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DP型烧结多孔黏土砖的孔型和孔洞率相比普通多孔砖有所变化,为研究对应砌体的力学性能与变形指标,对DP型烧结多孔黏土砖砌体进行了受压和受剪试验,根据试验结果分析了该类砌体受压、受剪的破坏机理和破坏特征。结果表明,大开孔率烧结多孔黏土砖砌体受压破坏时沿竖向形成上下通缝,开孔率较大的DP1型烧结多孔砖砌体的抗压强度比开孔率较小的DP2型烧结多孔黏土砖砌体的低,且变异系数大;砌体破坏形式包括单剪破坏、双剪破坏和砖块压坏三种,DP1型烧结多孔砖砌体抗剪强度比DP2型烧结多孔黏土砖砌体的高。采用最小二乘法对规范公式进行修正,建立了DP型烧结多孔黏土砖砌体抗压和抗剪强度平均值的计算式,计算结果与试验结果吻合较好。计算得到DP型烧结多孔黏土砖砌体抗压和抗剪强度设计值,并根据已有受压本构模型,建立了该类砖砌体受压应力-应变关系式和弹性模量计算式,计算值与试验结果吻合较好。
DP-type sintered porous clay brick hole and hole ratio compared to ordinary porous brick has changed, in order to study the corresponding mechanical properties of masonry and deformation indicators of the DP sintered porous clay brick was subjected to compression and shear tests According to the test results, the failure mechanism and failure characteristics of such masonry were analyzed. The results show that the DP1-type sintered porous brick masonry with large opening ratio is larger than the DP2 with smaller opening ratio when the large opening sintered porous clay brick masonry is under the pressure failure. Type sintered porous brick masonry is low and the coefficient of variation is large. The failure modes of masonry include single shear failure, double shear failure and brick crushing. The shear strength of DP1 sintered porous brick masonry is lower than that of DP2 sintered porous Clay brick high. The least square method was used to correct the standard formula, and the formula of the average compressive strength and shear strength of DP sintered brick was established. The calculation results are in good agreement with the experimental results. The design values of compressive strength and shear strength of DP-type sintered porous clay brick masonry are calculated. According to the existing compressive constitutive model, the compressive stress-strain relation formula and elastic modulus formula are established. The calculated values agree well with the experimental results.