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宝钢炼钢区辅厂房第一、第二脱正模车间由于生产工艺要求个别柱距为40米,为此设计采用自重145吨、40米长的桁架,由于桁架二侧自重不同,因此桁架重心不在中心,虽然设计时已考虑八个吊点,由于桁架较重、重心又偏等因素,主付吊束分别选择了不同规格,但吊束仍然都很粗,为了确保合理的安全度又要操作方便,还需考虑效益,因此立体吊束受力如何计算、不均匀系数怎样考虑等问题值得研究。现就有关不对称立体吊束受力並结合一脱车间的40米桁架实例进行计算比较,同时提出一些个人的见解供参考。
Due to the production process requires individual column spacing of 40 meters, for the first and second moldless workshop of Baosteel Steelmaking Plant, the truss with its own weight of 145 tons and 40 meters is designed. Due to the different self-weights on both sides of the truss, the truss center of gravity Not in the center, although eight lifting points have been considered in the design, due to the heavy truss, center of gravity and other factors, the main beam and the beam are different specifications, but the beam is still very rough, in order to ensure reasonable safety but also Easy to operate, but also need to consider the benefits, so how to calculate the force of three-dimensional suspension beam, how to consider the uneven coefficient and other issues worthy of study. Now on the asymmetric three-dimensional beam binding force combined with a 40-meter truss shop off the case of comparison, at the same time put forward some personal views for reference.