Research On Shear Behaviors Of The New Thermal Insulation Composite Masonry Wall Which Combined With Lightweight Concrete Hollow Blocks And Loam

Xinjiang is located in the cold regions of northwest China, and in the earthquake-prone. Most regins arein the poor natural conditions, rural buildings mostly form the traditional structure such as the adobestructure, wood structure and brick structure. However, these traditional structures have disadvantages inthermal insulation, earthquake-proof and durability. Therefore, a architectural structure system with energyconservation,anti-quake, durability and economy is developed which is positive usefull for corps andsocial development.Demading for rural buildings in Xinjiang, this subject uses lightweight insulation concrete hollow blockand EPS lightened mixed soil, a kind of new energy-saving composite wall structure is combinedeffectively with those two materials-the new thermal insulation composite masonry wall which combinedwith lightweight concrete hollow blocks and loam, that is, perfusing light raw soil material in thelight-weight concrete hollow block hole, taking lightweight concrete hollow block as outside and light rawsoil as internal material, a kind of composite insulation wall is formed. Through a combination of both thedeficiency of both is overcame and advantages of both materials are given full paly to, this structure has agood prospect of application to residential building in XinJiang. Though much fruitful progress has beenachieved in previous research, there still remains a lot of problems and contents of a kind of new wallmaterial to be studied. Based on previous research, the thesis is devoted to studying on composite wall.Aspect ratio (shear span ratio), core grouted strength and vertical stress taken as influencing factors,6piecewall are designed. Experiments and theoretical analysis are employed to study the load-bearingperformance, failure mode, basic seismic performance and formulas to calculate seismic bearing capacity.The main contents and achievements are presented as follows:(1)Based on test research on these6piece new thermal insulation lightweight composite wall, theload-bearing performance, crack formation, failure mode, energy dissipation capability, ductility, bearingcapacity and basic seismic performance have been studied. Influence on earthquake proofing ability ofaspect ratio(shear span ratio), core grouted strength and vertical stress is analyzed and the results show that:the smaller aspect ratio is and the bigger the content of EPS in core is, the greater energy dissipationcapacity is; the smaller aspect ratio is and the larger vertical load is, the bigger the ultimate bearingcapacity.(2) According to the test results, based on the shear mechanism of core grouted block wall, shear bearingcapacity is composed of shear of masonry, shear of inner core, influence of aspect ratio and vertical stress,the formula for calculating shear bearing capacity has been deduced. results from calculation andexperiments are in good agreement. And based on the flexural mechanism, the formula for calculatingflexural bearing capacity has been given, flexural capacity of each flexural wall is calculated.