In order to study bearing characteristics of bridge pile at steep slope under complex loads in mountians, according to double pile-column bridge piers engineering at steep slope and test models in laboratory, finite e...In order to study bearing characteristics of bridge pile at steep slope under complex loads in mountians, according to double pile-column bridge piers engineering at steep slope and test models in laboratory, finite element analysis of pile-column bridge piers was carried out using software ADINA under different loadings, such as horizontal loading in the longitudinal direction along bridge, vertical loadings, slope top loadings and complex loadings. The numerical simulation results show that displacements of front pile pier top and back pile pier top are different under horizontal loadings in the longitudinal direction along bridge or vertical loadings, the displacements of front pile pier top are higher than those of back pile pier top, and its difference increases with the increase of loadings. Vertical displacements will also appear under slope top loadings, and displacements of front pier top are higher than those of back pier top too, while its difference reduces with the increase of loadings. Displacements of both front pile pier top and back pile pier top under comlex loading are larger than those under single loading.展开更多
Purpose： To compare the efficacy of percutaneous poking reduction and fixation with open reduction and fixation in the treatment of displaced calcaneal fractures. Methods： Reports of studies using case-controlled tr...Purpose： To compare the efficacy of percutaneous poking reduction and fixation with open reduction and fixation in the treatment of displaced calcaneal fractures. Methods： Reports of studies using case-controlled trials （CCT） to compare the percutaneous poking reduction and fixation with the open reduction and fixation in the management of calcaneal fractures were retrieved from the Cochrane Library, PubMed Database, CNKI, Chinese Biomedical Database, Wanfang Data （fromJanuary of 2005 to August of 2015）. Methodological quality of the trials was critically assessed, and relevant data were extracted. Statistical software Revman 5.0 was used for data-analysis. Results： Fifteen articles were included in the meta-analysis. Comparison of the efficacy of percutaneous poking reduction and fixation with open reduction and fixation in the treatment of calcaneal fractures revealed statistical significance in the incidence of complications after operation [RR -- 0.32, 95,~ Cl （0.20, 0.5）, p 〈 0.05]. However, there were neither statistical significance in the degrees of recovery for calcaneal Bohler angle [WMD = -1.65, 95% CI （ 3.43, 0.14）, p 〉 0.05] and calcaneal Gissane angle [WMD - -3.21, 95%, Cl （-6.75, 0.33）, p 〉 0.05], nor statistical significance in the rate of good foot function after operation [RR = 0.95, 95Z Cl （0.90, 1.00）, p 〉 0.05]. Conclusion： For the treatment of calcaneal fractures, percutaneous poking reduction and fixation is superior to open reduction and fixation in terms of the incidence of postoperative complications. But both techniques can obtain satisfactory clinical function.展开更多
基金Projects(50878083,50578060)supported by the National Natural Science Foundation of ChinaProject(200831878531)supported by the Ministry of Transportation of China
文摘In order to study bearing characteristics of bridge pile at steep slope under complex loads in mountians, according to double pile-column bridge piers engineering at steep slope and test models in laboratory, finite element analysis of pile-column bridge piers was carried out using software ADINA under different loadings, such as horizontal loading in the longitudinal direction along bridge, vertical loadings, slope top loadings and complex loadings. The numerical simulation results show that displacements of front pile pier top and back pile pier top are different under horizontal loadings in the longitudinal direction along bridge or vertical loadings, the displacements of front pile pier top are higher than those of back pile pier top, and its difference increases with the increase of loadings. Vertical displacements will also appear under slope top loadings, and displacements of front pier top are higher than those of back pier top too, while its difference reduces with the increase of loadings. Displacements of both front pile pier top and back pile pier top under comlex loading are larger than those under single loading.
基金This study was funded by the National Natural Science Foundation of China （No. 81572098）.
文摘Purpose： To compare the efficacy of percutaneous poking reduction and fixation with open reduction and fixation in the treatment of displaced calcaneal fractures. Methods： Reports of studies using case-controlled trials （CCT） to compare the percutaneous poking reduction and fixation with the open reduction and fixation in the management of calcaneal fractures were retrieved from the Cochrane Library, PubMed Database, CNKI, Chinese Biomedical Database, Wanfang Data （fromJanuary of 2005 to August of 2015）. Methodological quality of the trials was critically assessed, and relevant data were extracted. Statistical software Revman 5.0 was used for data-analysis. Results： Fifteen articles were included in the meta-analysis. Comparison of the efficacy of percutaneous poking reduction and fixation with open reduction and fixation in the treatment of calcaneal fractures revealed statistical significance in the incidence of complications after operation [RR -- 0.32, 95,~ Cl （0.20, 0.5）, p 〈 0.05]. However, there were neither statistical significance in the degrees of recovery for calcaneal Bohler angle [WMD = -1.65, 95% CI （ 3.43, 0.14）, p 〉 0.05] and calcaneal Gissane angle [WMD - -3.21, 95%, Cl （-6.75, 0.33）, p 〉 0.05], nor statistical significance in the rate of good foot function after operation [RR = 0.95, 95Z Cl （0.90, 1.00）, p 〉 0.05]. Conclusion： For the treatment of calcaneal fractures, percutaneous poking reduction and fixation is superior to open reduction and fixation in terms of the incidence of postoperative complications. But both techniques can obtain satisfactory clinical function.
