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Abstract: In order to give full play to the effect of temperature regulation and energy saving of the phase change wall, the cement mortar mixed with phase change microcapsules was coated on the surface of the wall to form the phase change energy storage wall. Considering the thermal response of the temperature inside the wall, the heat transfer theoretical model of the phase change energy storage wall was established. The heat transfer process in the phase change energy storage wall and the temperature change inside the wall. The calculation results show that the content of phase change microcapsules in the phase change energy storage wall is one of the important factors affecting the temperature attenuation of the inner side of the wall. The peak time of the temperature change response curve on the inner side of the phase change wall is lagging behind that of the conventional wall, and the existence of the highest temperature is also lower, the peak temperature fluctuation is also lower, and the heat flow is reduced. It can be seen that the introduction of phase change microcapsules into the wall can achieve the purpose of reducing the temperature inside the wall and reducing the capacity of the air conditioning and refrigeration system of the building, which provides a good way to reduce the energy consumption and cost of building refrigeration.Abstract: In order to give full play to the effect of temperature regulation and energy saving of the phase change wall, the cement mortar mixed with phase change microcapsules was coated on the surface of the wall to form the phase change energy storage wall. Considering the thermal response of the temperature inside the wall, the heat transfer theoretical ...Learn More
Abstract: The project of Wuhan Group Kunming Iron and Steel Co., Ltd., Promote the supply side structural reform and implement the special upgrading project of environment comprehensive raw material yard project ore yard (A to B) reticulated shell structure Located in Kunming Steel New Area, Cao pu Town, Anning City, Kunming City, Yunnan Province, 780m long, 50m high, the span is 147m (more than 120m), According to «Code for Seismic Design of Buildings» and «Technical points of special review on seismic fortification of high-rise buildings beyond the limit», it belongs to the out of gauge large-span space structure, Special review of engineering seismic fortification is required. The structural analysis of the project adopts SAP2000, MST2020, MIDAS Gen three kinds of software for calculation and analysis, And the individual model and the whole model are established respectively, Envelope analysis is carried out for two cases. Through linear elastic analysis, response spectrum small earthquake analysis, Medium earthquake analysis of response spectrum, elastic time-history analysis of small earthquakes, dynamic elastoplastic analysis of large earthquakes to analyze and calculate the deformation of latticed shells and the stress of membersl. Through a series of structural analysis and structural measures, To ensure that the reticulated shell and the lower part are coagulated on the short column and all performance indicators can meet the specification requirements. Through the structural analysis of two calculation models, ensure that all performance indicators can meet the specification requirements.Abstract: The project of Wuhan Group Kunming Iron and Steel Co., Ltd., Promote the supply side structural reform and implement the special upgrading project of environment comprehensive raw material yard project ore yard (A to B) reticulated shell structure Located in Kunming Steel New Area, Cao pu Town, Anning City, Kunming City, Yunnan Province, 780m long,...Learn More
Abstract: This paper adopts a new method of pasting steel plate to restore the transverse connection of hollow slab bridge, so that the strengthened bridge can meet the requirements under the state of serviceability. The original beam of the concrete hollow slab with a span of 8m from the Suizhong to Shenyang section of Jing-Shen highway was reinforced by a method of pasting steel plates. In the test the eccentric load condition was loaded and the abaqus software was used for numerical calculation after the reinforcement. Based on the theory of load transverse distribution coefficient of bridge structure, different calculation methods were used to obtain the transverse load distribution coefficient of the strengthened test beam, and it is verified that the hinged plate method can be used to calculate the hollow slab beam strengthened with steel plate. In addition, combined with previous calculations, test results and numerical analysis, this paper discusses the restoration effect of the new type of pasted steel plate reinforcement method on the bridge lateral connection. The results show that the hinged plate method can be used to calculate the load lateral distribution coefficient of hollow slab beams strengthened by pasted steel plates. therefore, the pasted steel plate reinforcement method can effectively restore the horizontal connection between the hollow slabs and meet the use of bridge structures.Abstract: This paper adopts a new method of pasting steel plate to restore the transverse connection of hollow slab bridge, so that the strengthened bridge can meet the requirements under the state of serviceability. The original beam of the concrete hollow slab with a span of 8m from the Suizhong to Shenyang section of Jing-Shen highway was reinforced by a ...Learn More
