| The raw soil structure has been widely used by researchers from all around the world because of the advantages of convenience,ecological environment,and thermal performance.The construction of villages and towns in China is transforming to economy,resource benefit and flexible diversity.The redevelopment of raw soil construction is not only to give full play to its advantages in thermal insulation,sustainable development,etc.The nature of its natural return is also conformed to the strategic background of China's sustainable development.However,the poor mechanical properties of traditional raw materials make the application of raw materials limited.Therefore,while retaining the advantages of raw soil materials,it is necessary to boldly break through the traditional mode of raw soil structure construction and study the raw soil forming process,structural system,and modification of raw material which can meet the needs of the development of modern villages and towns.The hollow interlocking compressed adobe masonry structure improved by the research group on the basis of existing research abroad is a new type of raw soil block that can be directly used for ramping without mortar bonding.The new type of raw soil block not only can reduce the weight of raw soil structure,but also can be complemented by structural measures to improve the strength and integrity of the structure,and provides the reference for the implementation of assembly type raw soil construction.In this paper,the axial compressive tests of three groups of masonry structure with different height-thickness ratio and two groups masonry specimens are carried out to study the influence of height-thickness ratio on test process,the failure mode and the compressive bearing capacity of interlocking compressed adobe masonry structure.The theoretical calculation formulas for stability coefficient and bearing capacity which are suitable for interlocking compressed adobe masonry structure are proposed,and the results of the theoretical calculation are compared with the experimental results.Simultaneously,the in-plane and out-of-plane deformation performances of the masonry members with different height-thickness ratio are analyzed.The vertical stress strain curves of different height-thickness ratio specimens were studied,and the resistance axial deformation capacity was analyzed.The test results show that the compressive bearing capacity of interlockingcompressed adobe masonry structure decreases linearly with the increase of height-thickness ratio;The theoretical calculation formula for stability coefficient of design specification of masonry structure in china is not applicable to interlocking compressed adobe masonry structure.The calculation formula of the stability coefficient proposed in this paper is in good agreement with the test results.When the height-thickness ratio is less than 9 or greater than12,the formula can be used to calculate the stability coefficient.The calculation formula of the stability coefficient proposed by Shi Chuxian can be used to interlocking compressed adobe masonry structure,and it is suitable for calculating the stability coefficient when the height-thickness ratio is greater than 9;Under the vertical load,the vertical deformation of both sides of the specimen increases with the same amplitude.With the increase of height-thickness ratio,the deformation resistance of masonry components gradually decreases.The test results verifies that the interlocking compressed adobe masonry structure can be applied to practical projects and provide reference for research of the seismic performance and structural measures of interlocking compressed adobe masonry structure. |
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