Cable - Stayed Bridge Construction Control Simulation Analysis

The extradosed cable-stayed bridge is a new kind of structural forms of bridge developed on the basis of the cable-stayed bridge in the last few years. As regards structural characteristic, the extradosed cable-stayed bridge is a kind of new bridge type between the continuous beam bridge and the cable-stayed bridge. At present there are fewer extradosed cable-stayed bridge built at home, understand the structural characteristic of the extradosed cable-stayed bridge incompletely, and the construction experience of the bridge and research materials are corresponding less. So launching research about mechanics performance analysis and construction monitor control of extradosed cable-stayed bridge have important theory meaning and practical value. What this text works and just launches under this background.This text take the main bridge of the Yellow River 2nd bridge of Ashen freeway inKaifeng------7 towers 8 spans prestressed concrete extradosed cable-stayed bridge which isunder construction as the project example. According to this bridge unique feature, using the finite element method to carry on the separate to the bridge, main beam, bridge pier, bridge tower using spatial beam element, stay cable using tension-only element, we has established spatial finite element computation model of this extradosed cable-stayed bridge. Using Midas/Civil, one bridge finite element computational procedure, we carried on the static analysis, the mechanical analysis and the stable analysis of this bridge under operation condition, discussed the mechanics performance difference between the extradosed cable-stayed bridge and the general cable-stayed bridge. Using the progressive analysis to carry on artificial simulation to the construction course of this bridge, we discussed construction monitoring content of the extradosed cable-stayed bridge. Above the synthesis works below, this article draws the conclusion:1.. The main beam of this extradosed cable-stayed bridge is total cross-section bearing under operation condition. The influence of live load to the deflection of the main beam and the stress of the stay cable is not obvious; The live load causes the bridge tower to have the certain displacement, but the displacement is not obvious; the bridge tower cannot receive the big eccentric compression; The stress of other various components of the bridge is in the bridge design standard stipulation scope, indicated the bridge structure stress is reasonable.2. The 1st steps shake frequency of this bridge is 0.6086HZ(whole verticality vibration of the bridge deck system). Low steps vibration of the bridge show as whole verticality vibration of the bridge deck system and horizontal vibration of the bridge tower. Because the width-span ratio of this bridge is heavier, whole verticality vibration of the bridge deck system appear earlier. The first two steps are whole verticality vibration of the bridge deck system. The ratio of the 1st step reverse frequency of the bridge and the 1st step vertical stroke curved frequency of the bridge deck system is 4.01, indicated this bridge has the good...