Shandong Provincial Key Laboratory of Appraisal and Retrofitting in Building Structures

Jinan, China

Shandong Provincial Key Laboratory of Appraisal and Retrofitting in Building Structures

Jinan, China

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Li S.,Nanjing Southeast University | Li S.,Shandong Jianzhu University | Li S.,Shandong Provincial Key Laboratory of Appraisal and Retrofitting in Building Structures | Sun W.,Nanjing Southeast University
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | Year: 2013

The real construction is subjected to the coupling action of mechanical loads and environmental actions. In the ocean atmosphere environment and deicing salt environment, the damage and deterioration laws of structure concrete under the coupling action of fatigue load and carbonation and chlorides as well as the interaction between concrete carbonation and chloride ion penetration were summarized from the viewpoint of material. The effect of concrete carbonation on the chloride ion penetration and the chloride ion penetration behavior after or under fatigue load were discussed emphatically. The existing problems which should be further investigated are suggested.


Sheng Q.-Z.,China Academy of Building Research | Xie Q.,Shandong Provincial Key Laboratory of Appraisal and Retrofitting in Building Structures | Wang X.,Shandong Provincial Key Laboratory of Appraisal and Retrofitting in Building Structures
Advanced Materials Research | Year: 2012

Adhesive anchors are widely used as post-installed fasteners in civil engineering. A typical steel-to-concrete connection includes multiple anchors which are commonly subjected to combined moment and shear loading. Based on the assumption that all anchors take up shear load, a revised method is developed for the design of ductile anchors, which considers that only the row of most stressed anchors in the tension zone are needed to meet the elliptical interaction of tension and shear capacity requirement during the design process of anchorage group under combined shear and moment loading. The ultimate strength of post-installed fastenings should be controlled by the strength of anchor steel for the purpose of connection safety and full utilization of anchor capacity. For the objective of ductile design in anchor group, the ratio of shear span could be used as an evaluation parameter in the process of strength prediction. According to the theoretical analysis and results comparison, the ductile failure of anchor steel in post-installed fastenings can be guaranteed when the ratio of shear span is greater than 0.6. © (2012) Trans Tech Publications, Switzerland.


Zhang X.,Shandong Provincial Key Laboratory of Appraisal and Retrofitting in Building Structures | Yue Q.,Shandong Provincial Key Laboratory of Appraisal and Retrofitting in Building Structures | Shi R.,Shandong Jianzhu University
Jianzhu Jiegou Xuebao/Journal of Building Structures | Year: 2014

Shear-span ratio is one of important factors in the performance of frame structure underpinning joints. In order to investigate the mechanical behavior of the underpinning joints with small shear-span ratios (0.43≤λ≤0.70), eight joint specimens were tested. The research reveals as the shear-span ratio decreases, the crack load and bearing capacity of the underpinning joints increase. The oblique shear cracks appear first and turn to be the main cracks. The vertical cracks at the middle of the underpinning beams emerge lately and are not obvious. The brittle shear failure takes place suddenly. The interface between the beam and column is chiseled and connects well. The comparison of the bearing capacity of the underpinning joints between the theoretical formula in JGJ/T 239-2011 'Technical specification for moving engineering of building' and the test results show that the theoretical formula can satisfy the safety requirement of the real engineering.


Zhao K.Z.,Shandong Jianzhu University | Zhao K.Z.,Shandong Provincial Key Laboratory of Appraisal and Retrofitting in Building structures | Liu L.L.,Shandong Jianzhu University
Applied Mechanics and Materials | Year: 2013

