弹性支承进行内力计算的方法。为了贯彻‘双百’方针,活跃学术讨论空气,本刊将两篇文章同时发表。
Editor’s Note: The fourth issue in 1982, No. 4, published Comrade Wu Chengzhong “Assembly of reinforced concrete slant legs continuous box girder bridge design” one article, has aroused the interest of some readers, that in the water network area of the bridge structure has more Good economic and technological results. Design Proposal for Structural Calculation Section of Visionary Doctrine (1) “Proposed design of a continuous beam with elastic support, no matter what the load is added to any range of the beam, the reactionary constant force acting on the support points B and C” It is considered that the V_B = V_C influence line does not introduce the flexibility coefficient of elastic support, and the result is consistent with that of rigid support. At the same time, both the assumption of V_B = V_C and the force condition of component Do not match, so that the above assumption can not be established. The manuscript also made suggestions on how to strengthen the integrity and stability of the structure. The original author gave full consideration to the reader’s correct opinions and made a serious and responsible reply and wrote out the article “Revisiting the Calculation Method of Skew Leg Continuous Box Girder Bridge Structure” to further discuss the method of calculating internal forces according to elastic support.In order to implement ’Double hundred’ policy, active academic discussion of the air, the two articles will be published at the same time.