Week 3 Challenge

1.1

• DEAD LOAD
• LIVE LOAD
• WIND LOAD
• EARTHQUAKE LOAD

1.2

• THE RATIO OF LONGER SPAN AND SHORTER SPAN IS GREATER THAN 2 IS CALLED ONE WAY SLAB
• WHERE Ly/Lx >2.
• WHERE LOAD ACTING ON TWO DIRECTION IN A SLAB IS CALLED ONE WAY SLAB.

1.3

• UNIT WEIGHT OF STRUCTURAL STELL IS 7840 Kg/m³
• UNIT WEIGHT OF SOIL IS 18 KN/m³

1.4

• CIRCULAR
• RECTANGLE
• TEE
• TRAPEZODIAL
• GENERAL

1.5

• PRIMARY BEAM MEANS RADIATION WHICH PASESS THROUGH AN APERTURE OF THE SOURCE HOUSING BY A DIRECT PATH FROM THE X-RAY TUBE OR A RADIOACTIVE SOURCE LOCATED IN THE RADIATION SOURCE HOUSING.

2.1

• K1 = PROBABILITY FACTOR
• K2 = TERRAIN,HEIGHT AND STRUCTURE SIZE
• K3 = TOPOGRHAPY FACTOR
• DESIGN WIND PRESSURE :- THE DESIGN OF WIND PRESSURE AT ANY HEIGHT ABOVE MEAN GROUND LEVEL SHALL BE OBTAINED BY THE FOLLOWING RELATIONSHIP BETWEEN WIND PRESSURE AND WIND VELOCITY.
• Pz = 0.6Vz²

2.2

• SLAB
• SECONDARY BEAM
• PRIMARY BEAM
• COLUMN
• FOUNDATION

3.1

ONE WAY SLAB

• THE RATIO OF LONGER SPAN AND SHORTER SPAN IS GREATER THAN 2 IS CALLED ONE WAY SLAB
• WHERE Ly/Lx >2.
• WHERE LOAD ACTING ON TWO DIRECTION IN A SLAB IS CALLED ONE WAY SLAB.

TWO WAY SLAB

• THE RATIO OF LONGER SPAN AND SHORTER SPAN IS LESS THAN OREQUAL TO 2 IS CALLED TWO WAY SLAB
• WHERE Ly/Lx <
• WHERE LOAD ACTING ON FOUR DIRECTION IN A SLAB IS CALLED TWO WAY SLAB.

3.2

• THE SECOND BEAMS ARE PRIMARLY CONNECTED TO THE PRIMARY BEAMS MAINLY SIMPLY SUPPORTED BEAMS.
• THE SECONDARY BEAMS ARE PROVIDED FO THE BETTER DISTRIBUTION OF SLAB LOADS ALONG WITH PRIMARY BEAMS WHICH RESETS ON THEN SLABS.
• MAINLY SECONDARY BVEAMS ARE CONNECTED WITH PRIMARY BEAMS AND THAT PRIMARY BEAMS ARE DIRECTLY CONNECTED WITH COLUMNS.
• IN SECONDARY BEAMS IMPORTANT TO RELEASE THE END MOMENT AT THE SUPPORTS,BECAUSE OF THIS ALL THE SECONDARY BEAMS ARE PROVIDED WITH THE PINNED CONNECTION.

3.3

a.

• DEAD LOAD : IS 875 PART 1
• LIVE LOAD : IS 875 PART 2
• WIND LOAD : IS 875 PART 3
• SEISMIC LOAD : 13927

b.

• DEAD LOAD DEPENDS UPON UNIT WEIGHT.
• VOLUME OF RECTANGULAR/CIRCULAR SECTION.
• LIVE LOAD DEPENDS UPON BUILDING TYPE.
• AREA OF TYPE OF ROOM.

c.

• A LOAD IS A COMBINATION OF DIFFERENT TYPES OF LOADS WITH SAFETY FACTORS APPLIED TO THEM.
• A STRUCTURE IS CHECKED FOR STRENGTH AND SERVICEABILITY AGAINST ALL THE LOAD CASES IT IS LIKELY TO EXPERIENCE DURING ITS LIFETIME.

3.4

PROPERTIES

• FOR ASSIGNING THE PROPERTIES GO TO THE PROPERTIES IN THAT A OPTION CALLED DEFINE.

• BY CLICKING THAT THE DAILOUGE BOX WILL BE OPENED LIKE THIS.

• IN THAT WE HAVE TO CHOOSE TYPE OF PROPERTY AND ASSIGNED IT TO MODEL.

