| Dispersive tube structure is a new type of architecture, this structure is suitable to high-rise buildings. As load-bearing structural elements of this structure, smaller tubes are dispersed around the structure, connected to each other via connecting elements such as frame beams, work together to resist lateral force. Dispersive tube structure has the features of flexible in arrangement, area utilization high and vertical stiffness well distributed. Dispersive tube structure fits development tendency of modem high-rise building.Based on the above results of previous studies, this paper addresses the shortcoming of structural measures had studied that is protrusion on the wall, which has negative influence on space service function, beauty and safety. This article deeply explores with structural measures which do not affect internal space. This article analyzed internal forces of the optimization dispersive tube structure by PKPM software. Cutting a beam-plate-wall joint on the top floor and a corner of elevator wall on the top floor to process partly strengthen. This paper used ansys finite element analysis software for numerical simulation analysis of strengthened joints. Comparing analysis results of different measures to draw relevant conclusions and practical engineering proposals.First, numerical simulation analysis is carried for strengthened beam-plate-wall joint and elevator wall joint on the top floor. The beam-plate-wall joint of top floor is under seriously out-of-plane flexure and the crack of the wall has a tendency of cutting through. There are three main problem in the elevator wall joint of top floor. First, there is a big difference in the stresses of two steel bars in the beam. Second, stress concentration occurs in intersection part of wall. Third, concrete is partly crashed. In general, the joint is in week stress condition. Second, to solve these problems exist in the beam-plate-wall joint, this paper adopted three strengthen measures:local setting channel steels, local setting steel plates and local setting steel bars. Each of measures combines with different specifications and different arrangements to form a large number of projects. Then projects are under numerical simulation analyzed. The article draws followingconclusions upon comparison of analysis results. Setting channel steels or setting steel plates can improve the deformation behavior and crack condition. Excessive using of steel will led to stress concentration and produce a new set of problems. Specific analysis on practical engineering should be done before use the two above measures. The measure of local setting more steel bars can better solve the crack problem and its construction craft is simpler. Compared with the other two measures, setting more steel bars has some practical significance for project.Third, to solve problems exist in elevator wall joint also adopted three strengthen measures:local setting channel steels, local setting steel plates and local setting steel bars. Several plans under the three measures are numerical simulation analyzed. Results obtained from analysis that setting steel plates and setting steel bars can not improve stress situation of joint and setting steel plates can led to serious stress concentration. Setting channel steel in the wall can improve the deformation behavior and it can not solve the problem of unbalance stress in steel bars. Conclusion can be drawn that we should find other measures to solve the problem in the second joint. |
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