## 1 Introduction
In comparison, [PERSON] and [PERSON] worked out the failure mechanism of the masonry wall structure under shear loading and analyzed the influence of stress changes in the vertical direction on the shear strength of the wall [8]. [PERSON] and [PERSON] put a full-scale masonry wall of grouted concrete under vertical stress and imposed loading from the side. They believed that as the longitudinal re-bar(s) yields, vertical loading has a small part to play in terms of displacement limit change at the top [9]. [PERSON] and [PERSON] carried out experimental studies on the seismic performance of a reinforced masonry block wall with a constraint design. They noticed that the constraint structure helps to mitigate the cracking, which in turn enhances the seismic resistance of the wall [10]. [PERSON] _et al._ performed cyclic dynamic tests on three pieces of reinforced block shear wall with different height-to-length ratios and various reinforcement ratios. By doing so, they noticed that the specimen promises fairly good performance with respect to energy consumption; at the same time, a greater reinforcement ratio in the vertical direction helps to undermine stiffness degradation and build up the deformative capacity of the structure [11]. In a comparative study of the exterior insulation of different wall structures, _i.e._, concrete blocks, cement blocks, bricks, _etc._, Oak Ridge National Laboratory noticed that the concrete-block specimen excels in this category [12]. [PERSON] and [PERSON] focused on the influence of eccentricity on the force-bearing performance of a masonry structure with autoclaved fly-ash bricks. Their works showed that the force-bearing performance linearly declines with increasing eccentricity [13]. The experimental research on the compressive resistance of the masonry structure with recycled-concrete bricks, carried out by [PERSON] showed that compared with its clay-brick counterpart, the structure falls short with respect to force-bearing performance and its compressive strength deteriorates in a fairly quick manner. However, note that greater mortar strength drives up the force-bearing and deformative capacities of the structure [14]. [PERSON] _et al._ considered the seismic performance of a low masonry structure constraint by using stem-type structural columns as the focus and determined that the columns, compared with their cast-_in-situ_ counterparts, contribute to better seismic resistance of the overall masonry structure [15]. With the help of a vibration test rig, [PERSON] _et al._ managed to test the masonry-steel frame wall structure used in the Beauharnois Generating Station in Montreal, Canada. The results indicated that the interaction between the steel frame and wall is a cooperative one, as major vibration only results in local cracks and some displacement at the joint of the brick wall and the steel frame [16]. Therefore, it can be said that the research endeavors in this field, that is, the basic mechanical performance of wall structures, mainly focus on the study of those made of one single wall material or the integration of different materials; however, the mechanical performance of the integrated wall structure that embodies both thermal insulation and force bearing seems to be overlooked. In other words, it is the major concern and pressing challenge of researchers and engineers at large to put forward wall structures and resource-efficient housing designs to fill in this gap. This paper, giving full consideration to the wall structure and the material applied, proposes an integrated wall structure of a brick-stem-insulating layer, with the wall being the member for both thermal insulation and force bearing. The structure opens up new dimensions in the following fields: (1) The manufacture of recycled bricks and fly ash blocks facilitates the green effort, as construction and industrial wastes are recycled for the preparation of recycled concrete aggregate and fly ash.