design slab
TRANSCRIPT
![Page 1: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/1.jpg)
PHÂN TÍCH & THIẾT KẾ HỆ THỐNG SÀN BTCT
• Hệ sàn phẳng - flat plate floor system– chiều dài nhịp = 15-20 ”– chịu tải trọng nhẹ (ví dụ tải trọng căn hộ chung cư)– giá thành rẻ vì chi phí ván khuôn thấp
• Hệ sàn nấm - flat slab floor system– chiều dài nhịp = 20-30 ”– chịu tải trọng lớn hơn sàn phẳng (ví dụ tải trọng
văn phòng làm việc)– sử dụng các tấm pa-nen (drop panel) để giảm ứng
suất cắt (trực tiếp và do mômen gây ra) tại đầu cột
![Page 2: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/2.jpg)
PHÂN TÍCH & THIẾT KẾ HỆ THỐNG SÀN BTCT
• Hệ sàn ô lưới - grid (waffle) slab floor system– chiều dài nhịp = 20-35 ”– chịu tải trọng lớn (ví dụ tải trọng nhà công nghiệp)– độ cứng lớn dẫn đến chuyển vị nhỏ– giá thành đắc tiền vì chi phí ván khuôn cao
• Sàn 2-phương có dầm (khung thông thường)• Sàn 2-phương có dầm nông (band beam)
– Kích thước dầm nông rộng và cạn nhằm hạn chếtối đa chiều cao dầm và cho phép dể dàng qua lại
![Page 3: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/3.jpg)
PHÂN TÍCH & THIẾT KẾ HỆ THỐNG SÀN BTCT
![Page 4: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/4.jpg)
![Page 5: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/5.jpg)
![Page 6: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/6.jpg)
![Page 7: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/7.jpg)
![Page 8: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/8.jpg)
![Page 9: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/9.jpg)
![Page 10: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/10.jpg)
![Page 11: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/11.jpg)
![Page 12: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/12.jpg)
![Page 13: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/13.jpg)
![Page 14: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/14.jpg)
![Page 15: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/15.jpg)
![Page 16: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/16.jpg)
![Page 17: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/17.jpg)
![Page 18: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/18.jpg)
![Page 19: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/19.jpg)
![Page 20: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/20.jpg)
![Page 21: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/21.jpg)
![Page 22: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/22.jpg)
![Page 23: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/23.jpg)
f1
Pc
Pcdh nh
c+P
dhcP
f
f2
f3
f3-f2
f
f1 : Do toaøn boä taûi troïng ngaén haïnf2 : Do taûi troïng daøi haïn taùc duïng ngaén haïnf3 : Do taûi troïng daøi haïn taùc duïng daøi haïn
f=f1-f2+f3
Chuù yù : Caàn xaùc ñònh cho ñuùng vôùi töøng fi
![Page 24: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/24.jpg)
![Page 25: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/25.jpg)
bredb
b
ss
s
AEAE
zhB
0 Abred = ( f + ) bh0
1051
12
0
h
x
1
55,11
5,1
10
51
1
0
20
h
eh
x f
serbRbh
M
,20
![Page 26: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/26.jpg)
![Page 27: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/27.jpg)
![Page 28: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/28.jpg)
![Page 29: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/29.jpg)
TẠI SAO CẦN BỐ TRÍ THÉP TẠI CÁC GÓC (CORNER) ?
Xem bản vẽ S2-16
![Page 30: Design Slab](https://reader033.vdocuments.net/reader033/viewer/2022052123/5571f83349795991698cded7/html5/thumbnails/30.jpg)
TẠI SAO PHẢI BỐ TRÍ DÙM TÍCH HỢP
- Đối với sàn không có drop panel thì phải sử dụng dầmtích hợp nếu lực tác dụng > lực chống cắt của bê tông
- Xem bản vẽ S2-18 của The Manor II