In recent years, natural disasters occurred more frequently in our country, dangerous housing in rural areas often cause a lot of casualties and property losses. Due to the shortage of national financial, the government decided to focus financial support on the renovation of dilapidated buildings. In order to have a deep understand of the rural structure, distribution law and the proportion of the dilapidated housing, after the survey of the housing situation in Dongying County Dongying City, Jiaxiang County Jining City and Yiyuan County Zibo City, this article made the statistics and analysis of the status of housing in these three counties. The result of analysis and statistics show that the rural housing mainly conclude adobe housing, brick masonry housing and block masonry housing, the proportion of dilapidated houses in rural housing is about 10.9%, the dilapidated buildings are mainly distributed in the mountain, because the mountain area's foundation of economic is weak, and the housing structure is mainly in the form of adobe housing and stone masonry housing. The main types of dilapidated housing are adobe housing and stone masonry housing primarily, the brick masonry housing newly built is in relatively low risk level. The government finances should inclined to transform the dilapidated housing in the mountain area first. In order to improve the quality of new housing in rural areas, this new housing in rural areas will also need to pay attention to the problem made some conclusions. © (2013) Trans Tech Publications, Switzerland.


Zhao K.Z.,Shandong Jianzhu University | Zhao K.Z.,Shandong Provincial Key Laboratory of Appraisal and Retrofitting in Building Structures | Wang G.Y.,Shandong Jianzhu University
Applied Mechanics and Materials | Year: 2013

Assembly box concrete hollow floor sructure is a new-style whole structure that are constituted by the a cross section of a concrete box composed of small prefabricated components (concrete superposition box) and a cast-in-place concrete rib beam.The internal force distribution law was analyzed in this paper, based on the static load experiment with a multi span column-supported assembly box concrete hollow floor.The findings prove that the prefabricated boxs and cast-in-situ concrete ribbed beams are able to form a whole to jointly bear external forces, that the internal force distribution law is basically the same with the solid cast-in-situ concrete floor with no beams, and that the floor structure can be simplified to the column strip and middle strip.The specific distribution ratios between the minus moment and the plus moment of the column strip and middle strip respectively are as follows. For the angel area floor(contianed edge beams), the ratio of midspan section is 0.537:0.463, the ratio of support section is 0.816:0.184; for the edge area floor(contianed edge beams), the ratio of midspan section is 0.51:0.49, the ratio of support section is 0.808:0.192; for the inner area floor, the ratio of midspan section is 0.55:0.45, the ratio of support section is 0.75:0.25. © (2013) Trans Tech Publications, Switzerland.


Zhao K.Z.,Shandong Jianzhu University | Zhao K.Z.,Shandong Provincial Key Laboratory of Appraisal and Retrofitting in Building structures | Han Y.,Shandong Jianzhu University
Applied Mechanics and Materials | Year: 2013

In masonry structure transformation, due to the removal of walls, force transmission path and force structure mechanism of load-bearing walls will be changed. So it become greatly important to adopt a safe, applicable, economic and reasonable underpinning method. This paper introduces several underpinning methods of masonry structure modification, which summarizes the advantages and disadvantages of them. Their characteristics and using condition are discusses in the paper. Some conclusions which are drawn may be referenced for the future engineering practice. © (2013) Trans Tech Publications, Switzerland.


Zhao K.-Z.,Shandong Jianzhu University | Zhao K.-Z.,Shandong Provincial Key Laboratory of Appraisal and Retrofitting in Building Structures | Li Z.-R.,Shandong Jianzhu University | Wang L.,Shandong Jianzhu University | And 4 more authors.
Gongcheng Lixue/Engineering Mechanics | Year: 2011

Assembly Box Concrete Hollow Floor is a new-style whole structure-with a cross section of a concrete box composed of small prefabricated components (concrete superposition box) and a cast-in-place concrete rib beam. The mechanical performance of the structure is analyzed in this paper based on the experiment with the test blocks of assembly box concrete hollow floor, and the failure mechanism affected by the load of floor is obtained. The findings prove that the prefabricated box and the cast-in-place concrete rib beam could interact, and in the calculation of floor framing design, a simplified flexural computing could be used, and each rib beam is taken as one computing unit. The top floor of the box could be used as the compressed flange, and the effective width of the compressed flange could be the sum of the two smaller figures, which are of the depth of 12 times of the box floor and the width of the cross section and the net span of a rib beam. The steel bars installed in the tensile area of the bottom floor of the box could fully exert its role, which could be taken into account in the flexural computing. The rack space and width in the bottom box floor of the tensile area are different from the cracks of the rib beam. The crack of the floor should be computed in accordance with reinforced concrete axial tension components, and that of the rib beam should be done according to the flexural member.


