Nonlinear Analysis of R/C Low-Rise Shear Walls

Abstract

An analysis method for predicting the response of low-rise shear walls under both monotonic and cyclic loading is presented in this paper. The proposed analysis method is based on the softened truss model theory but utilizes newly proposed cyclic constitutive relationships for concrete and steel bars obtained from cyclic shear testing. The successfulness of the analysis method, when combined with new materials constitutive relationships, is checked against the test results of 33 low-rise shear walls reported in the technical literature. The theoretical predictions are compared with the reported test results and are found to be applicable throughout the loading history. The effects of loading types (monotonic versus cyclic) as well as the effects of the boundary elements on the predicted results are also addressed.

Shear strength of squat walls: A strut-and-tie model and closed-form design formula

“…Another interesting observation was that the values of model parameters A, B and C were higher for flanged walls than the corresponding values for rectangular walls, which indicates that a flanged wall has a higher strength than a similar rectangular wall. This may be attributed to the additional confining effect caused by the presence of boundary elements, which reduces the concrete softening effect and limits the cracking and extension of the walls [63].…”

Shear behaviour of high strength concrete walls subjected to cyclic lateral loading

“…The analysis results (Mansour et al 2004) show that the proposed method can predict the cyclic response of RC low rise shear walls with reasonable accuracy. For specimens subjected to monotonic loading, the proposed method predicts more accurately as compared to specimens subjected to cyclic loading.…”

“…Later, it was followed by Mau and Hsu (1986) to simplify the procedure in the preceding work for design purposes. After these two pioneer works, many research have been done to improve the softened truss model for calculating the shear strength of RC walls (Mau and Hsu 1987;Gupta and Rangan 1998;Mansour et al 2004;Kassem and Elsheikh 2010). The basis and development of this model are explained in the following paragraphs.…”

“…Moreover, the details of constitutive laws for concrete and steel bars used in RA-STM can be found elsewhere (Hsu 1996). Mansour et al (2004) used RA-STM with modification in the constitutive laws of materials to do an analytical study of nonlinear response of RC low rise shear walls. They collected data of thirty three RC low rise shear walls failing in web crushing mode available in literature (Galletly 1952;Benjamin and Williams 1957;Hirosawa 1957; Chapter 2: Literature Review Barda et al 1977;Cardenas et al 1980;Ghoneim 1996).…”

“…In this case, the wall web panel was subjected to pure shear Chapter 2: Literature Review and thus the concept of RA-STM could be applied. The details of the analysis procedure can be found elsewhere (Mansour et al 2004).…”