Temperature Effect For Cable Replacement Project Of Cable-stayed Bridge And Its Influence On Construction Control

At present China has built more than 400 cable-stayed bridge,since the early protective measures of the cable-stayed is not perfect,resulting in the emergence of more serious cable damage soon after many cable-stayed bridge operators use,in order to protect operators security,multi cable-stayed bridge construction have been carried out to replace the stay cables.Cable-stayed bridge in exchange Sower repair construction,dismantling and installation and construction process in the cable-stayed bridge structural system is changing,for the protection of cable replacement design goals to achieve,it must be applied to control cable replacement project.Taking into account the duration of the control requirements of the general construction of cable-stayed bridge cable replacement carried out continuously day and night,in order to ensure the effectiveness of the monitoring of the construction,we must fully assess the impact of the temperature field on the bridge structure parameter status,consequently determine the most advantageous construction organization design.In this paper,a large collection of related concrete cable-stayed bridge cable replacement materials and construction environment with a similar concrete box girders,concrete towers,cables and temperature field data,by integrating analysis of the data to establish a suitable temperature field model.Relying Yinpen Ridge Xiangjiang River Bridge repair project Sauve change,the influence of temperature field model established rationality and temperature field of bridge structures of the state of internal force and displacement parameters,temperature effects on different places generated by a judge.The main contents of this work completed as follows:1)Aim at typical sunny and cloudy weather conditions,summarizes the major cable-stayed bridge member under typical weather conditions,temperature field distribution function types.2)To establish a uniform temperature field function within the atmospheric temperature is relatively stable period,concrete box girder and towers temperature gradient field functions associated with the atmospheric temperature,and relying on the use of engineering test data verify the validity of the establishment of a unified function of temperature field and reliability.3)Relying on engineering background to evaluate the temperature difference between cable-stayed bridge member field,the main beam vertical gradient temperature field,the impact of tower lateral temperature gradient field construction monitoring control parameters indicating concrete cable-stayed bridge construction monitoring analysis must consider the temperature difference between member and member field gradient temperature field of.4)Relying on engineering background,to assess the possible error condition and the new old Suosong Suo Cable Tension two key processes at different time temperature distribution is different,proven unified temperature field distribution function deduced cable replacement construction monitoring temperature field in impact analysis of practical significance.