Zhao K.,Shandong Jianzhu University | Zhao K.,Shandong Provincial Key Laboratory of Appraisal and Retrofitting in Building Structures | Wang F.,Shandong Jianzhu University | Bian X.,Shandong Jianzhu University
Advanced Materials Research | Year: 2012

The concrete-filled glass fiber reinforced gypsum wall panel is a kind of panel that the inside cavums of the glass fiber hollow gypsum panel are filled with concrete, which can be used as the bearing wall of a building. The influences of eccentricity distance and height to thickness ratio on the bearing capacity of the compression wall panels were studied, and the failure mechanism and bearing capacity of compression wall panels were gained through the experiments of twenty-seven(nine groups) axial compression wall panel specimens and twenty-seven(nine groups) eccentric compression wall panel specimens. The analysis results indicate that the bearing capacity of compression wall panels is obviously affected by the eccentricity distance and height to thickness ratio, and there is a linear relation between bearing capacity and eccentricity distance. The bearing capacity calculation formula of the concrete-filled glass fiber reinforced gypsum wall panel is obtained by regression analysis, which provides reliable gist for structural design of concrete-filled glass fiber reinforced gypsum wall panel buildings. © (2012) Trans Tech Publications, Switzerland.


Zhao K.Z.,Shandong Jianzhu University | Zhao K.Z.,Shandong Provincial Key Laboratory of Appraisal and Retrofitting in Building Structures | Zhu Z.F.,Shandong Jianzhu University
Applied Mechanics and Materials | Year: 2014

channel - masonry - concrete composite structures underpinning is a new type of underpinning technology, the two channel steel and the concrete of compression flange and the masonry between the channel combined into an overall flexural members, it can used in masonry structure underpinning the transformation of the wall, it has simple construction, safety and reliability, the combination of large carrying capacity and other characteristics. Through this combination of three members in bending tests, we can get, reinforced by setting off key, channel, masonry and concrete can form a combination of flexural members to work together, channels tensile stress, concrete bear stress, masonry between the channel improved stability of the web and shear capacity of the beam, we gives the flexural capacity calculation method of the composite structure through analysis. © (2014) Trans Tech Publications, Switzerland.


Zhao K.Z.,Shandong Jianzhu University | Zhao K.Z.,Shandong Provincial Key Laboratory of Appraisal and Retrofitting in Building Structures | Liu J.J.,Shandong Jianzhu University
Applied Mechanics and Materials | Year: 2014

Concrete composite beam floor cage floor as a new form, with a saving of steel and concrete, lighter weight, the advantages of high capacity, and has been more widely used in engineering. Therefore, to carry out the new concrete composite beam floor cages fire behavior for large spaces, large span areas is necessary. This article is the use of finite element software ANSYS multi-span composite floor beams cages fire tests to simulate life and death through SOLID70 unit features analog composite bottom plate before and after bursting floor temperature field and gives composite floor box overall temperature distribution along the rib cloud cover and the temperature of the beam cross-section of different heights - time curve, finally, the simulation results and experimental conditions were compared and analyzed, the main draw the following conclusions: the use of ANSYS thermal unit SOLID70 cell function and death can be simulated temperature distribution in case of fire concrete composite floor beam floor cages before and after bursting through the ribbed section of different heights temperature - time curve can be seen, the test results agree well with the simulation results; testing process with increasing temperature, floor surface inlets, stacked boxes floor temperature contours directly reflects the law during the test floor surface appears inlets. © (2014) Trans Tech Publications, Switzerland.

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