Hello,
There are many colleges in Chennai regarding Structural Engineering.
-CSIR Structural Engineering.
-Agni College of Technology
-Structural Engineering Research College
And many more, go on this site for more details:-

https://engineering.careers360.com/colleges/list-of-civil-and-structural-engineering-colleges-in-chennai

Hello Aspirant
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Top ug btech or structural engineering Colleges in Chennai :
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• IIT Madras
• Anna university
• Satyabama institute of science and technology
• SRM institute of science and technology,kattankulathur
• Madras institute of technology,Chennai
• SSN college of Engineering
• REC- rajalakshmi engineering college
• RMK engineering college
• Saveetha engineering college

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If you have any questions further let me know.
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Thank you!!!