变截面焊接钢吊车梁疲劳裂缝主要是由于变截面处有很大的应力集中所产生的。
The main form and cause of fatigue failure of steel crane beam are analyzed first, and focused the welded steel crane beam.
而后，在查阅大量文献的基础上，找到了计算连续钢吊车梁整体稳定性的简单方法；
Then, on the basis of extensive literatures, the author finds an easy way to check the elastic stability of continuous steel crane beams.
本文的研究为连续钢吊车梁的设计提供了切实可行的方法，具有一定的理论意义和工程实用价值。
The studies in this paper provide a practical way to design a continuous steel crane beam. It has some theoretical and practical values.
此程序可完成两等跨连续钢吊车梁的设计校核工作，并具有自动绘制内力包络图、输出计算书功能。
This program can complete the designing and checking of a two-span continuous steel crane beam, and it can also draw of internal force envelopes and output the calculation files.
但是，综观国内的钢结构设计软件，只是对简支吊车梁进行设计验算，还没有一款针对连续钢吊车梁的设计软件以满足工程建设的需要。
Currently, the domestic steel design software can only design and check crane beams with simply supported, there is no continuous crane beams software to meet the needs of projections.
在预应力加固设计方面，钢吊车梁与混凝土吊车梁不同，由于其刚度较小、挠度较大，当吊车荷载作用上去后，会引起水平拉杆作用效应增量。
The steel crane girder's rigidity is smaller and its deflection is larger, when the crane moves, there will be force increment in the prestressed horizontal tie.
研究了重型吊车梁用D36低合金高强钢的焊接性。
The paper investigates the weldability of D36 HSLA steel used for heavy crane beams.
在设有大吨位吊车系统的重型厂房中，吊车梁用钢量所占比例较大，对吊车梁的优化设计对工程造价影响很大，大跨多跨重型厂房吊车梁宜采用突缘变截面简支结构。
The weight of steel for crane beam has a great proportion in the total amount consumed in the construction of the heavy-duty plant with large-tonnage cranes.
在设有大吨位吊车系统的重型厂房中，吊车梁用钢量所占比例较大，对吊车梁的优化设计对工程造价影响很大，大跨多跨重型厂房吊车梁宜采用突缘变截面简支结构。
The weight of steel for crane beam has a great proportion in the total amount consumed in the construction of the heavy-duty plant with large-tonnage cranes.
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