Monotonic and Cyclic Seismic Analyses of Old-Type RC Columns with Short Lap Splices
Round 1
Reviewer 1 Report
Comments and Suggestions for Authors
With the emergence of resilient disaster prevention concepts, resilient structural design has become a focus of attention, and columns or structural types with Short Lap Splices, known as resilient structures, have become a current research hotspot. How to simulate the seismic performance of short Lap Splices columns is of great significance. This study is very interesting and has good engineering application value. If the authors want to revise this manuscript, it is recommended that they consider the following points:
Main issues:
-How to verify the correctness and rationality of the numerical simulation in this manuscript, without comparing experimental and numerical simulation results?
-How to evaluate the seismic performance of columns with Short Lap Splices without considering seismic acceleration time history excitation and only simulating their mechanical characteristics under quasi-static action, without obtaining nonlinear dynamic response based on nonlinear dynamic time history analysis?
Minor issue:
-The conclusion section is too general and vague, and does not reflect the findings and value of this study.
-In this manuscript, some images are not clear enough, such as Figure 2. It is recommended that the authors provide clear images.
Author Response
Please see the attachment.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
Comments and Suggestions for Authors
The submitted article needs revision.
For the details see the attached file.
Comments for author File: Comments.pdf
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Reviewer 3 Report
Comments and Suggestions for Authors
Reinforced concrete (RC) columns built in the early 1970s or earlier frequently exhibit low seismic strength and ductility, owing to the presence of short lap splices. These splices, which are inadequately confined and located just above the foundation level, are especially susceptible to high inelastic demands during seismic events.
This study describes a numerical model for estimating the lateral strength and deformation of RC columns with short lap splices. The model is based on local bond-slip analytical frameworks derived from isolated anchored bars, with closed-form solutions of bond differential equations. Correlation with experimental data from cyclic loading tests on RC columns with deficient lap splices confirms the proposed model's effectiveness.
Results indicate strong alignment between the predicted strength of short lap splices, failure modes, and the lateral resistance and deformation of columns, across both monotonic and cyclic seismic analyses.
Some remarks that could be taken in consideration in order to improve it:
- First of all the metodology has too much similitude with literature. Should be reconsidered.
- highlight the advandates/disadvantages of this approach;
- to make calculations feasible, the model most likely makes certain assumptions and simplifies them. These assumptions may not fully account for the complex behavior of RC columns during seismic events, resulting in inaccurate predictions.
- The model can be created based on specific RC column types and loading conditions. Its applicability to various column configurations, materials, and seismic intensities may be limited.
- this may be primarily concerned with static or quasi-static behavior, failing to account for dynamic effects such as inertial forces, damping, or pounding between adjacent structural elements during seismic events.
- not many recent references.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Round 2
Reviewer 3 Report
Comments and Suggestions for Authors
Article looks improved!
