The conditions of mix proportion of steel fiber reinforced concrete were examined to obtain both the required workability and the required ductility. Under the condition of the amount that the unit absolute volume of coarse aggregate was 250 L/m³ or more, the larger it was, the greater the decrease in slump caused by mixing steel fibers was, and the velocity of concrete passing through obstacles tended to be slower. Furthermore, a simple method was proposed to evaluate the resistance against material segregation of concrete from the quality and the unit content of each component of the mortar.

In this paper, a method to evaluate the roof snow load using acceleration measurement is proposed. Its applicability was confirmed by being applied to snow load on a semi-full-scale wooden structure building model. The natural frequency change caused by the roof load variations was investigated by acceleration measurement using an inexpensive instrument. By the comparison of the measured result to the actual snow load measured by load cells, it was shown that it is possible to estimate the snow load on the roof within an error of 20% at maximum even with the inexpensive accelerometer.

This paper discusses a basic proposal and investigation of a damage evaluation method for steel members by temperature measurement. Dynamic cyclic loading tests were conducted on specimens simulating steel members subjected to cyclic bending stress, and the temperatures of various parts of the specimens were measured to confirm the applicability of the proposed damage evaluation method. As a result of the experiment, it was confirmed that the damage evaluation based on the temperature measurement agreed with the damage degree estimated from the history of load and deformation.

The deformation behavior of prestressed timber beam after the gap opening occurred at the connection is evaluated in this study by the compressive stress distribution along the beam length. The correlation of moment and beam deformation is checked by three types of specimens, the results indicate that the prediction is in good agreement with the experiment results up to the proportional limit of the material. In addition, the bending ultimate strength calculated by compressive stress distribution of the interface which is set from the compressive stress-strain relationship is also verified with the value of the moment in the experiment.

Cement-based adhesives used for post-installed anchors are suffer from a frost damage at early age when these are installed in a cold environment. In this study, shear tests and pull-out tests were conducted using cementitious adhesives containing a cold resistance accelerator. From the test results, both the shear and bond stresses exceeded the design strength based on the guidelines. In addition, the authors have proposed the dowel model to estimate the cyclic shear behavior of anchors. In this study, the reloading behavior of the model was modified. As a result, the modified model could reasonably evaluate the test results.

The Architectural Institute of Japan (AIJ) Recommendations specify requirements for H-shaped steel columns forming plastic hinges. However, the Recommendations contain no rationale for determining an acceptable lateral-torsional buckling slenderness ratio due to the direct quotation of the steel beams’ limitation. A previous study clarified that a beam-column susceptible to lateral-torsional buckling could not be properly evaluated by the requirement. Therefore, in this study, an index considering lateral-torsional buckling is proposed. In addition, a plastic deformation capacity evaluation formula, modified requirements, and strength correlation are proposed based on the proposed index.

NC braced frames proposed by the authors have a response reduction capability due to elastic energy accumulation. This paper clarifies seismic response behaviors of multi-story NC braced frames through a time history analysis and expands a seismic response prediction method of single-story NC braced frames to the multi-story frames by reflecting the response behaviors. Verification of the prediction accuracy using 17 seismic ground motions with various spectral characteristics was carried out in a practical range of brace stiffness ratio and damping ratio. The prediction method accurately grasped a trend of the maximum response of the multi-story NC braced frames.

In this study, a static vertical load test was conducted on the uppermost layer of the 1/10 model of the Hokiji three-storied pagoda.

The test conditions were (1) Only rafters are used without using roofing boards, (2) The fulcrum of the Gagyo is only at the corner, and (3) Roof load shall be 2940N /㎡.

As a result of conducting the experiment, the following conclusions were obtained. (1) Immediately after loading, compression was acting on Roban and Kayaoi, but after 120 hours, it changed to tension.(2) It is possible that stress is being redistributed.