Autoclaved aerated concrete (AAC) block masonry has been widely used for bearing walls of multi-story buildings or non-bearing walls of high-rise buildings because of its unique advantages, such as lightweight, low pollution output, and excellent thermal insulation performance. However, traditional AAC block masonry has the disadvantages of high water absorption, poor adhesion to mortar, and low construction efficiency. In order to improve the performance of traditional AAC masonry, this paper proposed a new kind of mortar-free AAC block masonry with concrete core-columns. Fundamental mechanical properties of compression and shear were studied. We divided a total of 16 compression specimens into four groups according to different hollow ratios and strength grades of the block, and eight shear specimens into two groups based on different hollow ratios. Each specimen consists of three-layer blocks with two core columns at the point of quadri-section. The diameters of columns were, respectively, 100 mm and 80 mm. The specimens were loaded at a constant speed to evaluate their bearing capacity, displacement response, crack development, and damage state. The formula of the average values and design values of the compressive and shear strength of masonry were obtained statistically. The stress–strain constitutive relation of masonry expressed by a three-stage curve was presented. Furthermore, the result of numerical analysis using the ABAQUS finite element program aligned well with the experimental results. The compressive strength and shear strength of the new type of masonry are no less than traditional AAC masonry, and new masonry has higher construction efficiency and more stable strength.

蒸压加气混凝土砌块砌体由于其独特的优点，如重量轻，污染少，隔热性能好，已被广泛用于多层建筑物的承重墙或高层建筑的非承重墙。但是，传统的AAC砌块砌体具有吸水率高，对砂浆的附着力差，施工效率低的缺点。为了提高传统AAC砌体的性能，本文提出了一种新型的无砂浆混凝土芯柱的AAC砌体。研究了压缩和剪切的基本力学性能。我们根据砌块的空心率和强度等级将总共16个压缩试样分为四组，根据中空比的不同，将八个剪切试样分为两组。每个样本由三层块组成，在四边形的点上有两个核心柱。柱的直径分别为100mm和80mm。样品以恒定速度加载，以评估其承载力，位移响应，裂纹发展和损坏状态。统计得到砌体的抗压强度和抗剪强度的平均值和设计值的公式。提出了用三段曲线表示的砌体应力-应变本构关系。此外，使用ABAQUS有限元程序进行的数值分析结果与实验结果吻合良好。新型砌体的抗压强度和抗剪强度不亚于传统的AAC砌体，