Masonry Structure Vertical And Horizontal Wall Load Of Difference Between The Top-level Crack

Masonry bui1ding has been the main structura1 sty1e of living bui1ding inour Chinese cities and towns. But cracks are formed easi1y because of the poortensi1e resistance of the masonry bui1dings, especial1y on the top of the tierbui1dings where ob1ique cracks are often deve1oped. These have been the urgent1yhard problems of civi 1 engineering researchers.First1y, in this paper, the testes about tensi1e resistance of masonrycomponents in different period are processed and re1ated suppositions andformu1as are brought forward: the formu1a about maxima1 shear stress of top sidein high or tier masonry bui1dings is deduced. It can be found easi1y that thefactors affect ing the maxima1 shear stress are vertica1 resi stance coefficient \1oad magnitude \ wa11 geometry dimensions and its modu1us of e1asticity.According to the re1ated suppositions and formu1as, the experiments about theeffects of 1oad difference between vertica1 and horizontal masonry wa11s to topcracks are Drocessed. The resu1ts of these tests and experiments not on1y confirmthe correctness of the forma1 theories but a1so provide a more direct understandof the top cracks in high or tier masonry bui1dings for the reason of 1oaddifference between vertica1 and horizonta1 wa11s.Then the formu1a of computing the maxima1 top shear stress in designingmasonry bui1dings and the method of checking computations of cracks are broughtforward in this paper on the basis of the theoretica1 deduce and the data ofthese tests and experiments. A1so, the practica1 construct methods and therequirements of preventing such cracks in the aspects of the construct rate.the strength and modulus of e1asticity of the masonry bui1dings are put forward...