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15 April 2007, Volume 26 Issue 2 Previous Issue    Next Issue

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Inquiry into Cracks in the W ebs of Curved Prestressed Concrete Box Girders CHEN Bo;ZHOU Zhi-xiang;LIU Ji-zheng 2007, 26(2): 1-4.  Abstract ( )   PDF (279KB) ( )   Based on the analyses of the reasons for the cracks produced in the webs of curved prestressed concrete box girders， a modified formula is ded uced for calculating the radial forces produced from the deviation ofthe location ofprestressing tendons，the further form ula is presented for checking the thickness of the webs and the other measures to avoid cracking in the webs are also discussed，which may be re,terence for the design and construction of such kind of bridge. References | Related Articles | Metrics

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Finite Element Analysis of Two New Types of Shear Connector in Composite Steel-concrete Beam ZHANG Xia;XIANG Zhong-fu 2007, 26(2): 5-8.  Abstract ( )   PDF (248KB) ( )   Two new types of shear connectors(i.e.PBL conector and embedded conector)and traditional bolt connectors are contrasted，and shear con ector of composite steel-concrete con ector is especially analyzed by FEA method.Analysis resuits indicate that anti-shear pin formed in two types ofconnectors plays a great role in resisting longitudinal shear ofcomposite beam。and the prope rest shear con ecter used for the construction is being pursued ，which Can be the foundation of such kind of building . References | Related Articles | Metrics

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Nonlinear Stability Analysis of Large-span CFST Arch Bridge CHEN Shi-rain ; ZHOU Ren.zhong 2007, 26(2): 9-13.  Abstract ( )   PDF (282KB) ( )   A spatial nonlinear model is established and the linear and nonlinear analyses of stability on a large-span CFST arch bridge are maken during its construction process and the serving phase through the Nastran structure analysis system. Discussions on various kinds offactors which would afect the stability of a CFST arch bridge are made.As a result.some important conclusions arc obtained ，which may be valuable for the design and construction of such kind of bridge. References | Related Articles | Metrics

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Study on Improving the W hole Rigidity of Prestressed Concrete Three-pylon Cable-stayed Spans TAO Neng-qian;WANG Fu-min 2007, 26(2): 14-20.  Abstract ( )   PDF (338KB) ( )   The intermediate pylon of three-pylon cable-stayed spans lacks back-stays to limit its longitudinal displacement， which makes the structure more flexible.As a result.its deformation is so considerable that the whole structure's rigidity fails to the request of deform ation tolerance.According to the analy8i8 of a blue print of a three-pylon cable-stayed bridge across the Changjiang River with the finite element software MIDAS，making use of the available methods at present，a suitable method to improve the rigldity of this three-pylon cable-stayed spans is brought forth，which can be applied in other eonstradions like this. References | Related Articles | Metrics

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Comment on the Usual Analytical Methods of Long Span PC Continuous Rigid Frame Bridge WANG Yun-tao;ZHANG Xue-song;GU An-bang 2007, 26(2): 21-23.  Abstract ( )   PDF (204KB) ( )   Based on the related references，the present research situation about the spacial stress analysis of continuous rigid frame bridges inland is introduced；the characteristics of diferent analytical methods，especially the present software used for simulation analysis in bridge construction are summarized and an alyzed，and the conclusion is put forward that it's necessary to conduct the secondary development to complete the entire process analysis of a bridge construction. References | Related Articles | Metrics

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Semi-analytical Solution for Longitudinal Vibration of Rigidity Supporting Pile YU Wen-ji 2007, 26(2): 24-28.  Abstract ( )   PDF (228KB) ( )   By using a soil modeling ofthree axes symmetry and considering three dimensions wave efect，the longitudinal vibration charaeterisitic is analyzed on condition that a vertical force being harmonious and stimulating force is loadoed upon the whole newel stake in the damping soil of homogeneous and detained materia1.The frequency domain response of the pile head，complex stifness and mobility can be obtained as wel1.According to the convolution theorem and the inverse Fourier transforms.a semi-analytic solution oftime domain response ofvelocity admittance is obtained on condition that a stimulating forces of a half sine pulsation. References | Related Articles | Metrics