SUPPORTS

• FOR ASSIGNING THE SUPPORTS GO TO THE SUPPORTS IN THAT CREATE OPTION IS THERE.

• BY CLICKING THAT OPTION THIS DAILOUGE BOX WILL APPEARS.

• AFTER THAT WE CAN CHOOSE THE TYPE OF SUPPORT ANS ASSIGNED IT TO THE MODEL.

3.5

• USING NODES CREATE A MODEL IN THE STTAD.PRO SOFTWARE

• SELECT ANY ONE BEAM FROM THE MODEL.
• GO TO THE INSERT NODE OPTION BY SELECTING THAT A DAILOUGE BOX WILL APPEARS LIKE THIS

• IN THE SELECT THE ADD MIDPOINT OPTION IT WILL ADDED AUTOMATICALLY.

• PRESS OK THE NODE WILL BE CREATED.

• DO IT AGAIN FOR THE OPPOSITE BEAM ALSO.
• THEN USING ADD BEAM OPTION ADD THE TWO NODES WHICH WE CREATE PREVIOUSLY THE SECONDARY BEAM IS CREATED LIKE THIS.

PRACTICAL

1

AIM:- CALCULATE THE WIND PRESSURE FOR THE GIVING BUILDING.

GIVEN DATA:-

BUILDING DIMENSION : 20M X 30M X 20M HEIGHT RCC.

BUILDING USAGE : HOSPITAL BLOCK IN CITY CENTRE

LOCATION : DARJEELING.

PROCEDURE :-

• FIRST WE CALCULATE THE DESIGN WIND SPEED(Vz).
• WE KNOW THE FORMULA.
• Vz = Vb x K1 X K2 X K3 X K4

WHERE

• Vb = BASIC WIND SPEED = 47 m/sec
• K1 = RISK CO-EFFICIENT = 1.07
• K2 = TERRAIN ROUGHNESS AND HEIGHT FACTOR = 0.8
• K3 = TOPOGRAPHY FACTOR = 1
• K4 = IMPORTANTANCE FACTOR = 1

THESE VALUES ARE WE CAN TAKEN FROM THE IS CODE 875:2015

• CALCULATION OF WIND PRESSURE:-

Vz = Vb X K1 X K2 X K3 X K4

= 47X1.07X0.8X1X1

= 40.23 m/sec

• NOW WE CAN CALCULATE THE WIND PRESSURE (Pz)
• WE KNOW THE FORMULA

Pz = 0.6 X Vz²

= 0.6 x (40.23)²

= 971.071

RESULTS:-

WIND PRESSURE IS CALCULATED.

2

AIM:- TO CALCULATE THE DEAD LOAD AND LIVE LOAD FOR THE ABOVE BUILDING WITH REFERENCE TO IS STANDARDS (ASSUME SUITABLE SECTIONS)

PROCEDURE:-

DEAD LOAD:-

DEAD LOAD DUES TO THE SLABS

• ASSUMING 150mm AS THICKNESS OF SLAB
• DEAD LOAD DUE TO ONE SLAB = LXBXHXT = 20X30X25X0.15 = 225KN
• TOTAL DEAD LOAD DUE TO ALL SLABS = NO.OF.SLABS X DEAD LOAD DUE TO ONE SLAB.
• NOW WE HAVE 5 SLABS = 5 X 225 = 1125 KN

DEAD LOAD DUE TO THE BEAMS

• CONSIDERING THE BEAM C/S 300mm X 400mm
• DEAD LOAD DUE TO BEAMS = 0.3X0.4X25 = 3 KN/m

LIVE LOAD :-

• WE CAN CALCULATE THE LIVE LOAD OF A GIVEN STRUCTURE BY USING THE IS 875:2015 PART-2 WHICH STAES THE DIFFERENT LIVE LOAD VALUES FOR DIFFERENT ROOMS.
• AS OUR BUILDING IS THE HOSPITAL BUILDING ALL THE PROPOSED LIVE LOAD VALUES FOR HOSPITA,L BUILDING ACCORDING TO THE IS 878:2015 PART-3 HAS BEEN LISTED BELOW

S.NO	OCCUPANCY	LIVE LOAD
1	WARD ROOM,DORMITIORIES	2.0KNm2
2	LABORATORY	3.0KNm2
3	CAFETERIA	3.0KNm2
4	TOILETS & BATHROOMS	2.0KNm2
5	X-RAY ROOMS & OPERATING ROOMS	3.0KNm2
6	OFFICE & OPD ROOM	2.5KNm2
7	CORRIDOR & PASSAGES	4.0KNm2

RESULTS:-

ALL DEAD LOADS AND LIVE LOADS ARE SHOWNED.