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前言为保证槽形梁的良好运营状态,必须对其施以三向预应力。在三向预应力的作用下,槽形梁的受力状态远较常用的单向予应力桥梁要复杂得多。本文拟根据板壳体系有限单元法理论[3],通过电算对我国第一座预应力槽形梁在顸应力作用下的状态进行初步探讨。首先重点计算单对预应力钢丝束的作用,分析梁体变形、应力状态和三向预加力之间的相互影响,从而对张拉工艺提出建议,然后计算全部预加力的
Preface To ensure the good operating condition of the channel beam, three-way prestressing must be applied. Under the action of three-direction prestressing, the stress state of slotted girder is much more complicated than the commonly used one-way prestressed bridge. In this paper, according to the theory of finite element method of plate and shell system [3], the state of the first prestressed grooved girder in China under the action of 顸 stress is preliminarily discussed through computerized calculation. First of all, focus on calculating the role of a single prestressed steel wire bundle, beam deformation analysis, stress state and three-way pre-force interaction between the proposed tensioning process, and then calculate the total pre-