Research On Construction Monitoring Of CFST Arch Bridge And The Influence Of Temperature

Owing to the superiority of material and construction, Concrete-Filled Steel Tubular (CFST) arch bridge whose arch ribs are made of concrete fil1ed steel tube has achieved rapid deve1opment in recent years in our country.The inner temperature field of bridge structures which are located outdoor in most case is influenced by radiation, circumstance temperature and other factors. As to Concrete-Filled Steel Tubular (CFST) arch bridge, marked discrepancy in the thermal capability of stee1 and concrete, diversity temperature distribution on section of arch ribs and variable temperature field of the place bridge located make CFST more sensitive to air temperature than the other concrete bridges. The constructions of CFST arch bridge which is supported middle have marked difference about solar radiation, there wi1l come forth temperature field of special Structure. At the same time, because the arch sections Of CFST arch bridge are always bigness, the temperature field of the arch sections at solar radiation are not axisymmetric. Accordingly, the study about variational rule of the temperature fie1d of the arch sections is integrant. The study is necessary for appraising to the distortion of CFST arch bridge. Especially, the Study has applied value of engineering application in the area where the difference in temperature of age and day are great.Lofting coordinates of steel-tube arch ribs of CFST arch bridge is the foundation of line-shape control of arch ribs. By way of introducing geometric character parameters of arch rib segments reflecting geometrical feature of the whole arch in the paper, a simulating computation of lofting coordinates of steel-tube arch rib is made to analyse the effect of elastic deformation on the fabrication line shape with the aid of forward algorithm and backward algorithm.Though the temperature of observation experimentation on HElSHIPU CFST arch bridge, the temperature field of arch section in the course of concrete concretion was measured. Simultaneity, the temperature fie1d of arch section in winter and summer were measured. Though the measure of flexibility observation experimentation of arch axis on HEISHIPU CFST arch bridge. The connection of flexibility and temperature variation were studied. The calculational model of spacial member of HESHIPU CFST arch bridge was based on ANSYS software. Though the model, the flexibility of arch axis were accounted, and the flexibility difference between calculate and measure were analyzed.