Abstract This paper presents a new method that involves the use of double integral with wavelet transform for computing capacity curve system multiple degrees freedom. The displacement response building is derived from measurements its acceleration, thus facilitating assessment damage to as soon possible after an earthquake. validity assessed against existing shaking‐table results reinforced concrete structure.

A brand-new structural type, termed thick wall-thick slab structure, has been developed in recent years based on the reinforced concrete wall structure Japan. This type of system can not only maintain high seismic performance, but also provide large interior space and improve flexibility architectural design that is more favored by architects. In present study, an equivalent cross-sectional area concept which a coefficient ratio proposed to estimate flexural strength horizontal member...

Abstract The present study developed a method for evaluating the response, damage, and repair cost of super high‐rise reinforced concrete (RC) buildings subjected to large‐amplitude earthquakes. response was numerically assessed using three‐dimensional 40‐story RC frame models under predicted seismic motions earthquakes along Sagami Trough Nankai considering effects slip behavior, slab cooperative width, stud‐type dampers. Even when mainframe exhibited slip, peak deformation effectively...

This paper presents an automated method for derivation of capacity curve from measured structural acceleration response. Based on the decomposition by wavelet transform method, behavior is directly evaluated in form a predominant response, as relationship between spectral force and displacement. It enables user to judge performance building quickly after earthquake. The feasibility proposed demonstrated through numerical simulations, full-scale shaking-table tests, actual response steel...

In modern society, architectural and civil engineering structures such as reinforced concrete buildings require high seismic performance to minimize the 'megarisk' exposed from urban earthquake hazards. structures, bond resistance between rebar is one important parameter for discussing its it has been typically evaluated by measuring strain distribution along embedded rebar. Here, we present in-situ stress measurements in using time-of-flight neutron diffraction a novel alternative technique...

Shake-table tests of a 3-story reinforced concrete building with cladding casted to be monolithic frame elements, seismic slits or cut reinforcing bars present in some elements ensure desirable deformation mechanism, was performed at E-Defense evaluate its post-disaster functionality. The satisfied response objectives; behaving elastically 0.33% drift less during "severe earthquake motion" defined the Japanese Building Standard Law, and has base shear capacity coefficient greater than 0.55....

The paper shows the static loading test results on full-scale reinforced concrete building utilizing columns with wing walls. specimen is a five-story 1×2 bays and height of about 19m. wall frame has large openings in longitudinal direction. gaps was formed along edge walls to make consisting beams. Attached works as rigid zones soften beams additional column section, calculated strength beam side sway mechanism. moment curvature distribution 1st story frames are evaluated experimentally...

Abstract A framework to extract a building's hysteretic response based on decomposing floor acceleration recordings into different ranks (i.e., decomposition levels) using the discrete wavelet transform (DWT) and then reconstructing signals considering only which corresponded predominant mode was recently proposed. However, current rank selection approaches require subjective judgment. This study looks develop an unbiased method enable automation of hysteresis extraction for easier adoption...

Once a catastrophic earthquake occurs, many buildings may be affected. Some are severely damaged and collapse during following strong aftershock. It is needed to conduct rapid inspection evaluate the in affected area. "Manual for post-earthquake rehabilitation techniques (draft)" was developed 1986 damage class of based on visual observation. Recent earthquakes revealed that it becomes quite difficult because structural members covered by finishings highrise were constructed. The author has...

In order to reduce further destruction of buildings and the number homeless people caused by aftershocks, a quick inspection damaged ought be carried out. This research aims at developing an integration method computing response displacement from measured acceleration. new provides automatic system performed few cheap accelerometers. The errors included in acceleration data can accumulated during double integral. integral method, which is based on Iwan's band-pass-filter, proposed this paper.

The neutron diffraction technique was applied to measure strain distributions in a rebar reinforced concrete. At first, absorption coefficients of several kinds concrete with different compounding ratios water, cement, and aggregate were measured, it confirmed that the coefficient affected by amounts water aggregate. In addition, also clarified measuring change under tensile loading accuracy measurement not Second, size anchorage zone evaluated pull-out loading. length measured shorter than...

According to past surveys of pile-supported RC buildings, severe building damage was not reported so often although recorded seismic motions around the buildings were considerably larger than their design motion. An effect soil-pile-structure interaction is one most possible reasons for this earthquake-damage reduction. However, actual shaking records at those have been rarely obtained. Therefore, it difficult demonstrate phenomena with input motion and records, research works usually...

A recently proposed three-dimensional (3D) linear method for examining soil-building interactions based on an input seismic wave field is, after some improvements, applied to estimate building responses in the reclaimed zone of Tokyo Bay, where ground motions include a considerable amount surface waves, thus reconfirming effects different situation. involves waves propagating 3D medium. The was developed with goal adequately treating trapped by (several-kilometers) deep underground structure...

Capacity curve estimated from seismic floor accelerations can provide an informative description of the structural behavior soon after earthquake. Detailed information on instrumented buildings is not always available. Therefore, this paper proposes a strategy based piece-wise cubic polynomial interpolation procedure to estimate capacity for high-rise using limited sensors placed at regular intervals along height building. The validity method assessed by numerical simulations and shaking table tests.