Analysis And Calculation For Peak Shear Strength Of Shear Walls With Boundary Elements

Reinforced concrete walls are common in practice because they could provide much or all of a structure’s lateral strength and stiffness.Squat walls are generally grouped by plan geometry,namely,rectangular,barbell,and flanged.The reinforced concrete walls with boundary elements(barbells or flanges)have higher shear strength and stiffness than that with rectangular cross sections,so they are widely used in conventional buildings.Chinese code provisions for seismic design of reinforced concrete walls were drafted primarily for the walls with rectangular cross sections and did not consider the influence of boundary elements.Improved empirical equations are developed for peak shear strength for the walls with boundary elements in a format suitable for inclusion in codes of practice.A database of information from tests of reinforced concrete walls is assembled with the objective of proving the advantages of boundary elements.Owing to the limit test data,reinforced concrete walls are modeled using finite element code:VecTor2.VecTor2 is used to predict the cyclic response of the walls with rectangular cross sections and boundary elements,and the results show that VecTor2 is a effective code to predict the peak shear strength of the walls with rectangular cross sections,barbell,and flanged.Modeling decisions that are critical to predicting response are explored.The results show that the peak shear strength of walls increase with increasing area and Longitudinal reinforcement of boundary elements.Improved empirical equations are developed for peak shear strength for the walls with boundary elements by taking use of the data from tests and finite element code.And it is suitable for inclusion in standards and codes of practice.There are three innovative points:(1)A database of information from tests of reinforced concrete walls is assembled with the objective of proving the advantages of boundary elements.(2)VecTor2 is used to predict the cyclic response of the walls with rectangular cross sections and boundary elements,the results show that the peak shear strength of walls increase with increasing area and Longitudinal reinforcement of boundary elements.(3)Improved empirical equations are developed for peak shear strength for the walls with boundary elements by taking use of the data from tests and finite element code.