the several kinds of pile-soil simplified analysis models were enumerated in the paper. Four analysis models were chose to build the elevated-pile- foundation FEM of a cable-stayed bridge. Then dynamic analysis and pu...
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Adaptive control theory, structural parameter identification and error analysis are used to control the construction of PC cantilever casting bridge in the paper. The construction camber for main beam can be determine...
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Adaptive control theory, structural parameter identification and error analysis are used to control the construction of PC cantilever casting bridge in the paper. The construction camber for main beam can be determined by BP artificial neural network. The deflection of main beam should be tested persistently. Strain sensors are previously located in beam to determine the concrete strain. The paper analyze some infection factors of strain test, such as concrete shrinkage, creep, temperature influence, and the strain correction method is proposed. So the stress and deflection of main beam in construction period can be controlled. Practical application approved that adaptive control theory combining with ANN could forecast appropriate camber. The factor of concrete shrinkage and creep could not be ignored on strain test of main beam. Measured value should be corrected to make us obtain objective stress status of structure. The correction method on measured strain which the paper proposed is feasible and accurate.
Adaptive control theory, structural parameter identification and error analysis are used to control the construction of PC cantilever casting bridge in the paper. The construction camber for main beam can be determine...
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In order to investigate the seismic behavior of cold-formed steel stud wall, 10 full scale specimens are tested under low-cycle lateral loading. Based on the tests, the main failure modes and the main failure processe...
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In order to investigate the seismic behavior of cold-formed steel stud wall, 10 full scale specimens are tested under low-cycle lateral loading. Based on the tests, the main failure modes and the main failure processes of these walls are studied. The seismic performance of these walls such as hysteresis curves, skeleton curves, bearing capacity, ductility and energy dissipation is discussed. Then, a deteriorated quadralinear restoring force model of cold-formed steel stud wall is put forward based on hysteresis curves obtained from regressive analysis experiment. The restoring force model considers some influencing facts such as stiffness degradation, slipping and pinching effect etc. The main results show that: sheathings influence wall's shear resistance greatly. When the specimen is under vertical and horizontal load, stiffness, bearing capacity and displacement ductility factor of wall increase, but its energy coefficient decreases a little. With the increase of stud dimension and the decrease of stud space, the wall's stiffness and bearing capacity increase, but the wall's ductility factor and energy coefficient decrease.
According to the structure and construction features of prestressed concrete continuous rigid frame bridge, with reference to the principle of vibrational chord strain gauge to concrete, the vibrational chord strain g...
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According to the structure and construction features of prestressed concrete continuous rigid frame bridge, with reference to the principle of vibrational chord strain gauge to concrete, the vibrational chord strain gauges to concrete are used in the construction control of prestressed concrete continuous rigid frame bridgeThis paper introduces the measurement techniques and methods for stress and strain of main girder of the bridge, analyses some infection factors of stress measuring and testing, and presents the error analysis methods of stress measuring and testing and calculation methods of true stress of structureThe techniques and analysis methods prove to be quite effective through the applications and provide background data for constructing safely of prestressed concrete continuous rigid frame bridge.
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