Abstract: For a project in Nanjing Jiangbei New Area, after excavation of foundation pit and foundation plate pouring, water inrush between side wall of foundation plate and wall occurred in foundation pit. At this time, the water level of confined water observation wells in 2-4 and 2-5 silty fine sand layers in foundation pit can meet the requirements of safe water level control. According to the analysis, the inrush water is inrush water from 3-4e and 3-4 coarse sand layers in deep layer. It is difficult to treat the floor slab in the pit due to the completion of construction. In order to solve the problem of water inrush in the pit, the measures of precipitation outside the pit are adopted, but precipitation causes rapid settlement of the ground in adjacent areas. In order to reduce the ground settlement, a recharge well is specially designed, the recharge test is organized, the structure of the recharge well is optimized, and the spacing between the two layers is arranged according to the test results. The problem of recirculation between pumping and recharging outside the pit is solved. Finally, settlement was successfully controlled. Without water-stop curtain, the project carries out precipitation and recharge outside the pit at the same time, which not only solves the inrush water, but also controls the settlement. In addition, the foundation pit is deep and inrush water is large. During the process, the analysis is carried out first, and then the test is carried out, so that the purpose of recharge can be achieved. It has reference value, so it is concluded in writing.Abstract: For a project in Nanjing Jiangbei New Area, after excavation of foundation pit and foundation plate pouring, water inrush between side wall of foundation plate and wall occurred in foundation pit. At this time, the water level of confined water observation wells in 2-4 and 2-5 silty fine sand layers in foundation pit can meet the requirements of sa...Learn More
Abstract: In order to improve the effectiveness and convenience of damage identification of two-span continuous beams, a new damage identification index Di based on the deflection data of beam under concentrated load, which takes local flexural stiffness and shear stiffness as damage identification parameter, was proposed. The damage detection method based on Di includes four main steps: arranging vertical deflection measurement points at equal intervals on the beam body and applying a concentrated load F at the mid span position of one of the spans. After measuring the yi value at each measurement point, the differential deflection curvature value 1/ρi can be calculated; After obtaining specific values of Di according to the definition, a graph with Di as the vertical coordinate and the positions of each measuring point on the longitudinal axis of the beam as the horizontal coordinate can be drawn; The mutation position on the graph can indicate the location of the damage: if the mutation starts from point j, it indicates that the damage occurs in the area between measurement points j+1 and j+2; By selecting any two values from Di-1, Di, and Di+1 and solving the corresponding definition equation simultaneously, the degree of beam damage characterized by the relative change in local stiffness can be determined. The results of numerical example validation indicate that this method has good damage identification performance.Abstract: In order to improve the effectiveness and convenience of damage identification of two-span continuous beams, a new damage identification index Di based on the deflection data of beam under concentrated load, which takes local flexural stiffness and shear stiffness as damage identification parameter, was proposed. The damage detection method based o...Learn More
Abstract: Based on the database platform of China National Knowledge Network, this paper selects literature research objects related to "rural housing" from 5 major journals of urban planning, such as "Urban Planning Forum", and uses CiteSpace software to visualize the data of relevant journal literature from 1994 to 2022, so as to obtain the scientific knowledge map of domestic rural housing research. Further get the development and evolution of related research, research hotspot and future trend. The results show that: the number of domestic rural housing papers presents a rising trend, but in 2022, there will be a cliff drop; The research process has changed from the topic of inheritance and protection of rural traditional houses and planning exploration of rural well-off residential areas, under the urban-rural integration and new rural policy, to the research on specific solutions to rural, rural and rural issues, and then to the beautiful countryside policy, the research direction is diversified, and different rural areas put forward targeted protection and development methods for different situations; The research focuses on the guidelines and development direction of rural planning and construction, the inheritance, protection, renewal and development of rural dwellings, and problems encountered in rural planning practice. In the future, more in-depth studies will be conducted on traditional villages and rural revitalization.Abstract: Based on the database platform of China National Knowledge Network, this paper selects literature research objects related to "rural housing" from 5 major journals of urban planning, such as "Urban Planning Forum", and uses CiteSpace software to visualize the data of relevant journal literature from 1994 to 2022, so as to obtain the scientific know...Learn More
