Abstract
In order to establish the relation between damage state and member deformation of the L-section RC shear wall, 216 FE models designed to meet the requirements of the Chinese codes were set up. The analysis fully considers the variation of parameters including axial load ratio and shear span ratio etc. According to the results, criteria of classifying failure modes of L-section RC shear walls are proposed. Failure modes are determined by shear-span ratio, moment-shear ratio and end columns' reinforcement ratio. Deformation limits corresponding to respective performance levels are put forward. Fitted formulas of calculating the limits are also presented. It is shown that the categorization criteria are reliably accurate in predicting failure modes. Deformation limits of a given L-section RC shear wall could be determined via axial load ratio and moment-shear ratio. The fitted formulas possess a satisfactory correlation with numerical results.
Highlights
The focus of seismic design has shifted from 'strength' to 'performance' over the last few decades [1]
Some experimental and numerical studies have focused on the walls' seismic performance and the influence of related parameters [10 - 17], studies summarizing the L-section walls' failure modes classification and deformation limits are yet seen
Deformation limits at any performance levels can be acquired based on moment-shear ratio and axial load ratio
Summary
The focus of seismic design has shifted from 'strength' to 'performance' over the last few decades [1]. Such trends of development could only be achieved with the quantitative determination of members' state of damage Immature as it might be, the GB 5001-2010 Code for Seismic Design of Buildings [3] has already recommended the philosophy of performance based design. Ji Jing et al [4] conducted statistical analysis of the rectangular walls experiment data and put forward the formulas of drift angle limits categorized by different failure modes. Some experimental and numerical studies have focused on the walls' seismic performance and the influence of related parameters (axial load ratio, shear span ratio, flange effects etc.) [10 - 17], studies summarizing the L-section walls' failure modes classification and deformation limits are yet seen. Deformation limits at any performance levels can be acquired based on moment-shear ratio and axial load ratio. The study could serve as reference to seismic performance evaluation of L-section RC shear wall
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