Construction Control For Tianluo Bridge And Temperature Effect Analysis

With the fast development of transportation enterprise of highway and railway, more and more long span continuous rigid frame bridges are built with their own unique advantages. To keep the accordance of alignment of built bridges with the expectation and to insure the safety of bridges in construction, the construction control is paid more and more attention.In this thesis,the main structural analysis methods of construction control for long span bridges which are named sequential calculation method and anti-sequential calculation method are discussed.Then,taking tianluo bridge on passenger dedicated railway as a project background ,the sensibilities of main design parameters are carefully analyzed.Then,the content and method of construction control of tianluo bridge are introduced in detail,including line-shape supervision,stress supervision and stability supervision.In the final,have a profound research on temperature effect, analyze stress and distortion of the beam caused by sunshine temperature difference and annual temperature difference,decide reasonable joining temperature and giving some advice to prevent and reduce temperature effect.Main research works of this dissertation are included below:Take tianluo bridge on passenger dedicated railway as a project background,build simulated calculating model by using MIDAS/CIVIL,analyze the effects on stress and distortion of the beam which caused by sensible parameters such as density of concrete, elastic modulus of concrete,shrinkage and creep, temperature.Introduce the implementation of tianluo bridge's construction control.Then introduce the methods of construction control of line-shape supervision and stress supervision,take contrastive analysis on theoretical value and actual value,according to Eluer elastic theory, analyze the stability of the max cantilever stage.Analyze stress and distortion of the beam caused by sunshine temperature difference using four different temperature patterns,analyze the effect on the beam caused by temperature difference of piers, decide reasonable joining temperature by taking contrastive analysis on three different joining temperature and give some advice to prevent and reduce temperature effect.