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一、说明在我国近期的水利水电工程建设中,经常遇到具有软弱夹层或地质构造复杂的基础。为了在光弹性模型上模拟各种不均匀基础对上部混凝土建筑物应力的影响,许多光测实验室用不同弹性模量的光弹性材料研制加工成部件,用粘胶胶结成组合模型,供测试使用。由于各种材料的热膨胀系数不相同,组合模型在应力冻结过程中,在胶结的界面上热膨胀变形相互约束,将产生额外的温度约束应力。在约束应力影响范围内。荷载产生的应力光图被干扰,不能得到所需要的
I. Description In the recent construction of water conservancy and hydropower projects in our country, we often encounter complex foundations with weak interlayers or geological structures. In order to simulate the influence of various non-uniform foundations on the stress of the upper concrete buildings on the photoelastic model, many photometric laboratories developed and processed the parts using photoelastic materials with different elastic moduli, and they were glued together to form a combination model. Test use. Since the coefficients of thermal expansion of various materials are not the same, the thermal expansion of the combined model at the interface of the cement in the stress freezing process is mutually constrained, and additional temperature constrained stress will be generated. Within the constraint stress range. The stress light pattern produced by the load is disturbed and cannot be obtained