Introducing CentresKALC
Your ally for crafting lateral systems for buildings, coupled with lightning-speed validation of your computations. CentresKALC is a powerhouse that effortlessly handles the mathematics behind pinpointing centers of mass and rigidity. It also calculates the shearing forces exerted on walls and cores.

In a realm where such calculations might be as rare as finding a hidden gem, CentresKALC steps in as your guiding light. No more relying on intuition alone or simply accepting the status quo of torsion.

access here:
https://lnkd.in/gYmRe6H7

Hi everyone,

Take a look at this handy tool for common beam formulae, essential for all of us who design structural schemes and validate software results
https://rkalc.net/Analysis/CommonBeams

G'day everyone,

Take a look at our Beam Calculator within the ConcreteKALC applications. It's everything you need to design reinforced concrete beams for flexure, shear, and deflection according to AS3600-2018 standards.

We've recently updated the application to include serviceability checks such as stress calculations, cracked inertia, and cracked width. It's all conveniently accessible on one webpage, presented in an easy-to-follow format. You can store it under your projects in the RKALC's Cloud Storage, allowing you to access your KALCs from anywhere, whether you're working from home, at the office, or on the go with your mobile device.
Happy Calculations!

The Tale of Two Building Developers:
Navigating Urban Landscapes Through Architecture and Structural Engineering
---------
The architecture is the story of space and time, it is about fashion, colors, natural light, and nice views. It is also about a fresh breath of green and positive interfacing with the community, all of which pour in pride of owning an apartment in a landmark building.
On the other hand, structural engineering is the language of architecture; it is the words or vocabulary through which architecture is written. Some of this "vocabulary" is quite eloquent and makes a powerful impact, as seen in the Sydney Opera House here in Sydney, or the Burj Dubai. Others stumble, like those rectangular apartment buildings we see everywhere, the majority of which are designed by nothing but greed. I am not quite sure if there is ever architecture in those other than complying dimensions or sometimes performance solutions. I only see rectangles stacking next to each other, above each other, to form giant rectangles, or sometimes trapezoids when the land has such shape.
Let us face it, there is a huge need to grow, and a great demand by our communities to expand and aspire. At the same time, we live in a world of limited resources and increasing awareness of human's footprint on the environment and nature. That said, can we not agree on common grounds? And when I say "we," I mean us in the built environment, the architects with the developers at their back, and the structural engineers, the deliverers of the whole vision.

Developer A & Developer B

Let us say we have Developer A, who instructed the architect to design a building to have, say, 100 apartments, a mixture of 1 bedders and 2. The developer's motive is to achieve meaningful feasibility of their project after buying land for many million dollars, in an area that sells at $10,000 per square meter. The construction cost nowadays is anywhere between $25 and $60 hundred ....
continue here
https://rkalc.net/main/rkalcblog

To Double Curvature or Not?

Clause 10.3.1 of the Australian Standard AS3600-2018 includes a very interesting stipulation on columns in relation to the ratio of M1/M2. This applies to normal columns found throughout the building height, which are typically subject to double curvature behaviors.

According to the Standard, if the analysis moment is less than the minimum eccentricity moment about the respective direction or 5%DN*, the ratio above should be taken as negative. This means the column should be assumed to be subject to single curvature, making it more conservative due to the high moment magnifier (δb).

The logic behind this stipulation is that there may be inaccuracies or errors during installation or due to pattern loading. As a result, the column might experience single curvature loading or "snap through to single curvature mode," as stated in AS3600. Therefore, the analysis assuming double curvature moments would be overwritten by the opposite minimum eccentricity moment.

You might think that increasing the analysis moment above the minimum would result in less conservatism, which is bizarre! However, there is a slight problem with this logic. If there are out-of-position issues, the column would most likely remain subject to single curvature mode, regardless of the analysis moment. This is because an increase in axial load due to construction tolerances or severe pattern loading will induce single curvature.

For those who follow the letter of the Standard rather than its spirit, it is always advisable to have the ratio negative. However, if you can justify it by rationalising the moments from analysis to capture pattern loading or out-of-position scenarios, you may consider otherwise. Ultimately, the judgment is left to your discretion.

Visit our very popular and free Column Calculator in following link, we have added saving and opening files to the webapp to save time of re-entering parameters.


from the RKALC blog

https://rkalc.net/main/rkalcblog

Hi everyone,

The STM calculator of RKALC is one of our most popular apps, perhaps one of the very few web apps out there that can undertake strut and tie calculations in no time, with visual presentation.
It draws the wall elevation together with node capacity checks and strut bursting verifications.

Once this task was daunting and very time-consuming, but not anymore with STMKalc. Iteration has become fun and meaningful.
The video in the link below demonstrates how to use the software, including considerations for iterating through truss depth, concrete materials, and reinforcement geometry.


Access the program here: (free registration)
https://rkalc.net/stmwall/

Good day folks,
Check out our Tributary Area tool, the TribKALC. Lightning-fast web app that takes 2~3 minutes to analyse a full floor plate. It calculates the loads for liquidated KPA and n floors.
This can be particularly important when undertaking conceptual scheme designs or verifying software loads, be it accumulated column loads or transfer slab checks. See this video:.


Access the webapp here https://rkalc.net/tribkalc/Default

Q5 of the RKALC Quiz. look at this flexible bar that bends nicely and bounces back to flat. which is the correct set of reactions?

note that a question like this won't really need software that does large deflection / deformation analysis.

Q7 of the RKALC Quiz, pick the correct strut and tie model?

use our sketchplain button to draw quick sketches for explaining your point /post

Hey folks, look at our Q&A page, there you can ask questions and answer some to help others.

https://rkalc.net/social/QuestionDetail?QuestionID=42 The question is about the application of software, CSI Safe, in relation to feeding the program with the inputs necessary for long term deflection

Welcome to our social media space!

This is dedicated to structural engineers who want to share ideas, ask questions, debate, and make connections.

Once you've followed a user, you'll see their posts on this screen. You can adjust the privacy of your posts by clicking on the three-dot icon in the top right corner.

Also, to ensure that the members posting here are structural engineers or at least interested in the profession (including students, experienced professionals, and others), users must take the quiz at this link before posting : https://rkalc.net/social/quiz