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The Si-Eng
Si's civil engineering blog
All original by Si Shen.
All posts are personal opinions only.
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Creep, stress relaxation and shrinkage
Creep, stress relaxation and shrinkage are different concepts but easily confused
Si Shen
Mar 13, 20232 min read
569 views
0 comments


Plain concrete - how is it different
there is a different set of design rules for plain concrete
Si Shen
Nov 11, 20212 min read
482 views
2 comments


How reinforced concrete degrade
The principle of durability design is to slow down the damage process sufficiently so that the reinforced concrete sustains the damage
Si Shen
Jul 19, 20214 min read
170 views
0 comments


Plastic analysis of reinforced concrete – plastic hinge, moment-curvature and moment-stiffness
Utilising plastic hinges can tap out fuller potential of the structure and achieve an economic design
Si Shen
May 18, 20214 min read
2,208 views
1 comment


Sprayed concrete – what’s special about it?
This post is a study note based on various sources rather than professional advice, and may not be reflective of the most up-to-date...
Si Shen
May 2, 20214 min read
85 views
0 comments


Concrete behaviour in tension (1)
Taking concrete as linear-elastic in both compression and tension is like treating it as metal and can lead to over-dosage of reinforcement.
Si Shen
Mar 25, 20213 min read
1,460 views
0 comments


Disadvantages of large diameter reinforcement
the designer must bear in mind the downside of large diameter reinforcement, which is explained in this blog post.
Si Shen
Jan 10, 20213 min read
533 views
0 comments


Fire engineering for concrete structures
This blog post outlines the overall fire engineering approach and touches on some basic principles.
Si Shen
Dec 27, 20204 min read
201 views
0 comments


Construction quality control and tolerances
The quality control measures put into place are essentially mitigation measures to deal with the risk of failure of compliance to the design
Si Shen
Oct 31, 20202 min read
1,081 views
0 comments


What structural engineers need to know about waterproofing membrane
the membrane is a delicate thing and requires a lot of careful detailing and handling.
Si Shen
Aug 26, 20201 min read
254 views
0 comments


How to specify concrete cover
How to specify concrete cover
Si Shen
Jun 30, 20202 min read
161 views
0 comments


Practical durability design for concrete
summarises how concrete deteriorate in plain language and practical measures to make it durable.
Si Shen
Mar 6, 20202 min read
86 views
0 comments


Reliability
Reliability is the consistency in performance. This is typically a much desired thing generally in life
Si Shen
Jan 28, 20203 min read
40 views
0 comments


Time-dependent behaviour of structures (3) – strength of concrete
Have you ever wondered, why have we chosen 28 days strength as a basis for concrete design? This blog post answers this question and...
Si Shen
Jan 8, 20202 min read
227 views
0 comments


Universal engineering principles
I believe it is essential for engineers to develop the habit of zooming out from their routine designs and re-think at a higher level of...
Si Shen
Dec 14, 20193 min read
210 views
0 comments


Time-dependent behaviour of structures (2) – More on creep and shrinkage?
More details on creep and shrinkage
Si Shen
Dec 3, 20193 min read
147 views
0 comments


Time-dependent behaviour of structures (1) – shrinkage and creep
Creep and shrinkage are two long-term properties of concrete. This blog post help designers gain a deeper understanding of both
Si Shen
Nov 24, 20193 min read
480 views
0 comments


A step-by-step anatomy of concrete stress-strain curve (2)
this one goes on further to touch on the stiffness of concrete and the simplified relationships for cross-sectional design.
Si Shen
Aug 4, 20192 min read
2,671 views
0 comments


A step-by-step anatomy of concrete stress-strain curve (1)
This blog post aims to have a step-by-step anatomy of the stress-strain curve of concrete and clarify every detail and assumption
Si Shen
Jul 18, 20194 min read
11,268 views
0 comments


A journey of designing ‘self-healing’ concrete
All concrete naturally cracks, regardless of whether it is desirable or not, and regardless of measures that you may choose to adopt, in...
Si Shen
May 6, 20194 min read
356 views
0 comments
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