三峡永久船闸下游泄水分岔管的应力分析

Experimental Stress Analysis for Bifurcated Pipe Structure of TGP Lock Emptying Culvert

三峡永久船闸泄水分岔管是钢筋混凝土框架式结构。为求取其在各种复杂荷载作用下结构的应力状态，采用了光弹实验方法，以三个各具特色的基本实验与理论分析得出的成果，叠加组合得到实际存在的不同工况下的应力。研究结果指出：运行工况下，分岔管应力比较复杂，同一荷载条件下，其各部分的孔口应力有不同的表现形态；检修工况下的应力状态更复杂，数值也更大。

The bifurcated pipe of the TGP lock emptying culvert is a reinforced concrete framed strcture. For obtaining structure stress distributions under the action of different loads, the photoelastic experiment method is adopted. The stresses in the framed structure under three typical condition are obtained through individual basis experiments and theoretical analysis, and, at last, by superposition method the whole actually existing stresses may be found. The research results indicate that under normal operating condition the stresses of the bifurcated pipe are rather complicated. For same load the stress distribution around holes at various sections of the frame are not the same. The stresses under inspection condition are even more complicated and their values still greater.