The buckling resisting brace(BRB)is an efficient system against lateral loads that enjoy high seismic energy absorption capacity.Although desirable behavior of BRBs has been confirmed,the stiffness of the system is no...The buckling resisting brace(BRB)is an efficient system against lateral loads that enjoy high seismic energy absorption capacity.Although desirable behavior of BRBs has been confirmed,the stiffness of the system is not desirable that it can be compensated by changing the configuration of BRB braces.In so doing,the configuration in the form of double K(DK)is investigated to achieve more favorable behavior.Also,the required mathematical formulas were proposed to design the system.Comparison of DK system with other conventional BRB showed that the DK system has a better structural performance and is more economical(due to needing less core area)than other conventional BRB.Numerical results indicated that the DK system increases the lateral ultimate strength,lateral nonlinear stiffness,and energy absorption.Besides,the DK configuration reduces the axial forces created in columns in the nonlinear zone.Reducing material demand,created forces in the main frame,and also increasing of nonlinear stiffens by DK improve the structure’s safety.展开更多
Objective:To compare the effects of different conservative managements on patients with adolescent idiopathic scoliosis (AIS). Method:One hundred and four AIS patients were recruited for this study. The patients were ...Objective:To compare the effects of different conservative managements on patients with adolescent idiopathic scoliosis (AIS). Method:One hundred and four AIS patients were recruited for this study. The patients were divided into 3 groups:exercise (E group), brace (B group) and combined rehabilitation treatment (brace treatment combined with exercise, CR group). Radiological parameter were used to assess AIS patients before and after treatment. The Chinese version of scoliosis research society-22(SRS-22) patient questionnaires were filled out by patients after treatment. The SRS-22 scores were compared among management groups. Result:The maximal Cobb angles were smaller in E group than in B group or CR group both before and af- ter treatment. The maximal Cobb angles were significantly smaller after treatment than before treatment in B group and CR group. Function/activity was better in E group than in B group or CR group. Self-image/appear- ance and satisfaction with management were better in E group and CR group than in B group. There was no significant difference among treatment groups in pain and mental health. Conclusion:Both brace and combined rehabilitation treatment can reduce the spinal curve of AIS patients. Both exercise and combined rehabilitation treatment have positive influence on self-image/appearance and satis- faction with management. We support preference of combined rehabilitation treatment above brace treatment.展开更多
文摘The buckling resisting brace(BRB)is an efficient system against lateral loads that enjoy high seismic energy absorption capacity.Although desirable behavior of BRBs has been confirmed,the stiffness of the system is not desirable that it can be compensated by changing the configuration of BRB braces.In so doing,the configuration in the form of double K(DK)is investigated to achieve more favorable behavior.Also,the required mathematical formulas were proposed to design the system.Comparison of DK system with other conventional BRB showed that the DK system has a better structural performance and is more economical(due to needing less core area)than other conventional BRB.Numerical results indicated that the DK system increases the lateral ultimate strength,lateral nonlinear stiffness,and energy absorption.Besides,the DK configuration reduces the axial forces created in columns in the nonlinear zone.Reducing material demand,created forces in the main frame,and also increasing of nonlinear stiffens by DK improve the structure’s safety.
基金supported by the Science and Technology Committee of Shanghai Gran(t114119a2700)
文摘Objective:To compare the effects of different conservative managements on patients with adolescent idiopathic scoliosis (AIS). Method:One hundred and four AIS patients were recruited for this study. The patients were divided into 3 groups:exercise (E group), brace (B group) and combined rehabilitation treatment (brace treatment combined with exercise, CR group). Radiological parameter were used to assess AIS patients before and after treatment. The Chinese version of scoliosis research society-22(SRS-22) patient questionnaires were filled out by patients after treatment. The SRS-22 scores were compared among management groups. Result:The maximal Cobb angles were smaller in E group than in B group or CR group both before and af- ter treatment. The maximal Cobb angles were significantly smaller after treatment than before treatment in B group and CR group. Function/activity was better in E group than in B group or CR group. Self-image/appear- ance and satisfaction with management were better in E group and CR group than in B group. There was no significant difference among treatment groups in pain and mental health. Conclusion:Both brace and combined rehabilitation treatment can reduce the spinal curve of AIS patients. Both exercise and combined rehabilitation treatment have positive influence on self-image/appearance and satis- faction with management. We support preference of combined rehabilitation treatment above brace treatment.
