Construction Engineering

Technical University of civil engineering bucharestConstruction EngineeringProject part 2

[Type the author name]1/1/2015

INPUT DATA:

No.2 Longitudinal Girder beam

(6 bays)

ERECTION CHARACTERISTICS TABLE ColumnsThe exterior column has the section of 45x50 cm and the central column has the section of 50x65cm.The height of the column is:

The load coming from the columns is computed using the formula:

Girder beam

The condition of choosing the girder beam is: .From the table below the girder beam chosen is: G9-2.Length [cm]: L= 870cmWidth [cm]: h=70cmHeight [cm]: H=103cmh=90cmWeight [kg]: W=6160kgVolume [m3]: V=2463 m3 Concrete Class [N/mm2]: C50/40Distance between inserts [cm]: 810cmBay [m]: 9x15

Bridge beamsThe bridge beams are made of pre-stressed reinforced concrete, and they may be of two kinds: with one slope (length of 6 or 9m, longitudinal) or two slopes (length of 12 and 24m, longitudinal or transversal). The one chosen in this project is: GRP 9-100.Characteristics:L=892cml=55cmH=100cmW=6000kgV=2.3m3Concrete class C40/32Distance between inserts: 792 cmBay: 1230m

Roof slabsRoof members are area elements having the width of 1.5m.These elements support on the girder beams and have the length almost equal to the distance between the girder beams.

The Roof slab that is suitable for this project is: ECP15x1.5.Characteristics:L=1465cml=149cmH=65cmh=26cmW=5510kgV=2.204m3Concrete class C50/40Distance between inserts: 1380 cm

The complex method The complex method consists of organizing the erection stages in normal succession for all elements of a small area. After finishing this zone , the erection is continued on the following span or bay.Advantages: Since all the elements are erected on a small area from a single crane stop, the execution time is reduced, due to the fact that the crane travels through the building once and to the low number of stops and levelling. After finishing erecting the elements on the first area, the auxiliary works may start, usually with a delay of one area. The procedure leads to the drastic reduction of total execution time and to the quick reception of the building. Disadvantages: The irrationa use of the lifting machines. a singlr crane, of high performance is used. The crane must be able to lift the behaviest elements and, eventually, with a great mounting radius. In case erection errors appear, surpassing the limit tolerances, they are corrected with difficulty ad with high execution costs. Sometimes supplementary stability works may be done in order to insure the structures stability up until the finishing of the connections.The complex method is usually used for steel structures, due to the following reasons: the mounting errors have magnitudes of milimiters and are easly corrected in comparison to the precast concrete buildings the weights of elements are similar and relatively small, whereas the precast concrete columns used for industrial buildings surpass 10 tons.Mounting stages:StageLGB

IEC+CC

IIGB+BB

IIIRS

Sequential erection in longitudinal direction (LGB)a. Columns erectionb. Longitudinal girder beams erectionc. Roof slab erection

Lifting device for columnsThe maximum load that the lifting device must carry is the one coming from the central column:

Item U312:Qd =460kgfHd=5630mmQmaxpref=10tf Lifting devices for beams The device chosen in this section is used for lifting bridge beams and girder beams.The conditions that this device must fulfilled are: the device should have 2 hanging cables

The code for the device used for lifting the girder beams and the bridge beam is U300.Qd=1980kgfHd=2890mm Qmaxpref=10tf

Lifting device for lifting roof slabsRoof slab members are surface elements, so they must be lifted with special devices with 4 cables. Conditions: 4 cables devices

The device chosen has the code U317.Qd=1736 kgfHd=3427 mm Qmaxpref=8.0 tf

ERECTION CHARACTERISTICS

The Columns

-safety height

Bridge girder

Longitudinal Girder Beam

RANE CHARACTERISTICS

Establishing the aproximative radius of the erection of the columns

Choosing the craneThe type of crane chosen is crane on tyres PH 430 T.C.Knowing that the aproximative radius is Ra=6.37m we will choose from the table with characteristics of crane the one with: RC=7.62m.HT=16.01mQt=9.26tfThe other characteristics of the crane are:Grades: 69oHC=19.18mQc=14.38tfF=18.29mBM=3.93m

Computing the real placement of the crane

Roof slabs