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MatLab Application to the Matrix Deduction of Finite Element Stifnes ZHOU Shuixing;CHEN Shan-lin 2007, 26(2): 29-31.  Abstract ( )   PDF (140KB) ( )   MatLab has a strong symbolic operation function．With the example of stifness matrix of plane beam element，the application of deducing element stifness matrix is introduced in detail for the first time，and the symbolic operation procedure of plane beam element is developed，and the ope ration result is completely in accordance with the handicraft deduction．This method can further expand the application of deducing matrix to other elements even more complicated nonlinear element. References | Related Articles | Metrics

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Dihedral M ethod in Measuring Bridge Axial Alignment QIAO Dun;ZHOU Jian-ring;LIU Si-meng;Zhen Zhi-ming;Tan Yong 2007, 26(2): 32-35.  Abstract ( )   PDF (189KB) ( )   The bridge axial alignment is a key point to bridge bearing capacity evaluation。disease analysis，health analysis and taking-over inspection．However，the routiile technique is cosily both in time and in finance，and what's more，the preciseness of the inspection Can’t be guaranteed．Taking the main arch axial alignment of an existing arch bridge as an exanlpie， the dihedral method in measuring bridge axial alignment is introduced.The experiment proves that the discussed technique is reliable，precise，simple and practica1. References | Related Articles | Metrics

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Study on Mechanical Coeficients of Anchor Cables by Experiment LIU Hua-tai;ZENG De-rong 2007, 26(2): 36-39.  Abstract ( )   PDF (207KB) ( )   Based on expounding the importance of mechanical coeficients for anchor cables design，some methods and steps which are used to get mechanical coeficients of anchol"cables are presented．and the criterion of losing efficacy in anchor is slven.An example is put forward with useful process record and data ofthe experiment which induce some methods and conelusions， which may be used for reference in other design and construction like this. References | Related Articles | Metrics

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Application of Slippery-frame Pours Mould Technology to the IIigh-pile、vith Hollow-thin W al ZHU Yu-li;YANG Li 2007, 26(2): 40-43.  Abstract ( )   PDF (164KB) ( )   The technology of slippery-frame pours mould in the high-pile with hollow-thin wall of Shangyang Bridge in Fujian Jinoeu Expressway is introduced．The bridge combines the advantages of slippery mould and turning over mould，guarantees the construction speed and quality ofthe project.and meets the appearance quality requirement of mound body as wel1.The application prospect of the technology is put forward according to the construct/on efect and the characteristics of slippery frame po urs mould. References | Related Articles | Metrics

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The Role of Ultrasound Test Technology in Construction Quality Control in the CFST Arch Bridg LIU Xiao-yu 2007, 26(2): 44-46.  Abstract ( )   PDF (198KB) ( )   The pressure quality of CFST is the key to guarantee the whole quaty of a CFST arch bridge.The basic method and principle of ultrasound test technology are introduced.As an example．this technology was appled in Heyang Jialing River CFST arch bridge to chek the structural me mber for any imperfect quality problem．such as uncom pactness and cavity or gap.It proves that the ultrasound test technology plays an important part in CFST bridge for quality control of a construction project. References | Related Articles | Metrics

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Construction Control of the Xiaoanxi Continuous Rigid Frame Bridge CHEN Si-tian;ZHAO Li-li;GONG Shang-long;LIU Shui 2007, 26(2): 47-50.  Abstract ( )   PDF (211KB) ( )   The construction control of continuous rigid frame bridges by the segmental cantilever method is studied in the light of engineering practice of Xiaoanxi bridge，and the feasible control methods are proposed.Futhermore，the influence of shrinkage and creep on the large-span bridge during its service is specially an alyzed.An additional camber with shrinkage and creep is counted in.The better connecting precision is acquired，the smoother line-type of the bridge is formed.